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ONT - LON

$365 Find cheap flights from Ontario to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to London departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/29
Sat 7/6

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to London.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to London.
In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Cheap flight deals from Ontario to London (ONT-LON)

 
These are the cheapest deals for flights from Ontario to London currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Ontario to London

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Ontario to London.

Recent one-way flight deals from Ontario to London

Only flying one-way? Below are some of the best one-way flight deals from Ontario to London found on KAYAK recently.

Recent last minute flight deals from Ontario to London

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Ontario to London.

Recent direct flight deals from Ontario to London

The latest deals for direct flights from Ontario to London so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Ontario to London

Find recent round-trip train or bus tickets from Ontario to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
10:36 pm - 8:10 amONT-LGW
25h 34m2 stops
2:30 pm - 9:54 amLGW-ONT
27h 24m2 stops
$556American Airlines
Find Deal
Sat, Jul 27 - Tue, Aug 27
10:46 am - 8:00 amONT-LHR
13h 14m1 stop
4:25 pm - 11:26 pmLHR-ONT
15h 01m1 stop
$638Iberia
Find Deal
Mon, Aug 19 - Thu, Sep 12
1:30 pm - 12:20 pmONT-LHR
14h 50m2 stops
10:25 am - 5:56 pmLHR-ONT
15h 31m1 stop
$640United Airlines
Find Deal
Mon, Aug 12 - Tue, Aug 27
1:30 pm - 12:20 pmONT-LHR
14h 50m1 stop
2:50 pm - 9:02 pmLHR-ONT
14h 12m1 stop
$653United Airlines
Find Deal
Sun, Aug 18 - Thu, Sep 5
4:31 pm - 1:35 pmONT-LHR
13h 04m1 stop
9:45 am - 4:08 pmLHR-ONT
14h 23m1 stop
$671British Airways
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Tue, Jul 9 - Tue, Aug 27
11:59 pm - 6:25 amONT-LHR
22h 26m1 stop
4:25 pm - 11:58 pmLHR-ONT
15h 33m1 stop
$696British Airways
Find Deal
Mon, Aug 12 - Mon, Aug 19
7:05 am - 8:00 amONT-LHR
16h 55m2 stops
6:15 am - 7:33 pmLHR-ONT
21h 18m2 stops
$862Delta
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Mon, Jun 24 - Fri, Aug 23
2:15 pm - 2:50 pmONT-LHR
16h 35m1 stop
9:00 am - 10:38 pmLHR-ONT
21h 38m2 stops
$890Delta
Find Deal
Tue, Jun 11 - Fri, Jun 21
11:22 am - 9:50 amONT-LHR
14h 28m1 stop
11:00 am - 4:16 pmLHR-ONT
13h 16m1 stop
$935Virgin Atlantic
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Wed, Jun 5 - Wed, Jun 19
7:05 am - 9:15 amONT-LHR
18h 10m2 stops
10:55 am - 11:42 pmLHR-ONT
20h 47m1 stop
$1,059Virgin Atlantic
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Tue, Jun 18 - Thu, Jun 27
10:19 am - 1:30 pmONT-LGW
19h 11m2 stops
Thu, Jul 18
1:10 pm - 10:45 pmONT-LHR
25h 35m3 stops
Thu, Aug 15
7:25 pm - 8:10 amONT-LGW
52h 45m2 stops
$415American Airlines
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Fri, Oct 11
1:10 pm - 10:45 pmONT-LHR
25h 35m3 stops
Thu, Aug 15
6:00 am - 9:25 amONT-LHR
19h 25m1 stop
$428American Airlines
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Tue, Aug 27
10:46 am - 7:55 amONT-LHR
13h 09m1 stop
$432British Airways
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Wed, Aug 7
9:19 am - 10:50 amONT-LHR
17h 31m1 stop
$433British Airways
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Sun, Jul 14
1:45 pm - 9:40 amONT-LHR
35h 55m2 stops
$453United Airlines
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Sat, Aug 3
1:47 pm - 12:20 pmONT-LHR
14h 33m2 stops
$517United Airlines
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Tue, Jul 9
7:00 am - 8:10 amONT-LCY
17h 10m2 stops
$2,278Delta
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Thu, Sep 19
6:00 am - 10:25 amONT-LHR
20h 25m1 stop
2:50 pm - 12:33 pmLHR-ONT
29h 43m1 stop
$891United Airlines
Find Deal
Fri, May 31 - Fri, Jun 7
6:00 am - 6:55 amONT-LHR
16h 55m1 stop
2:50 pm - 8:48 pmLHR-ONT
13h 58m1 stop
$894United Airlines
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Fri, May 31 - Tue, Jun 4
12:53 pm - 11:05 amONT-LHR
14h 12m1 stop
3:15 pm - 10:59 pmLHR-ONT
15h 44m1 stop
$1,029American Airlines
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Tue, Jun 4 - Wed, Jun 19
11:22 am - 9:50 amONT-LHR
14h 28m1 stop
1:55 pm - 11:59 pmLHR-ONT
18h 04m2 stops
$1,067Delta
Find Deal
Mon, Jun 3 - Tue, Jul 30
7:40 pm - 7:45 pmONT-LHR
16h 05m2 stops
12:15 pm - 9:40 pmLHR-ONT
17h 25m2 stops
$1,102American Airlines
Find Deal
Mon, Jun 3 - Thu, Jul 25
11:22 am - 9:50 amONT-LHR
14h 28m1 stop
10:55 am - 11:59 pmLHR-ONT
21h 04m1 stop
$1,112Virgin Atlantic
Find Deal
Mon, Jun 3 - Sat, Jul 27
11:22 am - 9:50 amONT-LHR
14h 28m1 stop
10:55 am - 4:17 pmLHR-ONT
13h 22m1 stop
$1,288Delta
Find Deal
Tue, Jun 4 - Sun, Jul 28
6:50 am - 2:50 pmONT-LHR
24h 00m1 stop
10:50 am - 11:59 pmLHR-ONT
21h 09m2 stops
$1,293Virgin Atlantic
Find Deal
Mon, Jun 3 - Sat, Jul 27
12:53 pm - 11:05 amONT-LHR
14h 12m1 stop
12:00 pm - 10:05 pmLHR-ONT
18h 05m1 stop
$1,514British Airways
Find Deal
Tue, Jun 4 - Thu, Aug 1
12:53 pm - 11:05 amONT-LHR
14h 12m1 stop
3:30 pm - 10:40 pmLHR-ONT
15h 10m1 stop
$1,646British Airways
Find Deal
Mon, Jun 3 - Sat, Aug 3

