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Cheap flights from Ontario to London Heathrow Airport from £195

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
4 Aug — 11 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 5 July 2026.

Thu 24/920:40
YUL
-
LHR
1 stop30h 35m
SWISS
Sun 27/906:00
LHR
-
YUL
1 stop14h 00m
SWISS
Deal found 1/7£405
Wed 5/818:20
YYZ
-
LHR
2 stops14h 10m
Multiple Airlines
Fri 28/821:10
LHR
-
YYZ
1 stop21h 50m
Multiple Airlines
Deal found 1/7£409
Tue 28/720:45
YYZ
-
LHR
2 stops18h 35m
Multiple Airlines
Mon 17/807:40
LHR
-
YYZ
2 stops19h 25m
Multiple Airlines
Deal found 3/7£410
Thu 3/923:05
YYZ
-
LHR
1 stop9h 50m
Multiple Airlines
Tue 8/921:10
LHR
-
YYZ
2 stops22h 50m
Multiple Airlines
Deal found 3/7£411
Wed 23/917:35
YYZ
-
LHR
1 stop11h 45m
TAP AIR PORTUGAL
Mon 28/918:45
LHR
-
YYZ
1 stop24h 15m
TAP AIR PORTUGAL
Deal found 3/7£412
Thu 1/1020:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Thu 8/1021:25
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 3/7£412
Sat 24/1020:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Thu 5/1112:15
LHR
-
YYZ
1 stop11h 00m
Icelandair
Deal found 4/7£413
Thu 15/1020:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Wed 21/1021:25
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 2/7£414
Thu 1/1023:10
YYZ
-
LHR
1 stop16h 10m
Icelandair
Mon 12/1021:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 1/7£415
Sat 14/1119:40
YYZ
-
LHR
1 stop18h 50m
Icelandair
Fri 20/1112:15
LHR
-
YYZ
1 stop11h 00m
Icelandair
Deal found 5/7£415
Fri 6/1110:10
YUL
-
LHR
1 stop20h 10m
Air Canada
Sun 8/1111:05
LHR
-
YUL
1 stop29h 35m
Air Canada
Deal found 5/7£415
Mon 9/1119:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Tue 24/1112:15
LHR
-
YYZ
1 stop11h 00m
Icelandair
Deal found 30/6£416

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 5 July 2026.

Round-trip from

£405

One-way from

£195

Popular in

July

Cheapest in

February

Average price

£637

Good round-trip deal

£501 or less

Good one-way deal

£361 or less
SWISS
  • SWISS
  • 24/9-27/9
  • 2 total stops
  • 44h 35m total
  • Ontario to London
Search Deals
19/7
  • 19/7
  • 2 total stops
  • 30h 20m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£70 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return 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

 
Customise 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 858,174 searches. Data last updated 5 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 return flight

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 10/8

22:00-10:15

Nonstop7h 15m

London Heathrow

Mon 17/8

07:30-18:35

1 stop16h 05m

£467

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 26/9

21:00-08:35

Nonstop6h 35m

London Heathrow

Thu 1/10

09:30-12:25

Nonstop7h 55m

£472

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 23/9

21:00-08:35

Nonstop6h 35m

London Heathrow

Fri 2/10

09:30-13:54

1 stop9h 24m

£474
Fastest return journey

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 2/11

21:15-09:05

Nonstop6h 50m

London Heathrow

Mon 16/11

16:45-19:15

Nonstop7h 30m

£486

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 23/9

15:10-10:40

2 stops14h 30m

London Heathrow

Fri 2/10

06:50-22:35

2 stops20h 45m

£504

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 6/10

08:30-05:55

2 stops16h 25m

London Heathrow

Tue 13/10

06:50-17:23

2 stops15h 33m

£504

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

18:30-06:45

1 stop31h 15m

London Heathrow

Fri 2/10

06:50-17:19

2 stops15h 29m

£504

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 24/9

12:15-08:20

2 stops15h 05m

London Heathrow

Sun 27/9

12:15-18:46

1 stop11h 31m

£505

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 19/9

09:45-05:55

2 stops15h 10m

London Heathrow

Thu 24/9

06:50-19:01

2 stops17h 11m

£505

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 2/10

12:15-06:45

1 stop13h 30m

London Heathrow

Sat 10/10

12:15-18:46

1 stop11h 31m

£506

Flights are sorted by cheapest return flights first.

Deals found on 30/6

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 return 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 £439). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of £667). 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 5 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 5 July 2026.

The most flights from CAON to LHR are scheduled on a Friday (53 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (33 on average).

How much does it cost for a return flight from Region of Ontario to London Heathrow Airport?

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

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Region of Ontario to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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?

    For as low as £472, Finnair can have you in London Heathrow Airport from Region of Ontario in 6h 35m. Region of Ontario and London Heathrow Airport are separated by a distance of 3320 mi. Generally, flights for this route are direct.

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

    £171 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from £217 and £244, respectively.

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

    When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

  • 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 (86%), Air France (86%) or Delta (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?

    Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,317, our data indicates the cheapest price to be £197. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £380.

  • 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 holiday 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 £439). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of £667). 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
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Watford
Kingston upon Thames
Swindon
Eastbourne
Poole
Southall
Aylesbury
Romford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 9 airlines flying from Ontario to Heathrow

Discover the top 9 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 858,174 searches. Data last updated 5 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£311Average£619FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£362Average£624FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£381Average£498FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£391Average£626FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£404Average£597FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£407Average£512FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£419Average£699FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£467Average£514FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£474Average£576FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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 makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Heathrow for you. Better yet — we are completely free to use.

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, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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