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Find cheap flights from London to Ontario from C$ 349

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from London to Ontario departing on 19/6. 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 15/6
Sat 22/6

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Best Ontario Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Toronto
Toronto1 stopC$ 605
Ottawa
Ottawa1 stopC$ 786

Good to know

Low season

January

High season

July

Cheapest flight

C$ 349
Best time to beat the crowds (1% less expensive on average)
Most popular time to fly (27% more expensive on average)
Flight from London Luton Airport to Toronto

FAQs - booking Ontario flights

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

    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 London to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from London 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 London to Ontario?

    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 Ontario with an airline and back to London with another airline.

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

    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 Ontario from London 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 cheap flights to Ontario

  • Morning departure is around 25% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from London to Ontario

 
Need help choosing which airline to fly with from London to Ontario? 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.
8.2
Singapore AirlinesOverall score based on 1447 reviews
8.7Crew
8.1Comfort
7.8Food
8.1Entertainment
8.4Boarding
Airline reviews

My experience with Scoot is very good. Will have no issue flying with Scoot again.

8.0 ExcellentAnonymous, Apr. 2024SIN - DPS
Read more about Singapore Airlines reviews

My experience with Scoot is very good. Will have no issue flying with Scoot again.

Good flight. The food was served a bit late, hence a hurry to finish before landing. Excellent crew and service

I requested an aisle seat and got a middle seat The flight gate was changed and the flight was delayed

People were so nice! Economy seats were small and cramped feeling for me. I’m slender and 6 feet tall

Perfect experience from boarding through to leaving the flight, comfortable and personalised service from all staff, highly recommended

The overall operation needs to be improved. The in-flight services took forever and sometimes ran out of options.

Left hr late & arrived 1hr late luggage was slow to be offloaded! The flight crew & food were good! Movie selection was ok!

We started with a 2 hour delay due to some airplane technical issues, and while we got a little snack pack, it was a pretty long delay for SQ. The flight itself was short, there's no entertainment on the B737-800 and there's a small snack. Functional.

The male traveller seated in the row in front diagonally opposite my husbands seat across the aisle as soon as the seatbelt sign went off moved across the aisle into the seat in front of my husband for the entire journey from London to Singapore he had his seat reclined and pushed back and the seat touching my husbands knees for the entire journey from London to Singapore. very uncomfortable for my husband.

I cancelled my family 2023 international vacation because you guys double booked me with the same date, passengers, airlines and just hours difference and did not want to refund me at the right time and then finally cancelled the extra booking! Cancelling the booking that I personally booked! And you guys kept the unauthorized booking! This experience was really bad! Ruined everything! Never again I will book with kayak , me , my family , my friends and most importantly I will advocate to everyone to make sure not to book with Kayak! None existing customers service! Only 3rd provider that serve only their company and not the travelers!!!!!!

Cathay Pacific seems to be an airline in trouble and on its way out. Lots of broken or poorly functioning things like entertainment screens, seats, and enough well trained staff to handle a full flight. Sad...

The flight crew was exceptionally good. Personal needs were well met. The food choices were very nice.

While I was in great pain, the seat was sufficiently comfortable to allow me to rest and not be in so much pain.

My seat was sold off to someone else. Had to wait 9 hours to catch the next filght. Definitely will never use Cathay Pacific again. Bad, very bad airline. will comment on google reviews too.

Not impressed with check in desk staff at Vancouver airport. Not a professional mind service and not cared or tried to help. Don’t think I would fly with them again

One of the worst flight in business class by qatar airways and I’m no stranger with qatar airways businesses class, I travelled with the extensively in the past 12 years

Very comfortable flights. Not so many new releases in terms of films.

The aircraft was slightly newer but the food was very bad. Bland and uninteresting. Nothing special at all.

The crew were fine. I didn’t enjoy the food at all. I found it unappetising and really had trouble eating it. The comfort level was fine and our return flight is with Cathay Pacific but honestly I probably wouldn’t fly Cathay Pacific again.

Would have liked working outlets on the flight. The first meal was very bleh, the second meal was a lot better so overall okay meals

On the flight back the seats where very uncomfortable, they where so bad that my back started to hurt after the first 2 hours. I can sit in a wooden chair for 2 hours. But these where just horrible, it just shows how cheap the airline has become. And the cabin was heated all those people in a heated cabin during a night flight. It was clear the climate control was not working. To top that off you are not even offered a glass of water, these people are animals.

We purchased a Go First Pass for 10 Euros each so we could board first, but everyone was able to board at the same time so we wasted 20 Euros. The flight left ab out 15 minutes late and was not allowed to land at Healthrow so we had to circle Heathrow for about 45 minutes. This caused us to almost miss our flight from Heathrow to Atlanta.

