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C$ 265 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 to London departing on 20/4. 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

Cheap Flights from Ontario to London

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

Fri, 10 Apr - Sun, 19 Apr
Air Canada Logo
4:15 p.m. - 5:04 p.m.
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0h 49mdirect
Air Canada Logo
5:40 p.m. - 6:29 p.m.
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0h 49mdirect
C$ 514Air Canada
Thu, 16 Apr - Thu, 23 Apr
Air Canada Logo
4:15 p.m. - 5:04 p.m.
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YXU
0h 49mdirect
Air Canada Logo
5:40 p.m. - 6:29 p.m.
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0h 49mdirect
C$ 516Air Canada
Sun, 19 Apr - Sun, 26 Apr
Air Canada Logo
4:15 p.m. - 5:04 p.m.
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YXU
0h 49mdirect
Air Canada Logo
5:10 a.m. - 6:03 a.m.
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YYZ
0h 53mdirect
C$ 523Air Canada
Sat, 16 May - Fri, 22 May
Air Canada Logo
10:55 a.m. - 11:43 a.m.
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-
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0h 48mdirect
Air Canada Logo
6:10 p.m. - 6:58 p.m.
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YYZ
0h 48mdirect
C$ 532Air Canada
Sat, 12 Sep - Wed, 23 Sep
Air Canada Logo
4:55 p.m. - 5:45 p.m.
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-
YXU
0h 50mdirect
Air Canada Logo
5:40 a.m. - 6:26 a.m.
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YYZ
0h 46mdirect
C$ 556Air Canada
Sat, 2 May - Sat, 9 May
Air Canada Logo
8:05 a.m. - 8:53 a.m.
YYZ
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0h 48mdirect
Air Canada Logo
6:10 p.m. - 6:58 p.m.
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YYZ
0h 48mdirect
C$ 557Air Canada
Sun, 31 May - Tue, 30 Jun
Air Canada Logo
4:45 p.m. - 5:33 p.m.
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0h 48mdirect
Air Canada Logo
6:10 p.m. - 6:58 p.m.
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YYZ
0h 48mdirect
C$ 562Air Canada
Fri, 12 Jun - Wed, 17 Jun
WestJet Logo
8:00 p.m. - 5:20 a.m.
YUL
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9h 20m
1 stop
WestJet Logo
6:10 a.m. - 7:05 a.m.
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YUL
24h 55m
1 stop
C$ 654WestJet
Tue, 28 Apr - Sun, 3 May
WestJet Logo
8:00 p.m. - 5:20 a.m.
YUL
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9h 20m
1 stop
WestJet Logo
6:10 a.m. - 7:05 a.m.
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YUL
24h 55m
1 stop
C$ 705WestJet
Fri, 12 Jun - Sun, 21 Jun
Multiple Airlines Logo
8:25 a.m. - 5:20 a.m.
YTZ
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20h 55m
2 stops
Multiple Airlines Logo
5:55 p.m. - 10:00 p.m.
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YTZ
28h 05m
3 stops
C$ 922Multiple Airlines
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Good to know

Low seasonJanuary
Cheapest flightC$ 265
Best time to beat the crowds (14% less expensive on average)
Flight from Toronto Pearson Airport to London

FAQs for booking flights from Ontario to London

  • 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.

Reviews of the top airlines flying from Ontario to London

 
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.
7.2
WestJetOverall score based on 3300 reviews
7.4Boarding
7.9Crew
6.2Food
6.1Entertainment
7.0Comfort
Airline reviews

I wasn’t able to book or pay for a seat and they forgot to check me in for my third flight so I spent 24 hours in Toronto waiting for another one.

6.0 GoodWendy, Mar 2026
YYC - YYZ
Read more WestJet reviews

I wasn’t able to book or pay for a seat and they forgot to check me in for my third flight so I spent 24 hours in Toronto waiting for another one.

Took 3 hours to check in and drop off our suitcases. Half of the passengers were still in line by boarding time. The computer systems and staff were very slow. Staff were also disorganized and kept allowing later flights to skip lines. Suitcases were piling on that several other passengers didn't get their suitcases. Then, we were sitting in the plane for 2 hours and were told that the flight was overbooked. We missed our connecting flight and had to fly the following day but with a stop over. Good thing ONE WestJet customer rep was pleasant and actually knew how to do her job when we wanted to rebook to a direct flight. Thank you to Kim at Toronto airport. Terrible experience at PUJ. Won't go back to Dominican Republic.

I like the wider seats, Plus lots of legroom, Lacking entertainment, no tv or screen to play with

There is no snack and nit much that would be considered gluten free in yiur food selections. One of your snacks should be a gluten free cookie or small bar etc. maybe it was me but I didn’t see any free movies just internet connection and YouTube .

The keg from Edmonton to Toronto My wife found it very cold. Other than that great flight.

No dogs! Can we have no dogs in the cabin? Why was there a yappy little dog behind me? Lucky I had ear plugs. Sorry for others without

Good value, minor delay due to waiting for inbound plane but they gave accurate information about wait time. Able to switch to a seat by my husband thanks to a kind flight attendant

Arrival at Comox from, London,ON 6 hours later... No bueano

Flight itself good .Landing at terminal3 and connections to terminal1,it is connections nightmare,specially for disable person

The seats very Uncomfortable, no meal and no entertainment for a 4Hours flight. Smooth Flight, Great Take off and landing. Superb crew!

Other than flights being cancelled and 3.5 hours late causing missed connections it was ok.

The plane was almost an hour delayed and then once we were on board, they said that captain didn’t have enough hours left in his day to fly us so they had to find another captain. Surely that could’ve been figured out out in advance. Incredibly frustrating because I missed my connection in Toronto, and it has a result missed the first day of my conference in Charlotte, North Carolina.

Flight from saskatoon to toronto was by far the worst flight ive ever been on and roughest landing ever.

Mechanical issue caused me to be stuck in Vancouver for 2 days

The on-board entertainment system was horrible - we gave up watching because it just kept glitching.

Had to cancel the flight because there was a 14 hour layover before the flight. Unacceptable.

I wish Air Canada would provide a meal on the 5 hrs or more time flight to the passengers.

Terrible… Luggage’s missing for 5-days. Not expedited despite notifying them that insulin and ozempic were in bags and required refrigeration. I’m extremely disappointed. Meds were useless upon delivery as ice pack had dissolved and meds were warm and not useable because their efficacy and potency are now questionable . I’m so disappointed and expecting a full refund for the checked in bags.

Very bed experience never want to travel air canada anymore

I travelled in Business class for the first time and wish I could do that again.

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