Flights from Ontario to London - Travel Insights & Trends

Get data-powered insights and trends into flights from Ontario to London to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to London?

The average price of all flights from Ontario to London clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Ontario to London, look for departures on Tuesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from London, Friday is the cheapest day to fly and Thursday is the most expensive.

What is the cheapest month to fly from Ontario to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Ontario to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Ontario to London is October, where tickets cost $611 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,029 and $945 respectively.

How far in advance should I book a flight from Ontario to London?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Ontario to London, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Ontario to London, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 14 days before departure.

Which airlines provide the cheapest flights from Ontario to London?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the best return deals on flights connecting Ontario to London were found on American Airlines ($556) and Iberia ($638). American Airlines proposed the cheapest one-way flight at $415.

Good to know

Low season

January

High season

June

Cheapest flight

$365
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly with an average 49% increase in price.
Flight from Ontario to London Gatwick Airport

When to book flights from Ontario to London

Are your dates flexible? Find out the best times to travel from Ontario to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to London

  • How can I get to the city center by public transport after my flight from Ontario to London?

    Upon arrival at London Heathrow Airport from Ontario, you can easily reach the city center using public transportation. Take the Heathrow Express train to Paddington Station, which operates every 15 minutes. From Paddington, you can transfer to the London Underground and take the Bakerloo Line or Circle Line to reach the city center.

