£170 Find Cheap Flights from Ontario to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 24/9. 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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Cheap Flight Deals from Ontario to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Ontario to Heathrow 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.

Recent return flight deals from Ontario to Heathrow

KAYAK's recommended return flight deals from the most popular airlines that fly from Ontario to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
Icelandair Logo
23:00 - 11:55YYZ-LHR
31h 55m1 stop
Icelandair Logo
21:25 - 21:55LHR-YYZ
29h 30m1 stop
£345Icelandair
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Sat, 7 Jun - Sat, 14 Jun
TAP AIR PORTUGAL Logo
17:50 - 10:20YYZ-LHR
11h 30m1 stop
TAP AIR PORTUGAL Logo
19:50 - 13:55LHR-YYZ
23h 05m1 stop
£345TAP AIR PORTUGAL
Find Deal
Mon, 29 Sep - Tue, 14 Oct
Air Canada Logo
10:20 - 06:30YTZ-LHR
15h 10m2 stops
Air Canada Logo
08:40 - 17:46LHR-YTZ
14h 06m2 stops
£354Air Canada
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Sun, 8 Jun - Mon, 23 Jun
Air Canada Logo
10:25 - 06:30YTZ-LHR
15h 05m1 stop
Air Canada Logo
08:40 - 19:46LHR-YTZ
16h 06m2 stops
£355Air Canada
Find Deal
Sun, 8 Jun - Mon, 23 Jun
 Logo
16:00 - 06:30YYZ-LHR
9h 30m1 stop
 Logo
06:30 - 19:45LHR-YYZ
18h 15m1 stop
Mon, 19 May - Sun, 8 Jun
 Logo
18:20 - 06:35YYZ-LHR
7h 15mdirect
 Logo
17:40 - 20:30LHR-YYZ
7h 50mdirect
Fri, 23 May - Tue, 3 Jun
Lufthansa Logo
16:00 - 06:30YYZ-LHR
9h 30m1 stop
Lufthansa Logo
08:30 - 11:20LHR-YYZ
7h 50mdirect
£403Lufthansa
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Fri, 23 May - Wed, 28 May
Lufthansa Logo
22:25 - 10:00YUL-LHR
6h 35mdirect
Lufthansa Logo
09:30 - 11:40LHR-YUL
7h 10mdirect
£406Lufthansa
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Sat, 24 May - Sat, 7 Jun
British Airways Logo
18:05 - 06:15YYZ-LHR
7h 10mdirect
British Airways Logo
13:10 - 23:28LHR-YYZ
15h 18m1 stop
£422British Airways
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Thu, 12 Jun - Wed, 18 Jun
British Airways Logo
22:05 - 09:45YUL-LHR
6h 40mdirect
British Airways Logo
18:05 - 20:15LHR-YUL
7h 10mdirect
£426British Airways
Find Deal
Thu, 29 May - Mon, 2 Jun
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Good to know - Cheap tickets from Ontario to London Heathrow Airport

Low season

January

High season

July

Cheapest flight

£170
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly (22% more expensive on average)
Flight from Montreal to London Heathrow Airport

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

Insights shared by verified travellers who flew the route from Ontario to Heathrow 
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.
AnkushFlew with Air CanadaYYZ-LHRSept 2024
My luggage didn’t arrive to Delhi from Toronto. It took 4 days for the airline to get me the bags when I followed up several times. This could be made more efficient with tracking or something. A
Verified travelerFlew with British AirwaysYYZ-LHRNov 2024
Whatever you do - do NOT go anywhere near the cheapy airlines - BA & Air Canada are both decent albeit the seats in economy are painfully basic
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 LufthansaYYZ-LHRMay 2024
Flights to London UK out of Toronto are half the cost of flights from Detroit
Verified travelerFlew with LufthansaYYZ-LHRMay 2024
Bring water and less luggage on board if possible.
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

FAQs for booking Ontario to London Heathrow Airport flights

  • How does KAYAK find such low prices on flights from Ontario to London Heathrow Airport?

    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 Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from 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 Ontario to London Heathrow Airport?

    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 Heathrow Airport 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 Heathrow Airport?

    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 Heathrow Airport 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 Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Luton
Swindon
Northampton
Southend-on-Sea
Winchester
Croydon
Slough
Stansted
Poole
Chichester
Maidstone
Folkestone
Salisbury
Colchester
Crawley
Chelmsford
Hastings

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

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