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Cheap flights from Ontario to London Heathrow Airport from C$ 388

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
12 Jul — 19 Jul1
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 12 June 2026.

Sun 4/106:40 p.m.
YUL
-
LHR
Nonstop6h 50m
Lufthansa
Fri 16/107:25 a.m.
LHR
-
YUL
1 stop16h 25m
Lufthansa
Deal found 8/6C$ 785
Thu 11/64:10 p.m.
YUL
-
LHR
1 stop11h 25m
Air Canada
Wed 17/62:10 p.m.
LHR
-
YUL
1 stop11h 09m
Air Canada
Deal found 10/6C$ 786
Fri 11/94:40 p.m.
YUL
-
LHR
1 stop10h 55m
Multiple Airlines
Thu 17/98:45 a.m.
LHR
-
YUL
1 stop11h 15m
Multiple Airlines
Deal found 9/6C$ 788
Tue 15/98:30 p.m.
YUL
-
LHR
1 stop10h 20m
Multiple Airlines
Fri 25/96:00 a.m.
LHR
-
YUL
1 stop14h 00m
Multiple Airlines
Deal found 8/6C$ 789
Fri 12/69:20 p.m.
YUL
-
LHR
1 stop18h 40m
Air Canada
Fri 19/66:50 a.m.
LHR
-
YUL
1 stop9h 15m
Air Canada
Deal found 10/6C$ 791
Tue 16/68:30 p.m.
YUL
-
LHR
1 stop10h 20m
Air Canada
Sat 20/66:00 a.m.
LHR
-
YUL
1 stop12h 50m
Air Canada
Deal found 9/6C$ 792
Thu 10/91:10 p.m.
YUL
-
LHR
1 stop12h 20m
Multiple Airlines
Mon 21/96:00 a.m.
LHR
-
YUL
1 stop12h 50m
Multiple Airlines
Deal found 8/6C$ 793
Tue 9/63:40 p.m.
YUL
-
LHR
1 stop9h 55m
Air Canada
Sun 14/66:00 a.m.
LHR
-
YUL
1 stop12h 50m
Air Canada
Deal found 8/6C$ 795
Mon 15/69:20 p.m.
YUL
-
LHR
1 stop18h 40m
Air Canada
Sun 21/69:30 a.m.
LHR
-
YUL
Nonstop7h 30m
Air Canada
Deal found 8/6C$ 798
Thu 11/66:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Thu 18/69:30 a.m.
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Deal found 9/6C$ 800
Wed 9/96:40 p.m.
YUL
-
LHR
Nonstop6h 50m
Lufthansa
Thu 1/109:30 a.m.
LHR
-
YUL
1 stop11h 28m
Lufthansa
Deal found 10/6C$ 800
Wed 23/98:45 p.m.
YYZ
-
LHR
1 stop10h 10m
Icelandair
Fri 2/101:05 p.m.
LHR
-
YYZ
1 stop14h 00m
Icelandair
Deal found 10/6C$ 803

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 12 June 2026.

Round-trip from

C$ 785

One-way from

C$ 388

Popular in

July

Cheapest in

February

Average price

C$ 1,001

Good round-trip deal

C$ 1,111 or less

Good one-way deal

C$ 664 or less
Lufthansa
  • Lufthansa
  • 4/10-16/10
  • 1 total stop
  • 23h 15m total
  • Ontario to London
Search Deals
21/7
  • 21/7
  • 2 total stops
  • 40h 00m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 228 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 12 June 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

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 9/10

8:30 p.m.-11:50 a.m.

1 stop10h 20m

London Heathrow

Sun 18/10

9:00 a.m.-6:50 p.m.

1 stop14h 50m

C$ 796
Quickest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

10:10 p.m.-10:00 a.m.

Nonstop6h 50m

London Heathrow

Sun 13/9

9:30 a.m.-12:00 p.m.

Nonstop7h 30m

C$ 800

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/9

6:55 p.m.-6:30 a.m.

Nonstop6h 35m

London Heathrow

Mon 14/9

9:30 a.m.-12:25 p.m.

