£263 Find Cheap Flights from London to Ontario – Compare and Save

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 16/9. 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.
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1 adult, Economy, 0 bags

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Cheap Flights from London to Ontario

Cheapest return prices found by our users on KAYAK in the last 72 hours
Toronto
Toronto1 stop£405
Ottawa
Ottawa1 stop£429
Windsor
Windsor2 stops£491
London
London2 stops£481
Thunder Bay
Thunder Bay2 stops£488
Toronto
Toronto1 stop£405
Ottawa
Ottawa1 stop£429
Windsor
Windsor2 stops£491
London
London2 stops£481
Thunder Bay
Thunder Bay2 stops£488

Book Cheap London to Ontario Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from London to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from London to Ontario

Sat, 22 Aug - Thu, 3 Sep
Multiple Airlines Logo
08:30 - 11:45
LHR
-
YUL
32h 15m
1 stop
Multiple Airlines Logo
09:00 - 21:00
YUL
-
LHR
31h 00m
1 stop
£399Multiple Airlines
Wed, 2 Sep - Wed, 16 Sep
Air Canada Logo
09:30 - 12:00
LHR
-
YUL
7h 30mdirect
Air Canada Logo
22:10 - 10:00
YUL
-
LHR
6h 50mdirect
£400Air Canada
Thu, 22 Oct - Mon, 2 Nov
Air Transat Logo
12:40 - 19:32
LGW
-
YUL
11h 52m
1 stop
Air Transat Logo
06:45 - 09:45
YUL
-
LGW
22h 00m
1 stop
£401Air Transat
Thu, 10 Sep - Thu, 17 Sep
Multiple Airlines Logo
09:15 - 16:00
LCY
-
YUL
11h 45m
1 stop
Multiple Airlines Logo
16:40 - 08:40
YUL
-
LCY
11h 00m
1 stop
£401Multiple Airlines
Sun, 23 Aug - Mon, 31 Aug
Air Canada Logo
09:30 - 12:00
LHR
-
YUL
7h 30mdirect
Air Canada Logo
21:55 - 06:35
YUL
-
LHR
27h 40m
1 stop
£401Air Canada
Wed, 4 Nov - Wed, 11 Nov
Air Transat Logo
11:40 - 19:15
LGW
-
YUL
12h 35m
1 stop
Air Transat Logo
17:25 - 09:45
YUL
-
LGW
11h 20m
1 stop
£403Air Transat
Fri, 18 Sep - Tue, 29 Sep
Lufthansa Logo
09:30 - 19:25
LHR
-
YUL
14h 55m
1 stop
Lufthansa Logo
18:40 - 06:30
YUL
-
LHR
6h 50mdirect
£404Lufthansa
Wed, 2 Sep - Wed, 16 Sep
Lufthansa Logo
07:30 - 19:25
LHR
-
YUL
16h 55m
1 stop
Lufthansa Logo
22:10 - 10:00
YUL
-
LHR
6h 50mdirect
£404Lufthansa
Tue, 8 Sep - Tue, 22 Sep
Icelandair Logo
13:00 - 19:10
LGW
-
YYZ
11h 10m
1 stop
Icelandair Logo
20:45 - 14:40
YYZ
-
LGW
12h 55m
1 stop
£405Icelandair
Wed, 2 Sep - Sat, 12 Sep
Icelandair Logo
15:40 - 22:05
LGW
-
YYZ
11h 25m
1 stop
Icelandair Logo
20:45 - 14:35
YYZ
-
LGW
12h 50m
1 stop
£405Icelandair
Booking Insights

KAYAK's insights & trends for London to Ontario flights

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

How much is a return flight from London to Region of Ontario?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London to Region of Ontario departing in September.

Flight prices are below average for this route right now.

Flights to Region of Ontario from London usually cost between £493 and £710 in September.
The lowest price found in the past 5 days was £405 on Multiple Airlines (8 Sept–13 Sept).

What is the cheapest London to Ontario flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Ontario from London found in the last 5 days was to Toronto, at £367 return. The most popular route is from London Heathrow Airport (LHR) to Toronto Pearson Intl Airport (YYZ), and the cheapest return airline ticket found on this route in the last 5 days was £385.

What is the cheapest time of day to fly to Ontario?

The average price for all round-trip flights from London to Ontario depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Ontario is generally in the afternoon, when retur flights cost £551 on average. Morning departures are around 7% cheaper than evening flights, on average. The most expensive time of day to fly to Ontario is generally in the evening, which is peak travel time and where the average cost of a ticket is £595.

