£142 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 1/10. 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

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Cheap Flights from Ontario to London

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

So, 21 Sep - Mi, 1 Okt
SWISS Logo
16:35 - 07:55YYZ-LHR
10h 20m1 stop
SWISS Logo
18:40 - 12:50LHR-YYZ
23h 10m1 stop
£237SWISS
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Di, 7 Okt - Sa, 18 Okt
 Logo
23:55 - 14:20YYZ-STN
9h 25m1 stop
 Logo
06:35 - 15:50STN-YYZ
14h 15m1 stop
Mi, 13 Aug - Mi, 27 Aug
 Logo
17:20 - 08:10YYZ-LTN
9h 50m1 stop
 Logo
10:00 - 15:50LTN-YYZ
10h 50m1 stop
Mo, 10 Nov - Fr, 21 Nov
TAP AIR PORTUGAL Logo
21:45 - 22:40YUL-LHR
19h 55m1 stop
TAP AIR PORTUGAL Logo
08:15 - 20:15LHR-YUL
17h 00m1 stop
£354TAP AIR PORTUGAL
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Mi, 5 Nov - Mo, 17 Nov
TAP AIR PORTUGAL Logo
21:45 - 15:30YUL-LHR
12h 45m1 stop
TAP AIR PORTUGAL Logo
08:15 - 20:15LHR-YUL
17h 00m1 stop
£355TAP AIR PORTUGAL
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Di, 4 Nov - Di, 11 Nov
Icelandair Logo
19:45 - 10:55YYZ-LGW
10h 10m1 stop
Icelandair Logo
11:55 - 18:15LGW-YYZ
11h 20m1 stop
£358Icelandair
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Mi, 19 Nov - Mi, 3 Dez
Icelandair Logo
19:45 - 19:30YYZ-LHR
18h 45m1 stop
Icelandair Logo
20:35 - 18:15LHR-YYZ
26h 40m1 stop
£359Icelandair
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Do, 4 Sep - Di, 9 Sep
Air Transat Logo
20:05 - 10:45YUL-LGW
9h 40m1 stop
Air Transat Logo
11:35 - 14:15LGW-YUL
7h 40mdirect
£359Air Transat
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Mi, 3 Sep - Mi, 10 Sep
Air Transat Logo
20:05 - 07:55YUL-LGW
30h 50m1 stop
Air Transat Logo
09:40 - 19:20LGW-YUL
14h 40m1 stop
£360Air Transat
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Mi, 19 Nov - Sa, 22 Nov
Austrian Airlines Logo
18:30 - 08:20YYZ-LHR
32h 50m1 stop
Austrian Airlines Logo
06:00 - 14:25LHR-YYZ
37h 25m2 stops
£360Austrian Airlines
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Good to know - Cheap tickets from Ontario to London

Low seasonJanuary
High seasonJuly
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (4% more expensive on average)

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

Insights shared by verified travellers who flew the route from Ontario to London 
CFlew with Air CanadaYYZ-LHRFeb 2025
Flying from Toronto to London is a long-haul journey, but with the right preparation, it can be a smooth and enjoyable experience. Here are some tips to make your trip more comfortable: Choose the Right Flight – If possible, book an overnight flight (a "red-eye"). This allows you to sleep on the plane and arrive in London in the morning, helping with jet lag. Pack Smart – London’s weather can be unpredictable, so bring layers and a compact umbrella. Also, keep essentials like a travel adapter and charger in your carry-on. Use Luggage Tracking – If flying Air Canada, take advantage of their luggage tracking feature for peace of mind, knowing your bags are on the same flight as you. Stay Hydrated & Bring Snacks – Airplane cabins can be dry, so drink plenty of water. While airlines provide meals, it’s always a good idea to have extra snacks. Manage Jet Lag – Adjust your sleep schedule before departure and try to stay awake until nighttime in London to quickly adapt to the new time zone. Transportation on Arrival – Heathrow and Gatwick have great transport links. The Heathrow Express is the fastest way into central London, while the Tube (Piccadilly Line) is more budget-friendly. Have Your Documents Ready – Ensure your passport is valid, and if required, have your visa or travel authorization (e.g., an ETA for UK entry). With the right prep, your journey will be smooth and enjoyable.
Mohamed ImranFlew with Air TransatYYZ-LGWSept 2024
Pack food for yourself before boarding Air Transat. Blankets, pillows and headphones are not given for free.
GerhardFlew with British AirwaysYYZ-LHRJun 2024
the lounge is nice. Although the crew at check in will say there are no showers, there are! Check the board for delays
CatherineFlew with LufthansaYYZ-LHRMay 2024
Pack light to avoid checked bag fees and then volunteer to place the carry on bag in the hold for no extra cost.
Verified travelerFlew with Air CanadaYYZ-LHRMay 2024
Keep in mind the security gate post security as you cannot return back if you happened to miss collecting all your items
Verified travelerFlew with LufthansaYYZ-LHRMay 2024
Bring water and less luggage on board if possible.

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 return 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Luton
Southend-on-Sea
Winchester
Slough
Croydon
Stansted
Folkestone
Chichester
Maidstone
Colchester
Chelmsford
Crawley
Bedford
Hastings
Watford
Basingstoke
Royal Tunbridge Wells

Everything you need to know for your flight to London

Cabin class types available on flights to Ontario

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

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