Severely delayed with no notice. Could have arrived at the airport hours later had we been informed of the delay

Once the boarding sign went on and all passengers gathered in line, we were left waiting standing up for almost an hour because there was a delay.

It would be nice to have vegan options for meals. The entertainment was not working on the the way to Austria. It was only available near the end of flight to Canada. The service was excellent.

Flight was delayed by approx 1 hour. The boarding process and the flight itself were very good, slightly tight squeeze for my legs but overall happy.

The business class layout on this plane is tightly packed and atrocious with no sense of privacy.

Flight was meant to leave at 8:30pm but there was a 2 hour delay 😞

Airmalta does not include meals in their flights and neither offers entertainment.

Pros: "The crew was amazing and took measures to make the flight Covid safe"
Cons: "The food was not the best and Twistees weren't available. Also the seats felt narrow"

The trip itself was good. I have given only good as rating, because my first flight has been cancelled by a different airline and that caused disruption in my trip. I spent over ten hours in Luton airport and that caused me high tiredness, sickness, because of the very early initial trip. easyJet staff has been professional and friendly.

Very pleasant crew, working hard on a full plane. Delay by a broken seat. However crew made back 60% of the delay.

Delayed and then further delayed with no announcement made so that all the passengers (who were standing in the jetty) could hear. We stood there for well over 20 minutes. We were further delayed through weather but no one explained that to us until the pilot made an announcement when finally on board

easyJet need to ensure that whether pre-booking seats or not children aren’t split from their parents the crew spent the majority of boarding asking passengers to move to accommodate two families. Surely the system identifies minors on a booking !!!!! It was all very frustrating to watch and caused delays which I’m sure cost easyJet more in the long run rather that automatically allocating families with minors seats together automatically.

Not great! Rude staff in London and the worse baggage reclaim I’ve ever seen. Great staff in flight but doubt I’ll fly with them again

Staff had been really impolite at the boarding area and for both ways charged high extra fees without a reason. For the check-in luggage which was measured 3.5 kg and was confirmed by the stuff to cost 40 € , 60 Euros had been purchased from our credit card. When confronted staff did call us both liars and claimed to never have announced anything. Flight back , when not wanting to press a backpack in a measuring metal instead of hand measuring , staff got angry that one did not follow her order, which was than escalated by the team. Although carrying a baby anyways staff did not offer any help in the unreasonable process and than charged again extra money. Cabine crew has been friendly but this experience LL lead to not booking easy jet at all in the future. Check in process in Edinburgh anyways chaotic,to the family check-in and disabled check-in everybody else was guided for check in process, so people just getting in between each other, not possible to monitor your own stuff.

As you would expect from a budget airline Left and arrived on time, no frills, not even a glass of water offered But you get what you pay for

I had an emergency escape seat. The attendant gave the extrA briefing to my side of the aisle but didnt direct it at all to the other where my wife was sitting

Boarding great. Didn’t eat or drink so can not comment.

Total jobs worths over carry on bags, charged £96 extra for bags that were clearly hand luggage

Very good, everything went straight forward, boarding, during the flight, landing and all on time Well done

flight delayed, no information given until late on, Ryanair app said "on time" until 5 minutes before expected departure time, crew rushed us to board, when it was already 3 hours late

I got denied boarding bevause they said they "ran out of seats on a plane"

Speakers were blaring. It's like being in a Moroccan market and you keep getting shouted at with what's for sale

What can you say Ryanair get you there,no frills Not so cheap anymore ..... but what is now days! Would use again as always. Good flight times for us.

Very unpleasant staff, disgusting service, ignoring requests, refusal to help

Late again rude staff at gate bullying passengers made us stand in the cold 3degrees for 40 mins before they let us board

The usual average Ryanair flight, but we landed 20 min before due time, which was very good.

Enjoyed our flight with Ryanair to Arrecife. Flight boarded pretty much on time, crew were welcoming and very good. Generally good for a frequent low cost flight, Seats could however have been more comfortable.

I wouldn't like to fly with them anymore, I don't like their service, you can hardly take carry-on luggage because they charge you for everything, you can't ask for a glass of water, and the flight attendant tells you that they don't have any, that you have to Paying 3 euros for a bottle of water horrible, I don't recommend it, and they don't have anything low cost, because the plane ticket may not be expensive but what they charge you later for the rest, the flight becomes more expensive, it's the only airline that I don't like it so far, and I traveled a lot.