Can I save money by flying with a stopover from London to Ontario?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £550, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London to Ontario, 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 London to Ontario is February, when tickets cost £403 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of return tickets is £610 and £605 respectively.

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

The average price of all round-trip flights from London to Ontario clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Ontario on a Friday and more expensive on a Monday. On your return trip to London, you should consider flying back on a Wednesday, and avoid Saturdays for better deals.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London to Ontario, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from London to Ontario, you should book around 2 weeks before departure, which saves you about 10% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.

Good to know - Cheap tickets from London to Ontario

Low season

January

Cheapest flight

£263
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly (18% more expensive on average)
Flight from London Gatwick Airport to Montreal

Flights from London to Ontario: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from London to Ontario 
ChristopherFlew with Air Canada
LHR
-
YYZ
Sept 2024
Boarding of the plane is a nightmare, and the gate staff don’t allow sufficient time for each zone to board in order. Get in line ASAP and just start board as soon as they begin letting people on the plane. Also, the self service check in machines won’t print baggage tags (we tried four different machines and none of them would print a baggage tag even though we had done online check in to indicate that we had checked bags).
LydiaFlew with American Airlines
LHR
-
YYZ
Jun 2024
Give yourself enough connection time in London to clear customs even for connecting flights.
Verified travelerFlew with Air Canada
LHR
-
YYZ
May 2024
It is a long walk to the gate so make sure to leave yourself time. We were told 4 hours ahead and we should have taken that advice.

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 from London to Ontario is likely to change within 7 days, so travellers 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 return ticket. You could then fly from London to Ontario with an airline and back 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 from London to Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from London to Ontario

 
See real verified KAYAK customer reviews for airlines flying from London to Ontario. 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 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.
7.8
Air TransatOverall score based on 568 reviews
8.5Crew
8.0Boarding
7.1Entertainment
6.8Food
7.3Comfort
Airline reviews

My screen was broken so now movies, etc, but I didn’t really mind. They did work on it, so good effort on their part.

10.0 ExcellentWilliam, Jun 2026
LGW - YYZ
Read more Air Transat reviews

My screen was broken so now movies, etc, but I didn’t really mind. They did work on it, so good effort on their part.

i was not able to take my flight because the information i needed to book my dog correctly was not provided

They never sent me a confirmation to say my flight time had changed so I cut my holiday short by 6 hours Had to pay over 50 American for my luggage to be checked on the way home and that’s more that it cost on the way there. Arbitrarily charging more for the same thing when the passenger has no options is shady The cabin was an icebox going there and back, if all the passengers have their gloves on and their hoods up that should be an obvious sign to turn up the heat

The Turkish was good . I had a problem with air Transat terrible experience for me

Very good. A lot better experience then I expected for an economy flight.

Check in slow even though completed online check in, there was no bag drop available so had to query for 90mins as only 2 staff on desks.

Flying to a far away destination is a miracle in itself, so please take these with a grain of salt. The seats are a bit tired, and need a freshen up. The entertainment could be a bit newer, especially with all services available now. The food really is where we need help. But again, flying is a privilege, so all is good.

Never book through a third party. Book through Air transats website. Terrible process to get help and many issues happen with them and sister companies because half the flights you book with them aren’t even through air transat.

From what I saw there was no entertainment. Similar to my flight to London, I personally would like the attendants to be more interactive during the flight.

Airline Rep at Gatwick condescending and a very poor representative for this airline did request his name but he refused. Will certainty think twice to fly with this airline in future.

Lounge was top notch h with great variety of food and drinks. Cabin crew were great. Smooth flight.

My seat 3G did not go down fully and the buttons were not working properly

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Premium economy more comfortable than economy, but not by much. Did was awful, do not try the omelette. Flight crew were helpful. Flight was delayed by over an hour. Overall but bad, arrived safely and thank God.

Food was excellent. Service was very good. Staff was very helpful to all passengers.

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Seats were old and dirty, for a long haul flight you expect to be able to recline and for the av to work properly. Choice for vegans was fruit….

The Virgin Atlantic crew was very good. However, the equipment was OK, the seats were OK, but her bags did not arrive with me. Two bags showed up a day later and I’m still waiting for my third back.

great flights both ways on time both ways.staff(ladies) where great at check-in.

