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Cheap flights from Ontario to London Heathrow Airport from C$ 364

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 15/10. 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

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 30 July 2025.

Round-trip from

C$ 735

One-way from

C$ 356

Popular in

December

Cheapest in

February

Average price

C$ 1,062

Good round-trip deal

C$ 1,100 or less

Good one-way deal

C$ 571 or less
Air Canada
  • Air Canada
  • 13/9-20/9
  • 2 total stops
  • 20h 20m total
  • Ontario to London
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WestJet
  • WestJet
  • 3/11
  • 1 total stop
  • 38h 05m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 47 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 July 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 30 July 2025.

Mon 8/94:00 p.m.YYZ - LHR
1 stop9h 30mAir Canada
Sun 14/98:30 a.m.LHR - YYZ
Nonstop7h 55mAir Canada
Deal found 30/7C$ 735
Mon 1/127:45 p.m.YYZ - LHR
1 stop10h 05mIcelandair
Thu 11/1212:15 p.m.LHR - YYZ
1 stop11h 00mIcelandair
Deal found 30/7C$ 738
Fri 12/910:25 a.m.YTZ - LHR
1 stop15h 05mAir Canada
Tue 16/99:30 a.m.LHR - YTZ
1 stop13h 15mAir Canada
Deal found 30/7C$ 741
Wed 15/1010:30 p.m.YYZ - LHR
Nonstop7h 10mDelta
Wed 22/109:55 a.m.LHR - YYZ
1 stop15h 00mDelta
Deal found 30/7C$ 742
Sat 6/99:55 p.m.YUL - LHR
Nonstop6h 40mAir Canada
Tue 23/96:00 a.m.LHR - YUL
2 stops17h 20mAir Canada
Deal found 27/7C$ 742
Mon 8/96:20 p.m.YYZ - LHR
Nonstop7h 15mLufthansa
Sun 14/98:30 a.m.LHR - YYZ
Nonstop7h 55mLufthansa
Deal found 30/7C$ 746
Fri 19/94:00 p.m.YUL - LHR
1 stop13h 00mMultiple Airlines
Fri 10/109:00 a.m.LHR - YUL
1 stop17h 00mMultiple Airlines
Deal found 28/7C$ 746
Fri 26/96:05 p.m.YYZ - LHR
Nonstop7h 10mBritish Airways
Sun 7/1211:40 a.m.LHR - YYZ
Nonstop8h 10mBritish Airways
Deal found 30/7C$ 748
Tue 30/95:10 p.m.YUL - LHR
1 stop11h 50mLufthansa
Tue 14/1010:50 a.m.LHR - YUL
1 stop13h 00mLufthansa
Deal found 28/7C$ 748
Mon 22/910:55 a.m.YYZ - LHR
1 stop14h 25mIberia
Tue 23/911:30 a.m.LHR - YYZ
2 stops39h 00mIberia
Deal found 29/7C$ 760
Sun 16/114:45 p.m.YUL - LHR
1 stop10h 20mSWISS
Wed 19/116:40 p.m.LHR - YUL
1 stop25h 30mSWISS
Deal found 29/7C$ 760
Mon 3/118:40 p.m.YUL - LHR
Nonstop6h 50mBritish Airways
Fri 7/114:10 p.m.LHR - YUL
Nonstop7h 35mBritish Airways
Deal found 29/7C$ 761

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 30 July 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 8/9

4:00 p.m.-6:30 a.m.

1 stop9h 30m

London Heathrow

Sun 14/9

8:30 a.m.-11:25 a.m.

Nonstop7h 55m

C$ 735

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 1/12

7:45 p.m.-10:50 a.m.

1 stop10h 05m

London Heathrow

Thu 11/12

12:15 p.m.-6:15 p.m.

1 stop11h 00m

C$ 738

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Fri 12/9

10:25 a.m.-6:30 a.m.

1 stop15h 05m

London Heathrow

Tue 16/9

9:30 a.m.-5:45 p.m.

1 stop13h 15m

C$ 741

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 15/10

10:30 p.m.-10:40 a.m.

Nonstop7h 10m

London Heathrow

Wed 22/10

9:55 a.m.-7:55 p.m.

1 stop15h 00m

C$ 742

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 6/9

9:55 p.m.-9:35 a.m.

Nonstop6h 40m

London Heathrow

Tue 23/9

6:00 a.m.-6:20 p.m.

2 stops17h 20m

C$ 742

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 8/9

6:20 p.m.-6:35 a.m.

Nonstop7h 15m

London Heathrow

Sun 14/9

8:30 a.m.-11:25 a.m.

Nonstop7h 55m

C$ 746

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 19/9

4:00 p.m.-10:00 a.m.

1 stop13h 00m

London Heathrow

Fri 10/10

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

1 stop17h 00m

C$ 746

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 26/9

6:05 p.m.-6:15 a.m.

Nonstop7h 10m

London Heathrow

Sun 7/12

11:40 a.m.-2:50 p.m.

Nonstop8h 10m

C$ 748

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

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

1 stop11h 50m

London Heathrow

Tue 14/10

10:50 a.m.-6:50 p.m.

1 stop13h 00m

C$ 748

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 22/9

10:55 a.m.-6:20 a.m.

1 stop14h 25m

London Heathrow

Tue 23/9

11:30 a.m.-9:30 p.m.

2 stops39h 00m

C$ 760

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Showing 1-10 of 55 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$ 857). 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 30 July 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 30 July 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).

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

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 30 July 2025.
See what other customers who have flown with Delta,Austrian Airlines, andSWISS from Ontario to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,980 reviews
Check prices

Crew

8.5

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • 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$ 356. However, be on the lookout for offers from TAP AIR PORTUGAL and Air Canada, 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 Croatia Airlines (88%), KLM (87%) or Air France (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$ 2,230 for a flight from Region of Ontario to London Heathrow Airport. The cheapest flight overall is C$ 415 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 713.

  • 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$ 857). 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
Bromley
Luton
Bedford
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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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 30 July 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 219AverageC$ 225FlexibilityNo cancel feeOn-time60%
Search WestJet flights
PLAYCheapestC$ 510AverageC$ 634FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
WestJet EncoreCheapestC$ 550AverageC$ 702FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
TAP AIR PORTUGALCheapestC$ 598AverageC$ 684FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapestC$ 621AverageC$ 839FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Porter AirlinesCheapestC$ 628AverageC$ 810FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air TransatCheapestC$ 651AverageC$ 953FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapestC$ 677AverageC$ 816FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapestC$ 698AverageC$ 866FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 705AverageC$ 1,061FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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