  • Can I pre-book my seat on WestJet flights from Ontario to London?

    Yes, you can pre-book your seat on WestJet flights from Ontario to London. WestJet offers the option to select your preferred seat in advance, allowing you to secure your desired seating arrangement for a more comfortable journey. By accessing their online booking portal or contacting their customer service, you can make seat reservations according to your preferences and availability.

  • Which kid-friendly amenities does WestJet have on flights from Ontario to London?

    WestJet offers several kid-friendly amenities on flights from Ontario to London. These amenities include children's entertainment options such as movies, TV shows, and games suitable for different age groups. They also provide complimentary activity packs with coloring books, crayons, and puzzles to keep young travelers engaged during the flight.

  • What are the baggage restrictions when flying Virgin Atlantic from Ontario to London?

    The baggage restrictions when flying Virgin Atlantic from Ontario to London include a checked baggage allowance of two pieces weighing up to 50 lbs each in Economy class. Additionally, passengers are allowed one carry-on bag weighing up to 22 lbs and one personal item such as a laptop or handbag.

  • What is the cheapest flight from Ontario to London?

    In the last 3 days, the lowest price for a flight from Ontario to London was $365 for a one-way ticket and $556 for a round-trip.

  • Do I need a passport to fly between Ontario and London?

    A passport is required to fly from Ontario to London.

  • Which aircraft models fly most regularly from Ontario to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to London?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Ontario and London, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to London, Delta or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from Ontario to London are Delta and Virgin Atlantic. With an average price for the route of $638 and an overall rating of 8.0, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $722 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Ontario to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Ontario with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Ontario to London

  • Common layover options for Air Canada flights from Ontario (ONT) to London (LON) may include stopovers in major hub cities such as Toronto, Montreal, or Ottawa. These layovers often provide convenient connections for passengers, allowing them to change planes and continue their journey to London.
  • Additionally, Air Canada offers a special food service called "Chef's Menu" on its flights from Ontario to London. Passengers can enjoy a delectable selection of culinary delights prepared by renowned chefs. The menu features a range of gourmet dishes using fresh, locally sourced ingredients, ensuring a delightful dining experience in the skies. From appetizers to main courses and desserts, Air Canada's Chef's Menu promises to satisfy the taste buds of travelers throughout their journey.
  • Air Canada offers a variety of in-flight entertainment options on its flights from Ontario to London. Passengers can enjoy a selection of movies, TV shows, and music, with a wide range of genres to choose from. Additionally, the airline provides personal screens with touch controls, offering a seamless and enjoyable viewing experience.
  • WestJet assists passengers with disabilities traveling from Ontario to London. They offer wheelchair assistance, accessible seating options, and priority boarding. Passengers can request special services such as mobility aids or medical equipment during their journey. WestJet's trained staff is available to ensure a comfortable and safe travel experience for passengers with disabilities, addressing their specific needs and providing necessary support throughout the journey.
  • You can change your seat when flying with WestJet from Ontario to London. Seat changes are subject to availability, and you can make the change either during the booking process or by accessing your reservation online. Alternatively, you can contact WestJet's customer service for assistance with seat changes.
See more tips

Top 5 airlines serving from Ontario to London

 
See real verified KAYAK customer reviews for airlines flying from Ontario to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10457 reviews
8.6Crew
8.2Boarding
8.0Entertainment
7.9Comfort
7.4Food
Airline reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

10.0 ExcellentMichael, May 2024SJC - ATL
Read more about Delta reviews

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Half the bathrooms assigned to economy were out of action

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

Quick flight. But cabin crew were very noisy and talking too much, especially when we were seated at the back of the plane trying to sleep through the night .

My ticket was for Premium Economy and all the seats were taken, I was placed in Economy class and I’m looking for a refund.

Unfortunately delayed 2 hrs due to faulty tyre.. which had to be changed, but better safe than sorry.

