C$ 397 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 9/9. 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
1 adult, Economy, 0 bags

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Flight Deals

Best Ontario Flight Deals from London

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Toronto
Toronto1 stopC$ 759
Ottawa
Ottawa1 stopC$ 804
Toronto
Toronto1 stopC$ 759
Ottawa
Ottawa1 stopC$ 804

Cheap Flights from London to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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 round-trip flight deals from London to Ontario

Thu, 3 Sep - Wed, 23 Sep
Air Transat Logo
11:35 a.m. - 8:13 a.m.
LGW
-
YYZ
25h 38m
1 stop
Air Transat Logo
11:15 p.m. - 9:50 a.m.
YYZ
-
LGW
29h 35m
1 stop
C$ 759Air Transat
Sun, 4 Oct - Sat, 10 Oct
Air Transat Logo
12:40 p.m. - 12:37 a.m.
LGW
-
YUL
16h 57m
1 stop
Air Transat Logo
4:15 p.m. - 10:45 a.m.
YUL
-
LGW
13h 30m
1 stop
C$ 761Air Transat
Sat, 29 Aug - Fri, 11 Sep
Air Transat Logo
9:40 a.m. - 12:45 p.m.
LGW
-
YYZ
8h 05mdirect
Air Transat Logo
10:45 p.m. - 10:45 a.m.
YYZ
-
LGW
7h 00mdirect
C$ 761Air Transat
Mon, 24 Aug - Mon, 31 Aug
Icelandair Logo
3:40 p.m. - 7:10 p.m.
LGW
-
YYZ
32h 30m
1 stop
Icelandair Logo
11:10 p.m. - 2:40 p.m.
YYZ
-
LGW
10h 30m
1 stop
C$ 762Icelandair
Sun, 20 Sep - Fri, 25 Sep
Air Transat Logo
12:40 p.m. - 12:37 a.m.
LGW
-
YUL
16h 57m
1 stop
Air Transat Logo
5:00 p.m. - 10:45 a.m.
YUL
-
LGW
12h 45m
1 stop
C$ 762Air Transat
Sat, 17 Oct - Sun, 25 Oct
Air Transat Logo
9:40 a.m. - 5:02 p.m.
LGW
-
YUL
12h 22m
1 stop
Air Transat Logo
2:15 p.m. - 9:45 a.m.
YUL
-
LGW
15h 30m
1 stop
C$ 763Air Transat
Sat, 22 Aug - Sat, 12 Sep
Air Transat Logo
11:35 a.m. - 6:28 p.m.
LGW
-
YYZ
11h 53m
1 stop
Air Transat Logo
6:10 p.m. - 9:50 a.m.
YYZ
-
LGW
10h 40m
1 stop
C$ 763Air Transat
Sun, 4 Oct - Sun, 18 Oct
Multiple Airlines Logo
6:00 p.m. - 11:35 a.m.
LGW
-
YUL
22h 35m
1 stop
Multiple Airlines Logo
6:50 p.m. - 7:25 a.m.
YUL
-
LGW
31h 35m
1 stop
C$ 766Multiple Airlines
Wed, 26 Aug - Sun, 30 Aug
Multiple Airlines Logo
10:00 p.m. - 3:00 p.m.
LGW
-
YYZ
22h 00m
2 stops
Multiple Airlines Logo
6:20 p.m. - 9:25 a.m.
YYZ
-
LGW
10h 05m
1 stop
C$ 769Multiple Airlines
Sun, 13 Sep - Tue, 22 Sep
WestJet Logo
10:45 a.m. - 7:50 p.m.
LGW
-
YKF
38h 05m
2 stops
WestJet Logo
8:40 p.m. - 9:25 a.m.
YKF
-
LGW
31h 45m
2 stops
C$ 1,713WestJet
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 round-trip flight from London Gatwick Airport to Region of Ontario?

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

Flight prices are below average for this route right now.

Flights to Region of Ontario from London Gatwick Airport usually cost between C$ 996 and C$ 1,298 in September.
The lowest price found in the past 5 days was C$ 759 on Air Transat (3 Sep–23 Sep).

What is the cheapest London Gatwick Airport 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 Gatwick Airport found in the last 5 days was to Ottawa, at C$ 755 round-trip. The most popular route is from London Gatwick Airport (LGW) to Toronto Pearson Intl Airport (YYZ), and the cheapest round-trip airline ticket found on this route in the last 5 days was C$ 766.

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

The average price for all round-trip flights from London Gatwick Airport 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 morning, when round-trip flights cost C$ 1,007 on average. The most expensive time of day to fly to Ontario is generally in the morning, which is peak travel time and where the average cost of a ticket is C$ 1,007.

Can I save money by flying with a layover from London Gatwick Airport to Ontario?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at C$ 782 on average.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Gatwick Airport 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 Gatwick Airport to Ontario is February, when tickets cost C$ 716 (return) on average. On the other hand, the most expensive months are August and December, when the average cost of round-trip tickets is C$ 1,144 and C$ 1,142 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 Gatwick Airport 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 Saturday and more expensive on a Monday. On your return trip to London, you should consider flying back on a Friday, and avoid Tuesdays for better deals.

How far in advance should I book a flight from London Gatwick Airport 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 Gatwick Airport 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 Gatwick Airport to Ontario, you should book around 2 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low season

January

Cheapest flight

C$ 397
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (15% more expensive on average)
Flight from London Gatwick Airport to Ottawa

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 round-trip 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.

Top tips for finding cheap flights to Ontario

  • Looking for a cheap flight? 25% of our users found tickets from London to the following destinations at these prices or less: Ottawa C$ 675 one-way - C$ 1,124 round-trip; Montreal C$ 559 one-way - C$ 942 round-trip; Toronto C$ 560 one-way - C$ 869 round-trip

Reviews of the top airline 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 567 reviews
7.3Comfort
8.0Boarding
7.1Entertainment
6.8Food
8.5Crew
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.

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

Information on your arrival and departure airports