Nonstop7h 55m

C$ 838

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 22/9

5:50 p.m.-10:00 a.m.

1 stop11h 10m

London Heathrow

Sun 11/10

2:05 p.m.-8:50 p.m.

1 stop11h 45m

C$ 845

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

6:35 p.m.-1:00 p.m.

2 stops13h 25m

London Heathrow

Thu 1/10

7:00 a.m.-2:55 p.m.

1 stop12h 55m

C$ 863

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 7/9

6:55 p.m.-6:30 a.m.

Nonstop6h 35m

London Heathrow

Mon 14/9

9:30 a.m.-12:25 p.m.

Nonstop7h 55m

C$ 894

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 1/9

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

Nonstop7h 20m

London Heathrow

Tue 15/9

2:10 p.m.-5:20 p.m.

Nonstop8h 10m

C$ 895

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 30/6

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

Nonstop7h 15m

London Heathrow

Thu 23/7

11:45 a.m.-7:55 p.m.

1 stop13h 10m

C$ 918

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 21/6

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

Nonstop7h 15m

London Heathrow

Mon 29/6

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

Nonstop7h 50m

C$ 926

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 21/6

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

Nonstop7h 15m

London Heathrow

Sun 28/6

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

Nonstop7h 50m

C$ 926

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

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$ 819). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 1,245). 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 12 June 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 12 June 2026.

The most flights from CAON to LHR are scheduled on a Thursday (45 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (28 on average).

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

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 80 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. Lufthansa provides one of the quickest options available for as low as C$ 918. 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$ 61. 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 KLM (87%), Air France (87%) or Delta (87%) 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$ 2,287 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 529 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 683.

  • 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$ 819). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 1,245). 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
Hounslow
Slough
Marlow
Cobham
Leamington Spa
Northampton
Watford
Luton
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
Pearson Intl to Gatwick flights
Vancouver Intl to Heathrow flights
Pearson Intl to Stansted flights
Pearson Intl to London City flights
Toronto Island to Heathrow flights
Vancouver Intl to Gatwick flights
Pierre Elliott Trudeau Intl to Heathrow flights
Toronto Island to Gatwick flights
Pearson Intl to Luton flights
Vancouver Intl to London City flights
Vancouver Intl to Stansted flights
Calgary to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Abbotsford to Heathrow flights
Pierre Elliott Trudeau Intl to London City flights
Pierre Elliott Trudeau Intl to Stansted flights
Halifax to Heathrow flights
Vancouver Intl to Luton flights
Pierre Elliott Trudeau Intl to Luton flights
Calgary to Gatwick flights
Ottawa to Heathrow flights
Calgary to London City flights
Edmonton to Heathrow flights
Pierre Elliott Trudeau Intl to Southend flights
Edmonton to Gatwick flights
Ottawa to Gatwick flights
Calgary to Stansted flights
Abbotsford to Gatwick flights
Halifax to Gatwick flights
Calgary to Luton flights
Edmonton to London City flights
Ottawa to London City flights
Edmonton to Stansted flights
Québec City to Heathrow flights
Halifax to London City flights
Ottawa to Stansted flights
Victoria to Heathrow flights
Québec City to Gatwick flights
Halifax to Stansted flights
Winnipeg to Heathrow flights
Victoria to Gatwick flights
Cranbrook to Heathrow flights
Kelowna to Heathrow flights
Victoria to Stansted flights
Halifax to Luton flights
Victoria to London City flights
Winnipeg to Gatwick 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 12 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 220AverageC$ 222FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 536AverageC$ 973FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
TAP AIR PORTUGALCheapestC$ 607AverageC$ 816FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapestC$ 666AverageC$ 761FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapestC$ 718AverageC$ 1,171FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Air TransatCheapestC$ 724AverageC$ 983FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
British AirwaysCheapestC$ 735AverageC$ 1,031FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapestC$ 748AverageC$ 904FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapestC$ 759AverageC$ 1,048FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapestC$ 763AverageC$ 1,123FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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