The delay was an issue. Other than that. Every thing good

Hi vergin Atlantic service was good but the flight ticket agent travel up charge me extra 57 pounds as a airport charges, actually I refuse to pay but they say if I not pay £57 then they say you will not be able to travel from Heathrow to goa ,so for me there was no option and it was just 3 day before my departure so i paid, so please look in to the matter. And I have a receipt of £ 57 as well .thanks

Staff didn’t check cabin well for landing seemed more interested in chatting to each other. Food was poor and differed from pre order.

We were in the last group to be called to the flight - which was 30 minutes late taking off. While we were lucky enough to have been given bulkhead seats (due to a medical condition I’d told them about beforehand) the seats weren’t particularly comfortable. A crying baby for the whole trip made things worse, so the crew managed very well with coping. The final thing I’d say was that there wasn’t enough food served during the flight.

Very good. Glad we had Premium for the flight out.

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff were fantastic friendly nice they came round and check we need anything else to eat or drink

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

On time take off…US cabins look tired and need of refresh!

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Hated every minute of it. This flight should have only taken 1.5hrs but was delayed over 10hours. Now I am being told I cannot be compensated or refunded my ticket price or extra leg room, which I purchased but did not receive, because the airline is throwing the blame on the 3rd party I purchased tickets through and 3rd party putting the blame on airline. No one wants to help. They received their money and that's all they care about. Im going on 3 days of still trying to get to my final destination, had to cancel car rental, car insurance and hotel. Currently staying in airport until hotels open up. Thank you Lufthansa, Kayak, Underpricer and United for making this trip the worst ever.

Crew was great and did their best to make us comfortable and captain came out at the beginning to announce why the flight was delayed, weather situation up ahead, and kept us updated throughout the flight.

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Our flight was delayed 2.5 hrs due to plane being too hot! After 1.5 hrs, airline decided to use another plane but had to wait for gate, baggage transfer & beverage transfer. Anyone could tell after first half hour that another plane was required and although did not affect us many would miss connecting flights at Heathrow. I have found the stewards are not the friendliest in the industry and the food is questionable, even as I like airplane food normally, the best of the 2 flights was the yogurt & granola for breakfast.

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

The return trip was a customer service disaster. American Airlines needs an overhaul of how they treat their customers.

Was flying in premium eco and there were around 5-6 movies I wanted to watch and none of those could I play for some reasons. Not just me we checked w the person sitting next to me. Few of the movies were only playable :( Also that was not great that we couldn't upgrade to business however tried to, many times before the flight :(

You cancelled my flight by email then made it very difficult to get in contact with you. Then put me in a flight with a long layover in Mexico returning to the wrong airport in uk. Mind blowing my stressful. I missed see my grand dad because of you.

This was not the BA business class it used to be. Mediocre food, attendants seemed stretched thin. All the little luxuries that used to make BA business fun were missing. Flight delayed and the explanation given was they forgot to pick up crew - I hope I misheard! Transfer in LHR “sticky” - we thought we had way too much time at 3hours but it was needed. Next time will try different route.

Very bed boarding, there was overbooked and make a lot of problems and noises

On my way from Chicago to London, I was seated next to a quite heavy passenger. I could barely move. BA should have ensured that overweight customers are placed in comfortable seats and not to penalize also other passengers because BA is not willing to accommodate these passengers and their needs. No respect at all.

The flight as far as timings go was excellent. Unfortunately we ended up sat with someone on a night flight who had been drinking alcohol before boarding and BA staff were happily serving him more alcohol. He was very drunk which made our flight uncomfortable and awkward. My partner had this person lying on him whilst asleep. Alcohol should be served minimally. If there had been an emergency this person would not have been in a fit state to act accordingly.

First time flying with BA and I will do it again. Staff at airport and on board were very nice and helpful

Wonderful service and very comfy in the bulkhead in Economy Plus! Delicious food.

