£211 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 8/2. 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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Everything you should know

Cheapest return fare
£423
Multiple Airlines
Tue 13/1Fri 23/1
YYZ - STN • 1 stop
Cheapest direct flights
£425
Typical prices: £369-£453
Air Transat
Thu 15/1Sun 17/5
YYZ - LGW • Direct
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Flight Deals
Useful Info
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 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

Tue, 13 Jan - Fri, 23 Jan
Multiple Airlines Logo
17:25 - 09:50
YYZ
-
STN
11h 25m1 stop
Multiple Airlines Logo
06:30 - 15:55
STN
-
YYZ
14h 25m1 stop
£423Multiple Airlines
Wed, 6 May - Sat, 16 May
Icelandair Logo
20:45 - 20:20
YYZ
-
LHR
18h 35m1 stop
Icelandair Logo
21:25 - 22:10
LHR
-
YYZ
29h 45m1 stop
£424Icelandair
Wed, 20 May - Sun, 24 May
WestJet Logo
17:35 - 09:15
YYZ
-
LGW
10h 40m1 stop
WestJet Logo
10:35 - 17:00
LGW
-
YYZ
11h 25m1 stop
£424WestJet
Mon, 12 Jan - Sun, 18 Jan
Air Canada Logo
18:10 - 06:30
YYZ
-
LHR
7h 20mdirect
Air Canada Logo
12:00 - 20:46
LHR
-
YYZ
13h 46m1 stop
£425Air Canada
Thu, 15 Jan - Sun, 17 May
Air Transat Logo
21:35 - 09:45
YYZ
-
LGW
7h 10mdirect
Air Transat Logo
12:40 - 15:40
LGW
-
YYZ
8h 00mdirect
£425Air Transat
Mon, 26 Jan - Tue, 10 Feb
Multiple Airlines Logo
22:45 - 18:40
YYZ
-
STN
14h 55m1 stop
Multiple Airlines Logo
05:55 - 15:20
STN
-
YYZ
14h 25m1 stop
£425Multiple Airlines
Sun, 24 May - Sun, 7 Jun
WestJet Logo
18:20 - 09:05
YYZ
-
LGW
9h 45m1 stop
WestJet Logo
10:35 - 17:00
LGW
-
YYZ
11h 25m1 stop
£426WestJet
Tue, 3 Feb - Tue, 10 Feb
Air Canada Logo
23:00 - 11:20
YYZ
-
LHR
7h 20mdirect
Air Canada Logo
09:00 - 16:05
LHR
-
YYZ
12h 05m1 stop
£426Air Canada
Tue, 13 Jan - Mon, 19 Jan
Aer Lingus Logo
17:25 - 08:05
YYZ
-
LHR
9h 40m1 stop
Aer Lingus Logo
09:50 - 15:55
LHR
-
YYZ
11h 05m1 stop
£429Aer Lingus
Tue, 21 Apr - Thu, 30 Apr
Air Transat Logo
22:35 - 10:45
YYZ
-
LGW
7h 10mdirect
Air Transat Logo
12:40 - 16:00
LGW
-
YYZ
8h 20mdirect
£430Air Transat
Useful Info

Good to know - Cheap tickets from Ontario to London

Low seasonNovember
Cheapest flight£217
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly (2% more expensive on average)
Flight from Toronto Pearson Airport to London Heathrow Airport

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 Canada
YYZ
-
LHR
Feb 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 Transat
YYZ
-
LGW
Sept 2024
Pack food for yourself before boarding Air Transat. Blankets, pillows and headphones are not given for free.
GerhardFlew with British Airways
YYZ
-
LHR
Jun 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 Lufthansa
YYZ
-
LHR
May 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 Canada
YYZ
-
LHR
May 2024
Keep in mind the security gate post security as you cannot return back if you happened to miss collecting all your items
IwonaFlew with Air Canada
YYZ
-
LHR
Apr 2024
Pack in ur carryon bag and don’t waste ur money to pay for check in
Verified travelerFlew with Lufthansa
YYZ
-
LHR
May 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
Hounslow
Luton
Southend-on-Sea
Slough
Winchester
Croydon
Stansted
Folkestone
Chichester
Maidstone
Colchester
Chelmsford
Crawley
Richmond
Bedford
Watford
Hastings

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.