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Cheap flights from Ontario to London Heathrow Airport from C$ 355

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
23 Aug — 30 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 24 July 2026.

Mon 12/104:00 p.m.
YOW
-
LHR
2 stops34h 55m
Multiple Airlines
Thu 15/106:00 a.m.
LHR
-
YOW
2 stops21h 10m
Multiple Airlines
Deal found 21/7C$ 739
Fri 20/119:45 p.m.
YUL
-
LHR
1 stop18h 50m
TAP AIR PORTUGAL
Fri 27/116:00 a.m.
LHR
-
YUL
1 stop18h 55m
TAP AIR PORTUGAL
Deal found 19/7C$ 752
Mon 19/105:45 p.m.
YYZ
-
LHR
1 stop11h 35m
TAP AIR PORTUGAL
Mon 26/106:30 p.m.
LHR
-
YYZ
1 stop25h 50m
TAP AIR PORTUGAL
Deal found 20/7C$ 755
Fri 20/119:45 p.m.
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Fri 4/1212:25 p.m.
LHR
-
YUL
1 stop12h 30m
TAP AIR PORTUGAL
Deal found 21/7C$ 755
Wed 14/1010:55 p.m.
YYZ
-
LHR
1 stop13h 50m
TAP AIR PORTUGAL
Fri 23/106:00 a.m.
LHR
-
YYZ
1 stop14h 00m
TAP AIR PORTUGAL
Deal found 19/7C$ 757
Wed 21/105:35 p.m.
YYZ
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Tue 27/106:00 a.m.
LHR
-
YYZ
1 stop14h 20m
TAP AIR PORTUGAL
Deal found 20/7C$ 759
Wed 18/1110:45 p.m.
YYZ
-
LHR
1 stop15h 10m
TAP AIR PORTUGAL
Wed 25/116:00 a.m.
LHR
-
YYZ
1 stop20h 15m
TAP AIR PORTUGAL
Deal found 21/7C$ 760
Mon 5/105:45 p.m.
YYZ
-
LHR
1 stop11h 35m
TAP AIR PORTUGAL
Thu 15/1011:20 a.m.
LHR
-
YYZ
1 stop15h 05m
TAP AIR PORTUGAL
Deal found 23/7C$ 762
Sun 27/910:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Wed 7/106:45 p.m.
LHR
-
YUL
1 stop31h 25m
TAP AIR PORTUGAL
Deal found 19/7C$ 762
Wed 30/95:35 p.m.
YYZ
-
LHR
1 stop17h 00m
TAP AIR PORTUGAL
Wed 14/108:00 a.m.
LHR
-
YYZ
1 stop18h 05m
TAP AIR PORTUGAL
Deal found 23/7C$ 763
Fri 23/107:25 p.m.
YTZ
-
LHR
1 stop11h 30m
United Airlines
Sun 25/1011:05 a.m.
LHR
-
YTZ
2 stops55h 32m
United Airlines
Deal found 19/7C$ 764
Fri 9/105:30 p.m.
YUL
-
LHR
1 stop13h 20m
Multiple Airlines
Sun 11/108:55 a.m.
LHR
-
YUL
2 stops35h 05m
Multiple Airlines
Deal found 22/7C$ 764

Find flight deals from Ontario to Heathrow

Keep the following information in mind while searching for Ontario to Heathrow flight deals. Data was last updated 24 July 2026.

Round-trip from

C$ 739

One-way from

C$ 355

Popular in

December

Cheapest in

February

Average price

C$ 1,168

Good round-trip deal

C$ 908 or less

Good one-way deal

C$ 489 or less
Air Canada
  • Air Canada
  • 12/10-15/10
  • 4 total stops
  • 56h 05m total
  • Ontario to London
Search Deals
6/9
  • 6/9
  • 2 total stops
  • 29h 55m total
  • Ontario to London
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Ontario to London Heathrow.
Search Deals
Price to beat on a one-way flight from Ontario to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 24 July 2026.
Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 2/10

11:10 p.m.-8:20 p.m.

1 stop16h 10m

London Heathrow

Tue 3/11

8:35 p.m.-6:15 p.m.

1 stop26h 40m

C$ 828

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 24/10

2:00 p.m.-12:05 p.m.

2 stops17h 05m

London Heathrow

Mon 26/10

11:05 a.m.-1:11 p.m.

2 stops54h 06m

C$ 880

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 23/10

2:00 p.m.-11:55 a.m.

2 stops16h 55m

London Heathrow

Sun 25/10

11:05 a.m.-1:11 p.m.

2 stops54h 06m

C$ 880

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 30/9

10:55 p.m.-11:10 a.m.

Nonstop7h 15m

London Heathrow

Wed 14/10

6:30 a.m.-1:20 p.m.

1 stop11h 50m

C$ 891

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 9/9

10:55 p.m.-11:10 a.m.

Nonstop7h 15m

London Heathrow

Wed 16/9

5:50 p.m.-8:40 p.m.

Nonstop7h 50m

C$ 898

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 9/10

10:55 p.m.-11:10 a.m.

Nonstop7h 15m

London Heathrow

Sun 11/10

5:45 p.m.-8:35 p.m.

Nonstop7h 50m

C$ 898

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 3/9

10:55 p.m.-11:10 a.m.

Nonstop7h 15m

London Heathrow

Wed 9/9

5:50 p.m.-8:40 p.m.