Book cheap flights from London to Ontario

Recent round-trip flight deals

22/6Sat
directAir Transat
7h 40mLGW-YUL
7/7Sun
directAir Transat
6h 45mYUL-LGW
C$ 591
11/6Tue
1 stopAir Transat
16h 10mLGW-YUL
6/9Fri
1 stopAir Transat
29h 10mYUL-LGW
C$ 593
9/9Mon
1 stopTAP AIR PORTUGAL
14h 50mLHR-YUL
17/9Tue
1 stopTAP AIR PORTUGAL
16h 20mYUL-LHR
C$ 644
12/6Wed
1 stop
10h 34mSTN-YYZ
22/6Sat
2 stops
16h 50mYYZ-STN
C$ 687
22/10Tue
1 stopTAP AIR PORTUGAL
30h 20mLHR-YUL
26/10Sat
1 stopTAP AIR PORTUGAL
14h 45mYUL-LHR
C$ 706
20/6Thu
1 stop
10h 44mLTN-YYZ
25/6Tue
2 stops
17h 25mYYZ-LTN
C$ 717
9/9Mon
directAir Canada
7h 05mLHR-YUL
23/9Mon
directAir Canada
6h 40mYUL-LHR
C$ 728
15/6Sat
1 stopLufthansa
18h 20mLHR-YUL
22/6Sat
1 stopLufthansa
17h 40mYUL-LHR
C$ 733
27/8Tue
1 stopAir Canada
11h 20mLHR-YUL
12/9Thu
directAir Canada
6h 40mYUL-LHR
C$ 744
10/9Tue
1 stopLufthansa
11h 20mLHR-YUL
24/9Tue
directLufthansa
6h 40mYUL-LHR
C$ 755

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Recent one-way flight deals

19/6Wed
2 stops
24h 24mLTN-YYZ
C$ 349
19/6Wed
2 stops
24h 24mLTN-YYZ
C$ 350
21/5Tue
directAir Transat
8h 00mLGW-YYZ
C$ 463
24/6Mon
1 stopTAP AIR PORTUGAL
23h 05mLHR-YYZ
C$ 474
6/6Thu
1 stopTAP AIR PORTUGAL
23h 20mLHR-YYZ
C$ 490
10/6Mon
1 stopAir Transat
25h 45mLGW-YTZ
C$ 497
3/6Mon
1 stopWestJet
25h 17mLGW-YYZ
C$ 520
20/5Mon
1 stopWestJet
25h 17mLGW-YYZ
C$ 554
28/5Tue
1 stopIcelandair
26h 45mLHR-YYZ
C$ 569
5/6Wed
1 stopIcelandair
26h 45mLHR-YYZ
C$ 613

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Last minute flights from London to Ontario

Last minute flight, train and bus deals

21/5Tue
multi-stopAir Transat
25h 49mLGW-YYZ
28/5Tue
multi-stopAir Transat
12h 10mYYZ-LGW
C$ 625
20/5Mon
directAir Transat
7h 35mLGW-YUL
26/5Sun
multi-stopAir Transat
27h 50mYUL-LGW
C$ 636
21/5Tue
multi-stopAir Canada
10h 44mLHR-YTZ
4/6Tue
multi-stopAir Canada
19h 40mYTZ-LHR
C$ 662
21/5Tue
multi-stopAir Canada
10h 44mLHR-YTZ
3/6Mon
multi-stopAir Canada
17h 10mYTZ-LHR
C$ 663
17/5Fri
multi-stop
16h 09mLHR-YYZ
20/5Mon
direct
7h 10mYYZ-LHR
C$ 702
21/5Tue
multi-stop
10h 44mLHR-YTZ
3/6Mon
multi-stop
20h 20mYTZ-LHR
C$ 715
21/5Tue
multi-stopLufthansa
20h 10mLHR-YYZ
5/6Wed
multi-stopLufthansa
23h 45mYYZ-LHR
C$ 779
18/5Sat
multi-stopScandinavian Airlines
13h 50mLHR-YYZ
16/6Sun
multi-stopScandinavian Airlines
23h 40mYYZ-LHR
C$ 782
18/5Sat
multi-stopScandinavian Airlines
13h 50mLHR-YYZ
16/6Sun
multi-stopScandinavian Airlines
16h 35mYYZ-LHR
C$ 787
17/5Fri
multi-stopLufthansa
10h 19mLHR-YTZ
20/5Mon
multi-stopLufthansa
10h 40mYTZ-LHR
C$ 789

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Flights to Ontario

Return flight deals:

Ontario - London

Cabin classes:

C$ 4,361
C$ 1,219
C$ 635