The BA team at Sky Harbor is deplorable, full of unnecessary attitude and poor communication. It seems like every member of the team was looking at another to solve the problem, instead of taking agency to do so themselves. I saw no less than 6 altercations with the same gate agent where he threatened to revoke the passengers boarding pass for asking a wildly reasonable question, something as simple as where the cue to board was. I’ve complained to BA before but it seems this isn’t an issue for them, which is very disappointing

Boarding poor in London,ok in Chicago. Don’t like Heatrow/terminal5

It was very good. We got a late start by about an hour and a half. However I worked rather have that than crash. It was purely mechanical. They had our tickets ready when we came off the plane in London for the next leg. The only mishap was when we got to Lisbon my husbands luggage made or bit mine didn't. All was not lost because I did finally get it 2 days later. I was really pleased that they c made the effort.

Liked that my American Airlines status seamlessly transferred to BA so luggage check was free. Flights were on time, boarding quick. Wish they didn’t assign connecting gate so late at Heathrow.

The entire process was flawless and as expected flying first class. The only thing that I have a complaint on...when first boarding, the plane was EXTREMELY cold; then when we were trying to sleep, it was way too hot - just better regulating (especially trying to sleep) would have made it perfect.

Book cheap flights from Ontario to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Ontario to London found on KAYAK in the last 72 hours.
7/18Thu
2 stops
19h 11mONT-LGW
$365
8/15Thu
3 stops
25h 35mONT-LHR
$415
10/11Fri
2 stopsAmerican Airlines
52h 45mONT-LGW
$415
8/15Thu
3 stops
25h 35mONT-LHR
$416
8/27Tue
1 stopAmerican Airlines
19h 25mONT-LHR
$428
8/7Wed
1 stopBritish Airways
13h 09mONT-LHR
$432
7/14Sun
1 stopBritish Airways
17h 31mONT-LHR
$433
8/3Sat
2 stopsUnited Airlines
35h 55mONT-LHR
$453
7/9Tue
2 stopsUnited Airlines
14h 33mONT-LHR
$517
9/19Thu
2 stopsDelta
17h 10mONT-LCY
$2,278

Search by stops

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Last minute flights from Ontario to London

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Ontario to London that are departing in the next 10 days.
5/31Fri
multi-stopUnited Airlines
20h 25mONT-LHR
6/7Fri
multi-stopUnited Airlines
29h 43mLHR-ONT
$891
5/31Fri
multi-stopUnited Airlines
16h 55mONT-LHR
6/4Tue
multi-stopUnited Airlines
13h 58mLHR-ONT
$894
6/4Tue
multi-stopAmerican Airlines
14h 12mONT-LHR
6/19Wed
multi-stopAmerican Airlines
15h 44mLHR-ONT
$1,029
6/3Mon
multi-stopDelta
14h 28mONT-LHR
7/30Tue
multi-stopDelta
18h 04mLHR-ONT
$1,067
6/3Mon
multi-stopAmerican Airlines
16h 05mONT-LHR
7/25Thu
multi-stopAmerican Airlines
17h 25mLHR-ONT
$1,102
6/3Mon
multi-stopVirgin Atlantic
14h 28mONT-LHR
7/27Sat
multi-stopVirgin Atlantic
21h 04mLHR-ONT
$1,112
6/4Tue
multi-stopDelta
14h 28mONT-LHR
7/28Sun
multi-stopDelta
13h 22mLHR-ONT
$1,288
6/3Mon
multi-stopVirgin Atlantic
24h 00mONT-LHR
7/27Sat
multi-stopVirgin Atlantic
21h 09mLHR-ONT
$1,293
6/4Tue
multi-stopBritish Airways
14h 12mONT-LHR
8/1Thu
multi-stopBritish Airways
18h 05mLHR-ONT
$1,514
6/3Mon
multi-stopBritish Airways
14h 12mONT-LHR
8/3Sat
multi-stopBritish Airways
15h 10mLHR-ONT
$1,646

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Ontario - London Flights

Departure:

Ontario (ONT)United States

Return flight deals:

London - Ontario

Cabin classes: