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Cheap flights from Ontario to London Heathrow Airport from £173

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 21/11. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
9 Sep — 16 Sep1
1 adult

Cheap 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 September 2025.

Round-trip from

£393

One-way from

£173

Popular in

December

Cheapest in

February

Average price

£459

Good round-trip deal

£478 or less

Good one-way deal

£329 or less
Air Canada
  • Air Canada
  • 16/10-9/11
  • 3 total stops
  • 29h 34m total
  • Ontario to London
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WestJet
  • WestJet
  • 21/11
  • 1 total stop
  • 35h 50m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£12 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 September 2025
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Price to beat on a round-trip flight from Ontario to London Heathrow.
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Price to beat on a one-way flight from Ontario to London Heathrow.
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Find flight deals from Ontario to Heathrow

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 September 2025.

Thu 16/1016:00YYZ - LHR
1 stop9h 30mAir Canada
Sun 9/1109:00LHR - YYZ
2 stops20h 04mAir Canada
Deal found 3/9£393
Fri 24/1018:20YYZ - LHR
Nonstop7h 15mMultiple Airlines
Tue 4/1106:00LHR - YYZ
1 stop14h 50mMultiple Airlines
Deal found 2/9£394
Mon 13/1023:35YYZ - LHR
Nonstop7h 15mAir Canada
Wed 22/1017:40LHR - YYZ
1 stop10h 30mAir Canada
Deal found 1/9£394
Mon 20/1021:55YUL - LHR
Nonstop6h 40mAir Canada
Mon 3/1113:25LHR - YUL
Nonstop7h 45mAir Canada
Deal found 3/9£394
Fri 24/1008:50YTZ - LHR
2 stops16h 40mMultiple Airlines
Mon 3/1109:00LHR - YTZ
2 stops14h 00mMultiple Airlines
Deal found 2/9£395
Tue 30/921:20YYZ - LHR
1 stop28h 10mMultiple Airlines
Tue 7/1012:40LHR - YYZ
1 stop11h 45mMultiple Airlines
Deal found 2/9£395
Thu 13/1119:10YUL - LHR
Nonstop7h 00mAir Canada
Wed 26/1109:00LHR - YUL
1 stop11h 10mAir Canada
Deal found 2/9£395
Tue 18/1118:10YYZ - LHR
Nonstop7h 20mLufthansa
Sun 23/1107:40LHR - YYZ
1 stop12h 15mLufthansa
Deal found 3/9£396
Sun 9/1119:10YUL - LHR
Nonstop7h 00mAir Canada
Wed 19/1109:00LHR - YUL
1 stop11h 10mAir Canada
Deal found 2/9£396
Fri 17/1015:25YTZ - LHR
1 stop10h 05mAir Canada
Fri 24/1012:40LHR - YTZ
2 stops13h 54mAir Canada
Deal found 2/9£397
Thu 9/1023:35YYZ - LHR
Nonstop7h 15mMultiple Airlines
Tue 21/1007:25LHR - YYZ
1 stop12h 30mMultiple Airlines
Deal found 2/9£397
Tue 14/1020:05YUL - LHR
1 stop19h 55mAir Canada
Tue 21/1008:45LHR - YUL
1 stop11h 15mAir Canada
Deal found 3/9£397

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 4 September 2025.
Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Ontario

Fly to

Heathrow

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 13/10

17:00-09:35

1 stop11h 35m

London Heathrow

Mon 20/10

06:30-19:45

1 stop18h 15m

£394

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 5/11

18:10-06:30

Nonstop7h 20m

London Heathrow

Sun 7/12

07:40-14:55

1 stop12h 15m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 13/11

18:40-20:35

1 stop20h 55m

London Heathrow

Sun 16/11

09:00-15:10

1 stop11h 10m

£395

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 24/10

08:50-06:30

2 stops16h 40m

London Heathrow

Mon 3/11

09:00-18:00

2 stops14h 00m

£395

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 14/2

23:30-11:50

Nonstop7h 20m

London Heathrow

Sun 22/2

07:40-14:55

1 stop12h 15m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 22/11

18:40-20:35

1 stop20h 55m

London Heathrow

Sat 29/11

09:00-15:10

1 stop11h 10m

£395

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sat 17/1

23:00-11:20

Nonstop7h 20m

London Heathrow

Fri 23/1

06:35-14:55

1 stop13h 20m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

21:55-09:35

Nonstop6h 40m

London Heathrow

Sun 16/11

09:00-15:10

1 stop11h 10m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

21:55-09:35

Nonstop6h 40m

London Heathrow

Sun 16/11

09:00-15:10

1 stop11h 10m

£395

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 20/11

21:45-20:35

1 stop17h 50m

London Heathrow

Fri 28/11

09:00-15:10

1 stop11h 10m

£395

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 60 results
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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, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). 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 September 2025.

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 4 September 2025.

The most flights from CAON to LHR are scheduled on a Tuesday (46 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 on average).

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 £395, Lufthansa can have you in London Heathrow Airport from Region of Ontario in 7h 20m. 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?

    £173 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on TAP AIR PORTUGAL and Air Canada, with prices starting from £193 and £205, 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 (90%), Air France (90%) or Delta (90%) 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 £1,466, our data indicates the cheapest price to be £224. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £351.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). 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
Milton Keynes
Croydon
Hounslow
Gatwick
Slough
Northampton
Luton
Deal
Wembley
Ilford
Crawley
Hayes
Ipswich
Watford
Folkestone
Chichester
Winchester
Swindon
Dartford
Eastbourne

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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.
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Kelowna to Heathrow flights
Victoria to Gatwick flights
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Ottawa to Luton 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 858,174 searches. Data last updated 4 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£366Average£456FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£373Average£479FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£375Average£758FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£389Average£489FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£399Average£606FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£399Average£528FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapest£405Average£507FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapest£416Average£458FlexibilityNo cancel feeOn-time76%
Search Finnair flights
American AirlinesCheapest£417Average£417FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest£471Average£574FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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.

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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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