Nonstop7h 50m

C$ 900

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 30/10

7:20 p.m.-12:00 p.m.

1 stop12h 40m

London Heathrow

Sat 7/11

11:10 a.m.-6:19 p.m.

1 stop12h 09m

C$ 926

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 1/9

5:05 p.m.-12:05 p.m.

1 stop14h 00m

London Heathrow

Thu 12/11

6:30 a.m.-3:40 p.m.

1 stop14h 10m

C$ 933

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 29/8

9:30 a.m.-6:20 a.m.

1 stop15h 50m

London Heathrow

Sat 5/9

8:55 a.m.-3:05 p.m.

1 stop11h 10m

C$ 942

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to London Heathrow Airport

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

Currently, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 847). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of C$ 1,337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ON to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 24 July 2026.

When flying from Region of Ontario to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Region of Ontario to London Heathrow Airport

Explore weekly flight availability from Ontario to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 24 July 2026.

The most flights from CAON to LHR are scheduled on a Thursday (46 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (30 on average).

How much does it cost to fly round-trip from Region of Ontario to London Heathrow Airport?

Airfare is below average for this route at the moment.
Region of Ontario to London Heathrow Airport flights typically cost between C$ 1,064 and C$ 1,386 in October.
The cheapest round-trip price found within the last 5 days was C$ 755 on TAP AIR PORTUGAL (19 Oct-26 Oct).

How far ahead should I book a flight from Region of Ontario to London Heathrow Airport?

To ensure you get the cheapest price possible for a flight from Region of Ontario to London Heathrow Airport, you should look to book at least 48 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to London Heathrow Airport?

    A quick flight from Region of Ontario to London Heathrow Airport can take about 7h 15m. Icelandair provides one of the quickest options available for as low as C$ 891. The distance between Region of Ontario and London Heathrow Airport is about 5702 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Region of Ontario to London Heathrow Airport one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as C$ 308. However, be on the lookout for offers from Air Canada and Lufthansa, as they are both options that can get you from Region of Ontario to London Heathrow Airport for a low price.

  • What are the most popular routes from Region of Ontario to London Heathrow Airport?

    The most popular flight routes from Region of Ontario to London Heathrow Airport are Toronto Pearson Intl - London Heathrow, Toronto Island - London Heathrow and Montreal Pierre Elliott Trudeau Intl - London Heathrow.

  • What are the most reliable airlines from Region of Ontario to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing Singapore Airlines (87%), KLM (86%) or Air France (86%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Region of Ontario to London Heathrow Airport?

    On average you can expect to pay C$ 2,230 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 502 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 745.

  • Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

    Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.

  • Can I find deals for business class flights from Ontario to Heathrow?

    Yes. Cheapflights offers flight deals from Ontario to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

    Currently, February is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 847). Flying from Region of Ontario to London Heathrow Airport in December is currently the most expensive (average of C$ 1,337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Leamington Spa
Northampton
Watford
High Wycombe
Stratford-upon-Avon
Moreton-in-Marsh

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Heathrow flights
Vancouver Intl to Heathrow flights
Pearson Intl to Gatwick flights
Pearson Intl to London City flights
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Pearson Intl to Stansted flights
Toronto Island to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to Luton flights
Toronto Island to Gatwick flights
Vancouver Intl to Stansted flights
Vancouver Intl to London City flights
Calgary to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Halifax to Heathrow flights
Abbotsford to Heathrow flights
Pierre Elliott Trudeau Intl to Stansted flights
Pierre Elliott Trudeau Intl to London City flights
Ottawa to Heathrow flights
Pierre Elliott Trudeau Intl to Luton flights
Calgary to Gatwick flights
Calgary to London City flights
Edmonton to Heathrow flights
Calgary to Luton flights
Halifax to Gatwick flights
Pierre Elliott Trudeau Intl to Southend flights
Calgary to Stansted flights
Edmonton to Gatwick flights
Ottawa to Gatwick flights
Vancouver Intl to Luton flights
Halifax to Stansted flights
Edmonton to London City flights
Halifax to London City flights
Edmonton to Stansted flights
Ottawa to London City flights
Halifax to Luton flights
Ottawa to Stansted flights
Winnipeg to Heathrow flights
Saskatoon to Heathrow flights
Abbotsford to Gatwick flights
Winnipeg to Gatwick flights
Victoria to Heathrow flights
Québec City to Heathrow flights
Québec City to Gatwick flights
Saskatoon to Gatwick flights
Victoria to Gatwick flights
St. John's to Gatwick flights
Québec City to Stansted flights

Top 10 airlines flying from Ontario to Heathrow

Discover the top 10 airlines that operate flights from Ontario to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 24 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 605AverageC$ 984FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
TAP AIR PORTUGALCheapestC$ 612AverageC$ 831FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapestC$ 666AverageC$ 767FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapestC$ 723AverageC$ 991FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
British AirwaysCheapestC$ 737AverageC$ 1,012FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapestC$ 743AverageC$ 957FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapestC$ 760AverageC$ 935FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapestC$ 767AverageC$ 1,137FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 770AverageC$ 1,126FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapestC$ 793AverageC$ 1,004FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Heathrow?

Cheapflights helps you search for flights from Ontario to Heathrow via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Ontario to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

Yes! Start tracking prices for Ontario to Heathrow flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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