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Cheap flights from Ontario to London Heathrow Airport from C$ 333

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
16 oct. — 23 oct.1
1 adult
1 adult, Economy

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 16 septiembre 2025.

Round-trip from

C$ 718

One-way from

C$ 333

Popular in

December

Cheapest in

February

Average price

C$ 855

Good round-trip deal

C$ 913 or less

Good one-way deal

C$ 602 or less
Icelandair
  • Icelandair
  • 16/10-22/10
  • 2 total stops
  • 58h 40m total
  • Ontario to London
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21/11
  • 21/11
  • 1 total stop
  • 17h 15m total
  • Ontario to London
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Highest demand for flights based on searches. 4% potential increase in price (C$ 51 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 37 potential savings vs. average RT price).
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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 16 septiembre 2025.

vie. 17/1011:00 p.m.YYZ - LHR
1 stop31h 55mIcelandair
mié. 22/109:25 p.m.LHR - YYZ
1 stop26h 45mIcelandair
Deal found 16/9C$ 718
mar. 18/115:35 p.m.YYZ - LHR
1 stop18h 55mTAP AIR PORTUGAL
dom. 30/116:00 a.m.LHR - YYZ
1 stop13h 25mTAP AIR PORTUGAL
Deal found 15/9C$ 721
lun. 17/1110:45 p.m.YYZ - LHR
1 stop13h 45mTAP AIR PORTUGAL
dom. 23/116:00 a.m.LHR - YYZ
1 stop13h 25mTAP AIR PORTUGAL
Deal found 15/9C$ 725
jue. 23/1011:00 p.m.YYZ - LHR
1 stop31h 55mIcelandair
jue. 6/1112:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Deal found 15/9C$ 727
jue. 23/108:50 a.m.YTZ - LHR
1 stop16h 40mAir Canada
jue. 6/116:00 a.m.LHR - YTZ
2 stops15h 55mAir Canada
Deal found 16/9C$ 728
dom. 9/117:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
jue. 13/118:35 p.m.LHR - YYZ
1 stop26h 40mIcelandair
Deal found 15/9C$ 728
lun. 13/106:20 p.m.YYZ - LHR
Nonstop7h 15mAir Canada
jue. 23/106:00 a.m.LHR - YYZ
1 stop11h 50mAir Canada
Deal found 14/9C$ 729
jue. 23/102:00 p.m.YYZ - LHR
1 stop11h 30mAir Canada
jue. 6/119:00 a.m.LHR - YYZ
1 stop12h 10mAir Canada
Deal found 14/9C$ 731
vie. 24/108:50 a.m.YTZ - LHR
2 stops16h 40mAir Canada
sáb. 1/116:50 a.m.LHR - YTZ
2 stops14h 05mAir Canada
Deal found 14/9C$ 732
mié. 12/116:15 a.m.YYZ - LHR
1 stop9h 20mAir Canada
dom. 16/116:00 a.m.LHR - YYZ
1 stop12h 50mAir Canada
Deal found 14/9C$ 732
vie. 24/108:50 a.m.YTZ - LHR
2 stops16h 40mAir Canada
dom. 2/115:50 a.m.LHR - YTZ
2 stops13h 05mAir Canada
Deal found 16/9C$ 734
vie. 14/117:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
mié. 26/1112:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Deal found 15/9C$ 734

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 16 septiembre 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

YTZ - LHR

YTZLHR

Toronto Island

mar. 3/2

8:50 a.m.-7:10 a.m.

2 stops17h 20m

London Heathrow

mar. 10/2

6:00 a.m.-5:55 p.m.

2 stops16h 55m

C$ 772

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

mié. 15/10

12:25 p.m.-6:30 a.m.

1 stop13h 05m

London Heathrow

mar. 31/3

9:30 a.m.-2:52 p.m.

1 stop10h 22m

C$ 783

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

mar. 24/2

10:30 a.m.-7:10 a.m.

1 stop15h 40m

London Heathrow

mar. 3/3

1:25 p.m.-7:55 p.m.

1 stop11h 30m

C$ 792

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

mié. 15/10

3:00 p.m.-6:30 a.m.

1 stop10h 30m

London Heathrow

mar. 31/3

12:05 p.m.-2:55 p.m.

Nonstop7h 50m

C$ 804

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

dom. 28/9

5:25 p.m.-9:35 a.m.

1 stop11h 10m

London Heathrow

mar. 4/11

6:50 a.m.-2:55 p.m.

2 stops13h 05m

C$ 815

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

jue. 16/10

10:20 a.m.-6:30 a.m.

1 stop15h 10m

London Heathrow

mar. 21/10

6:00 a.m.-4:45 p.m.

2 stops15h 45m

C$ 821

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

mar. 11/11

5:10 p.m.-9:20 p.m.

2 stops47h 10m

London Heathrow

vie. 14/11

5:30 p.m.-3:40 p.m.

2 stops51h 10m

C$ 834

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

mar. 30/9

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

Nonstop6h 35m

London Heathrow

dom. 30/11

11:10 a.m.-6:20 p.m.

1 stop12h 10m

C$ 836

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

mar. 28/10

3:30 p.m.-7:10 a.m.

1 stop11h 40m

London Heathrow

vie. 14/11

1:25 p.m.-9:35 p.m.

1 stop13h 10m

C$ 841

LondonLondon

YXU - LHR

YXULHR

London

mié. 29/10

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

2 stops17h 45m

London Heathrow

mié. 5/11

7:40 a.m.-9:21 p.m.

2 stops18h 41m

C$ 856

Flights are sorted by cheapest round-trip flights first.

Deals found on 15/9

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 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, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 560). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 856). 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 16 septiembre 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 16 septiembre 2025.

The most flights from CAON to LHR are scheduled on a Friday (46 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (39 on average).

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 10h 30m. Air Canada provides one of the quickest options available for as low as C$ 804. 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 Air Canada, with whom users have recently found tickets for as low as C$ 380. However, be on the lookout for offers from TAP AIR PORTUGAL and WestJet, 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, Montreal Pierre Elliott Trudeau Intl - London Heathrow and Toronto Island - 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$ 2,096 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 413 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 557.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of C$ 560). Flying from Region of Ontario to London Heathrow Airport in July is currently the most expensive (average of C$ 856). 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
Brentford
Sutton
Hounslow
Slough
Marlow
Leamington Spa
Milton Keynes
Romford
Watford
Bedford
Luton
Southall

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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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Hamilton to Heathrow flights
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Edmonton to Gatwick flights
Calgary to Stansted flights
Regina to Heathrow flights
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Edmonton to London City flights
St. John's to Heathrow flights
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Québec City to Heathrow flights
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St. John's to Gatwick flights
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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 16 septiembre 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 219AverageC$ 225FlexibilityNo cancel feeOn-time60%
Search WestJet flights
PLAYCheapestC$ 484AverageC$ 632FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
WestJet EncoreCheapestC$ 551AverageC$ 703FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
TAP AIR PORTUGALCheapestC$ 601AverageC$ 725FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 629AverageC$ 809FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 651AverageC$ 939FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapestC$ 656AverageC$ 851FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 692AverageC$ 862FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapestC$ 700AverageC$ 874FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 708AverageC$ 1,066FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

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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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