Was disappointed when landing in Canada was made to wait for over 1 hour with several other parents and babies for our strollers . The expectation was that the gate checked strollers would be there when exiting aircraft. This was not the case we were told to walk to a point and wait for them . After being left there and not being updated we were met with very hostile and rude air canada staff . There where no apologies or understanding even though all the children where very uncomfortable and the parents very frustrated as you can imagine . Instead the air canada staff at the airport where very rude and made an already frustrating situation much worse instead of trying to assure the parents that that were making effort to fix the situation. One gentleman in particular was very rude to some parents telling them to move when they were simply seeking information. He made the other parents including myself feel very uncomfortable. He also told a gentleman he was capturing images of everyones boarding pass when this was untrue as he was only taking a photo of the gentleman pass which was strange.

I wish they gave the earphones earlier rather than when we are already in flight.

We were a little late pushing back ,but arrived a head of time.

The 787 Dreamliner that we flew on was relatively new and a nice aircraft. We flew on a 777 which was noticeably older and the seats were average” but the 787 was very nice, especially for the price. No window blinds anymore, instead high tech adjustable polychromatic glass!! Nice.

an absolute disaster and nightmare on air condition. IT WAS FREEZING!! everyone around us had hats, hoodies, gloves outdoor jackets on. that segment of the aircraft had a fault I assume...no amount of suggestion to turn down the air con helped. otherwise all good.

Everything was very good, short delay Toronto to Regina on my return to Canada but not a big deal. Thanks Kayak, Dr. Ian Stewart

Boarded smoothly, took off on time. Entertainment screens were reliable and the movie library is abundant. Food better than wtst was served on the first leg of the journey by another airline.

It was ok. Even after the airport bus took us to the terminal , we did not expect to walk 35 mins inside the airport to the gate . A 15 min walk is ok . Especially if there was any delay in TSA check which happens to is too then people can easily miss the flight.

Always have no issues with air canada great staff and food just all around good air line my luggage however was 5 hours late and on another flight and I requested a wheel chair because of arthritis in my lower back and fake hip walking the distance in airport killed me no one showed up for me with requested wheel chair but ....in life stuff happens ..... still a good airline and good people

1. No food on a 8 hr flight is a travesty! The fare was not that low. 2. The entertainment was pretty bad and you had to buy headphones!!! 3. Only 2 toilets for the whole Economy section!!

If there was a disclaimer regarding food service or lack thereof, l missed it. If l had known l would have prepared better. Same with transferring at Reykjavik. No information about disembarking via stairs into rain, slush and puddles deep enough to swallow a foot. After being treated to haute cuisine restaurants and warm inviting environment during the flight, the airport is, let’s be kind, disappointing. Plane was comfortable, Airbus, staff were welcoming enough. I would likely try the route again. Maybe have a night and day in Iceland. Maybe not.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

My only area of issue was the flight was rather warm and the knobs for cool air didn't allow much cool air to come through. Everything else was great.

Been travelling for 2mo. And when you meet flight Attendants that love their jobs you can just tell. And makes flying with them worth another flight in the future!!

did internet check in but still had to get checked in at the counter and this was not the first time. Bummer!

Most of your crew was very helpful just one young lady wasn’t, but all of the ones I dealt with were great. We had to buy food on a six hour flight and considering we had a three hour flight before this one I felt we would have a meal included. I ordered a sandwich and by the time I got it, it was quite soggy so couldn’t eat half of the sandwich. Other than the food, or lack of, the flights were great.

Late start due to so called cargo door, super expensive meals and baggage check( only airline where meals and baggage is charged on long international flights) slow baggage delivery at end a lot of employees at airport standing around talking to each other.

Paying $75 for my bag is disgusting. Got off ground late so I missed my connections. Kept us waiting for passengers in the cold. Will not use them again.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

The flight was delayed by an hour. Made the connection uncomfortably tight.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

Flights scheduled with impossible connections - Lufthansa apparently believes it takes 7mins to change terminals, go through passport control, re-clear security and walk 1.8kms…..and everything will work perfectly (which it never does at Frankfurt). No staff on hand to assist with transfers on delayed flights. No transfer guidance provided by app. No compensation offered for 6hr delay to connecting flight.

Crew were friendly and very helpful Plane was clean and the legroom is standard. Overall a good flight, no complaints.

Tiny, cramped seats with minimum leg room and hard armrests. Basic needs like a seat and luggage came with an additional charge. Budget airline amenities with premium airlune cost. I won't use this airline again.

I'm Canaadian. I hate Air Canada. I used to give them a pass on their international service. No longer, They suck across the board now! Old planes, exhausted staff bad food and shitty entertainment. Your seats need reupholstered! Start with that...

Great flight. Left on time, not very crowded. Quiet and the right temperature.

I paid a lot of money for seat selection and was miserable for flight duration

Everything you need to know for your flight from London to Ontario

Cabin class types available on flights to Ontario

Cabin classes available on flights to Ontario. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.