Find flights
Deals
When to book
FAQs & Tips
Airlines

C$ 355 Find cheap flights from London to Ontario

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 10/9. 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
sáb 24/8
sáb 31/8

Search hundreds of travel sites at once for deals on flights to Ontario

In the last 7 days, travellers have searched 50,552,696 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Best Ontario Flight Deals

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

Ottawa
Ottawa1 stopC$ 756

Good to know

Low season

January

High season

July

Cheapest flight

C$ 355
Best time to beat the crowds (2% less expensive on average)
Most popular time to fly (28% more expensive on average)
Flight from London Stansted 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 13% 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 1367 reviews
7.7Food
8.4Boarding
8.0Comfort
8.1Entertainment
8.6Crew
Airline reviews

I loved the comfort of the flight and the hospitality of the flight attendants!

10.0 ExcellentDaniel, Jul. 2024DPS - SIN
Read more about Singapore Airlines reviews

I loved the comfort of the flight and the hospitality of the flight attendants!

They bumped us up. They overbooked the flight and we hurried to the next flight. We are a family of 5 with 13, 10 , and 6 year olds kids. Everybody was running to the next flight. We never been exhausted in our flights hust like we have experienced this week. Mismanagement in scoot and kayak.

Crews are not allowed to perform any service whenever the captain deems there’s a chance of turbulence. Even if it is perfectly smooth air.

They ran out of food for breakfast They did not offer tea or coffee The staff appeared very inexperienced The cabin was very cold, even with a blanket

If I made the connection in Singapore I was stuck there for 24 hours you owe me 355.00 for accommodations

Crews were great but food not much selection just all tailored for Asian passengers.

Too many luggages for 1 passenger (4 bags) will make all the overhead luggage bins a challenge to fit them all. Some have oversized hand carry as in like back packer size bags shouldn’t be allowed as handcarry.

The Premium economy class is not the same as some other airlines because there are no economy seats on these planes. Basically you’re getting an economy seat that’s a little wider. The seats are not that much more comfortable. The service and food experience is similar to economy class on other Asian airlines. There aren’t enough toilets for the entire plane therefore we are forced to share the business class toilets that are closed off with curtains.

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

All in all the flight was good. Love the fact that for airline food it was piping hot

Unfortunately I ended up beside a person who seemed to have been eating rotten corpses before landing because his breath smelled like Calcutta Sewage mixed with vodka and undigested eggs. Even wearing a mask that smell was so permeating that I couldn't breathe for the whole duration of the flight. I understand this is not CATHAY's fault but nevertheless I as a passenger had to endure this and there wasn't any way to fix it

There is very little in the title" Premium" in the Economy experience with Cathay, Melbourne to Hong Kong. The seats are uncomfortable and the cabin with outdated 1990's decor and trim. The food service was sloppy and the leg room providing little to no advantage over regular economy seating. Infact, the Sunday flight was not fill occupancy and I would have done better saving the significant additional costs for the PREMIUM ticket and taken advantage of the seating. If you are a regular premium economy traveler of EMIRATES expecting the same experience on CATHAY, you will be disappointed. Emirates far superior.

Bad experience. Departure time delayed from 1610 to 1740. After the flight was pushed back, pilot said there was a technical issue on the aircraft and we couldn’t take off. Delayed another hour to solve it.

Great, the flight attendants were very friendly and the food was also good.

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.

Our check-in was mediocre. We were told that we didnt have access to the lounge although we were in business and we were asked to remove 1kg from each of our checked luggages as they had 21 kgs and we found out that our tickets were for 20kgs checked bags. I would have expected: 1 - more clarity on the website so that I could see the difference on fares and be able to buy tickets with more checked luggage kgs allowance, and lounge access, and 2- more flexibility for business class passengers.

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.

Delayed almost 2 hours sitting on plane. No updates at all from flight deck and virtually no updates from cabin crew

Long delay resulted in my being unable to catch a train home and resulted in an additional £76 cost for an Uber

I was charged at the gate for bags I had already paid for. There was no other option. I am trying diligently thought easyJet website but making no progress HELP!

Be sure to check bags for 23 kg,.(50 lbs) Coming from US I chose the wrong size luggage weight when I checked in on my phone, and had to pay more when I dropped it off

The on board air steward really made the journey. He was very entertaining

I was disappointed there was a 40 minute delay to flight

Nothing! The service was excellent for accessibly challenged passengers, Used lift and all support personnel very helpful. Will fly again.

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

Ryanair is always shite. Slowest boarding possible in the most uncomfortable way. It’s like they are are tad sadistic.

Flight was delayed which happens but walking 15 mins to one gate to be then told it’s now changed to one 15 mins back then other way was frustrating

East check in and security. They are always delayed though. ALWAYS!

Amazed at huge number of people who hadn’t booked cabin bags with big troller cases and rucksacks, not being stopped, what’s the point in following rules or paying more if you don't have to bother?

Worse situation ever. Arriving at 4 am with 7 Hours of delay

Booked extra legroom seats but as plane had changed we ended up with normal seats. Very little attempt from staff to sort it out

It was delayed and there was no apology or any updates as to why. It was genuinely awful

It got us their! Delays Delays delayed, flight got in well after specified time, rental car firms shut at 11pm!!!! So from £300 for car to £689.. thank you Ryanair....

