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Cheap flights from Ontario to London Heathrow Airport from C$ 401

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 31/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
3 Apr — 10 Apr1
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 4 March 2026.

Mon 20/410:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Tue 28/47:50 p.m.
LHR
-
YUL
1 stop29h 55m
TAP AIR PORTUGAL
Deal found 28/2C$ 684
Fri 5/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Sat 20/67:50 p.m.
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 27/2C$ 691
Mon 1/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Mon 8/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 27/2C$ 692
Sun 31/510:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Fri 12/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 27/2C$ 694
Fri 5/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Mon 8/611:20 a.m.
LHR
-
YUL
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 28/2C$ 695
Wed 27/510:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Mon 15/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 27/2C$ 698
Wed 3/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Thu 11/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 28/2C$ 699
Wed 3/610:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Wed 10/61:45 p.m.
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 28/2C$ 700
Wed 10/610:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Thu 18/67:50 p.m.
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 1/3C$ 703
Fri 5/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Tue 16/67:50 p.m.
LHR
-
YUL
1 stop29h 55m
TAP AIR PORTUGAL
Deal found 1/3C$ 705
Wed 1/411:10 p.m.
YYZ
-
LHR
1 stop31h 45m
Icelandair
Fri 24/49:25 p.m.
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 4/3C$ 706
Sun 12/48:45 p.m.
YYZ
-
LHR
1 stop18h 35m
Icelandair
Sun 26/49:25 p.m.
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 4/3C$ 707

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 4 March 2026.

Round-trip from

C$ 684

One-way from

C$ 401

Popular in

December

Cheapest in

May

Average price

C$ 795

Good round-trip deal

C$ 921 or less

Good one-way deal

C$ 625 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 20/4-28/4
  • 2 total stops
  • 43h 55m total
  • Ontario to London
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 31/5
  • 1 total stop
  • 18h 15m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 4 March 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

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 9/4

4:00 p.m.-6:30 a.m.

1 stop9h 30m

London Heathrow

Sat 18/4

12:40 p.m.-6:29 p.m.

1 stop10h 49m

C$ 795

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 12/4

8:45 p.m.-11:55 a.m.

1 stop10h 10m

London Heathrow

Mon 27/4

9:25 p.m.-7:10 p.m.

1 stop26h 45m

C$ 815

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 26/3

11:05 p.m.-10:10 a.m.

Nonstop7h 05m

London Heathrow

Thu 9/4

9:45 a.m.-5:43 p.m.

1 stop12h 58m

C$ 836

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 31/3

4:44 p.m.-10:30 a.m.

1 stop12h 46m

London Heathrow

Sun 5/4

1:15 p.m.-4:05 p.m.

Nonstop7h 50m

C$ 839

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 22/3

8:05 p.m.-10:25 a.m.

1 stop10h 20m

London Heathrow

Mon 30/3

12:15 p.m.-10:23 p.m.

2 stops15h 08m

C$ 841

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 9/5

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

Nonstop7h 15m

London Heathrow

Sat 16/5

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

Nonstop7h 50m

C$ 843

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 26/5

6:05 a.m.-6:55 a.m.

2 stops19h 50m

London Heathrow

Sun 7/6

6:50 a.m.-11:54 p.m.

2 stops22h 04m

C$ 844

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Tue 14/4

6:10 p.m.-6:55 a.m.

2 stops31h 45m

London Heathrow

Tue 21/4

12:15 p.m.-8:09 p.m.

2 stops36h 54m

C$ 852

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 16/3

11:30 p.m.-10:50 a.m.

Nonstop7h 20m

London Heathrow

Tue 31/3

10:45 a.m.-10:39 p.m.

1 stop16h 54m

C$ 858

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 18/4

12:05 p.m.-6:55 a.m.

2 stops13h 50m

London Heathrow

Mon 4/5

12:15 p.m.-10:23 p.m.

2 stops15h 08m

C$ 865

Flights are sorted by cheapest round-trip flights first.

Deals found on 27/2

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, May is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 666). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 904). 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 4 March 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.

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

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 05m. Lufthansa provides one of the quickest options available for as low as C$ 836. 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 WestJet, with whom users have recently found tickets for as low as C$ 60. However, be on the lookout for offers from TAP AIR PORTUGAL and Air Transat, 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 SriLankan Airlines (70%), American Airlines (70%) or Aer Lingus (70%) 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$ 1,969 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 519 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 703.

  • 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, May is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 666). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 904). 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
Twickenham
Sutton
Gatwick
Slough
Marlow
Cobham
Leamington Spa
Romford
Watford
Bedford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow

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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
Pearson Intl to Stansted flights
Toronto Island to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Vancouver Intl to Gatwick flights
Pearson Intl to Luton flights
Vancouver Intl to Stansted flights
Vancouver Intl to London City flights
Calgary to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Toronto Island to Gatwick flights
Pierre Elliott Trudeau Intl to Stansted flights
Pierre Elliott Trudeau Intl to London City flights
Abbotsford to Heathrow flights
Halifax to Heathrow flights
Ottawa to Heathrow flights
Pierre Elliott Trudeau Intl to Luton flights
Calgary to Gatwick flights
Calgary to London City flights
Halifax to Gatwick flights
Edmonton to Heathrow flights
Pierre Elliott Trudeau Intl to Southend flights
Calgary to Stansted flights
Ottawa to Gatwick flights
Edmonton to Gatwick flights
Halifax to Stansted flights
Calgary to Luton flights
Québec City to Heathrow flights
Winnipeg to Heathrow flights
Ottawa to London City flights
Vancouver Intl to Luton flights
Abbotsford to Gatwick flights
Ottawa to Stansted flights
Victoria to Heathrow flights
Québec City to Gatwick flights
Hamilton to Heathrow flights
Edmonton to London City flights
Halifax to Luton flights
Halifax to London City flights
Edmonton to Stansted flights
Winnipeg to Gatwick flights
Kelowna to Heathrow flights
Victoria to Gatwick flights
Québec City to London City flights
St. John's to Gatwick flights
Victoria to London City 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 4 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 217AverageC$ 217FlexibilityNo cancel feeOn-time60%
Search WestJet flights
WestJet EncoreCheapestC$ 546AverageC$ 696FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
TAP AIR PORTUGALCheapestC$ 594AverageC$ 757FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 614AverageC$ 885FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 651AverageC$ 748FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapestC$ 660AverageC$ 884FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
American AirlinesCheapestC$ 701AverageC$ 903FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapestC$ 704AverageC$ 957FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapestC$ 707AverageC$ 852FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapestC$ 710AverageC$ 1,078FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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