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Cheap flights from Ontario to London Heathrow Airport from £207

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
17 Jul — 24 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 17 June 2026.

Thu 30/719:00
YUL
-
LHR
1 stop13h 45m
Virgin Atlantic
Sat 8/811:45
LHR
-
YUL
1 stop10h 10m
Virgin Atlantic
Deal found 15/6£419
Wed 4/1107:00
YUL
-
LHR
1 stop23h 05m
United Airlines
Fri 6/1111:05
LHR
-
YUL
2 stops56h 57m
United Airlines
Deal found 15/6£423
Wed 23/920:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Fri 2/1013:05
LHR
-
YYZ
1 stop14h 00m
Icelandair
Deal found 15/6£429
Thu 8/1023:45
YYZ
-
LHR
1 stop14h 05m
TAP AIR PORTUGAL
Mon 12/1019:50
LHR
-
YYZ
1 stop23h 10m
TAP AIR PORTUGAL
Deal found 16/6£429
Sun 20/923:10
YYZ
-
LHR
1 stop16h 10m
Icelandair
Wed 30/921:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 16/6£430
Fri 19/620:30
YUL
-
LHR
1 stop10h 20m
Multiple Airlines
Sun 21/611:05
LHR
-
YUL
1 stop29h 00m
Multiple Airlines
Deal found 14/6£430
Thu 17/923:45
YYZ
-
LHR
1 stop14h 05m
TAP AIR PORTUGAL
Thu 24/906:00
LHR
-
YYZ
1 stop13h 00m
TAP AIR PORTUGAL
Deal found 13/6£431
Fri 6/1117:10
YUL
-
LHR
2 stops14h 50m
SWISS
Sun 8/1109:00
LHR
-
YUL
2 stops35h 10m
SWISS
Deal found 14/6£431
Wed 16/917:35
YYZ
-
LHR
1 stop14h 10m
TAP AIR PORTUGAL
Mon 28/906:00
LHR
-
YYZ
1 stop14h 15m
TAP AIR PORTUGAL
Deal found 16/6£432
Mon 21/916:00
YOW
-
LHR
2 stops34h 55m
Multiple Airlines
Thu 24/907:45
LHR
-
YOW
1 stop13h 53m
Multiple Airlines
Deal found 12/6£432
Mon 21/922:55
YYZ
-
LHR
1 stop14h 55m
TAP AIR PORTUGAL
Thu 8/1011:20
LHR
-
YYZ
1 stop15h 05m
TAP AIR PORTUGAL
Deal found 16/6£432
Tue 11/821:35
YYZ
-
LHR
1 stop12h 25m
Multiple Airlines
Wed 19/819:35
LHR
-
YYZ
1 stop22h 45m
Multiple Airlines
Deal found 15/6£433

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 17 June 2026.

Round-trip from

£419

One-way from

£207

Popular in

July

Cheapest in

February

Average price

£543

Good round-trip deal

£532 or less

Good one-way deal

£354 or less
Virgin Atlantic
  • Virgin Atlantic
  • 30/7-8/8
  • 2 total stops
  • 23h 55m total
  • Ontario to London
Search Deals
19/7
  • 19/7
  • 2 total stops
  • 39h 45m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£68 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 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

 
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 17 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 return flight

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 1/10

23:10-20:20

1 stop16h 10m

London Heathrow

Mon 12/10

21:25-19:10

1 stop26h 45m

£441

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 3/9

22:55-11:10

Nonstop7h 15m

London Heathrow

Wed 23/9

17:50-20:40

Nonstop7h 50m

£461

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 27/11

21:15-09:35

Nonstop7h 20m

London Heathrow

Sat 5/12

08:55-19:45

1 stop15h 50m

£461

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 1/10

22:55-11:10

Nonstop7h 15m

London Heathrow

Mon 12/10

17:50-20:40

Nonstop7h 50m

£461

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 9/9

22:55-11:10

Nonstop7h 15m

London Heathrow

Thu 1/10

17:50-20:40

Nonstop7h 50m

£461

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 16/9

22:55-11:10

Nonstop7h 15m

London Heathrow

Mon 28/9

17:50-20:40

Nonstop7h 50m

£461

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 30/9

22:55-11:10

Nonstop7h 15m

London Heathrow

Tue 6/10

17:50-20:40

Nonstop7h 50m

£461

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

19:00-13:45

1 stop13h 45m

London Heathrow

Tue 25/8

09:55-16:55

1 stop12h 00m

£464

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 21/8

22:20-13:45

1 stop10h 25m

London Heathrow

Sat 29/8

06:15-12:00

1 stop10h 45m

£470

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 12/8

19:00-10:30

1 stop10h 30m

London Heathrow

Tue 18/8

06:15-15:05

1 stop13h 50m

£470

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 £437). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of £663). 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 17 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 17 June 2026.

The most flights from CAON to LHR are scheduled on a Tuesday (46 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (4 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 85 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 £461, Icelandair can have you in London Heathrow Airport from Region of Ontario in 7h 15m. Region of Ontario and London Heathrow Airport are separated by a distance of 3543 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    £170 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 £216 and £243, 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, Toronto Island - London Heathrow or Montreal Pierre Elliott Trudeau Intl - 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 (88%), Air France (88%) or Delta (88%) 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 £985, our data indicates the cheapest price to be £275. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £392.

  • 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 £437). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of £663). 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
Wembley
Luton
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Guildford
Romford
Ipswich

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 17 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£310Average£617FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£361Average£621FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£379Average£496FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£389Average£656FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£405Average£561FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£406Average£555FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£416Average£690FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£458Average£550FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£472Average£573FlexibilityNo 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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