The distance between seats was narrow. So my recommendation is to increase it

The flight departed and arrived on time. A member of the staff at the gate was awful. She asked me to get the duty free purchases out of the hand luggage to see if it would fit inside their box, which it did. It was the embarrassment in front of the other passengers and the hassle of getting my stuff out of the bag and back in again that was totally unnecessary. They try to squeeze every single euro they can get out of their passengers. The seats were uncomfortable with little space in between them. The flight was quite noisy with lots of announcements trying to sell food, drinks, gifts and souvenirs etc.

Book cheap flights from London to Ontario

Recent round-trip flight deals

2/10qua
1 stopAir Transat
29h 44mLGW-YYZ
24/10qui
directAir Transat
7h 00mYYZ-LGW
C$ 561
30/8sex
1 stopAir Transat
29h 52mLGW-YYZ
8/9dom
directAir Transat
7h 05mYYZ-LGW
C$ 563
3/10qui
1 stopIcelandair
11h 10mLGW-YYZ
13/10dom
1 stopIcelandair
9h 45mYYZ-LGW
C$ 586
22/11sex
1 stopIcelandair
11h 20mLGW-YYZ
8/12dom
1 stopIcelandair
10h 10mYYZ-LGW
C$ 588
9/9seg
2 stopsLufthansa
16h 21mLHR-YUL
18/9qua
directLufthansa
6h 40mYUL-LHR
C$ 618
12/9qui
1 stop
13h 05mSTN-YYZ
17/9ter
1 stop
10h 40mYYZ-STN
C$ 625
18/11seg
1 stopTAP AIR PORTUGAL
25h 10mLHR-YYZ
27/11qua
1 stopTAP AIR PORTUGAL
17h 40mYYZ-LHR
C$ 629
12/9qui
1 stop
13h 05mSTN-YYZ
15/9dom
1 stop
10h 05mYYZ-STN
C$ 629
9/9seg
1 stopLufthansa
11h 35mLHR-YUL
20/9sex
directLufthansa
6h 40mYUL-LHR
C$ 657
19/11ter
1 stopTAP AIR PORTUGAL
13h 40mLHR-YYZ
26/11ter
1 stopTAP AIR PORTUGAL
24h 00mYYZ-LHR
C$ 664

Search by stops

Search by airline

Search by price

Recent one-way flight deals

10/9ter
1 stop
12h 55mSTN-YYZ
C$ 355
10/9ter
1 stop
12h 00mLGW-YYZ
C$ 355
24/9ter
1 stopWestJet
25h 27mLGW-YYZ
C$ 448
12/1dom
1 stopTAP AIR PORTUGAL
13h 35mLHR-YYZ
C$ 457
1/10ter
1 stopWestJet
14h 44mLGW-YYZ
C$ 461
12/1dom
1 stopTAP AIR PORTUGAL
15h 35mLGW-YYZ
C$ 468
2/9seg
directAir Transat
8h 05mLGW-YYZ
C$ 527
4/9qua
1 stopAir Transat
31h 34mLGW-YTZ
C$ 528
30/9seg
1 stopIcelandair
26h 45mLHR-YYZ
C$ 564
12/11ter
1 stopIcelandair
11h 20mLGW-YYZ
C$ 688

Search by stops

Search by airline

Search by price

Last minute flights from London to Ontario

Last minute flight, train and bus deals

30/7ter
multi-stop
23h 05mLGW-YUL
7/8qua
multi-stop
13h 10mYUL-LGW
C$ 1,028
29/7seg
multi-stop
30h 35mLGW-YTZ
5/8seg
multi-stop
31h 15mYTZ-LGW
C$ 1,115
30/7ter
multi-stopAir Transat
11h 30mLGW-YYZ
6/8ter
multi-stopAir Transat
9h 20mYYZ-LGW
C$ 1,193
28/7dom
multi-stopAir Transat
10h 20mLGW-YUL
30/7ter
directAir Transat
6h 45mYUL-LGW
C$ 1,197
30/7ter
multi-stopScandinavian Airlines
13h 50mLHR-YYZ
2/9seg
multi-stopScandinavian Airlines
19h 00mYYZ-LHR
C$ 1,230
29/7seg
multi-stopScandinavian Airlines
23h 25mLHR-YYZ
2/9seg
multi-stopScandinavian Airlines
19h 00mYYZ-LHR
C$ 1,232
26/7sex
multi-stopAir Canada
12h 27mLHR-YYZ
28/7dom
multi-stopAir Canada
10h 00mYYZ-LHR
C$ 1,236
26/7sex
multi-stopKLM
24h 55mLHR-YUL
29/7seg
multi-stopKLM
11h 00mYUL-LHR
C$ 1,237
29/7seg
multi-stopKLM
14h 09mLHR-YYZ
3/9ter
multi-stopKLM
11h 55mYYZ-LHR
C$ 1,243
29/7seg
multi-stopAir Canada
18h 34mLHR-YTZ
14/10seg
multi-stopAir Canada
15h 10mYTZ-LHR
C$ 1,280

Search by stops

Search by airline

Search by price

Flights to Ontario

Return flight deals:

Ontario - London

Cabin classes:

C$ 4,454
C$ 1,410
C$ 537