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Cheap flights from London Heathrow Airport to Ontario from £231

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 6/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
3 May — 10 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Ontario
Explore the most affordable flight options available from Heathrow to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 April 2026.

Sat 16/516:40
LHR
-
YOW
1 stop12h 14m
United Airlines
Mon 25/519:30
YOW
-
LHR
1 stop10h 10m
United Airlines
Deal found 31/3£364
Tue 14/413:05
LHR
-
YYZ
1 stop11h 05m
Icelandair
Mon 20/420:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 29/3£390
Sun 12/421:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Tue 21/420:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Deal found 29/3£392
Thu 16/413:05
LHR
-
YYZ
1 stop11h 05m
Icelandair
Mon 11/523:10
YYZ
-
LHR
1 stop16h 10m
Icelandair
Deal found 29/3£395
Sat 18/413:05
LHR
-
YYZ
1 stop11h 05m
Icelandair
Wed 13/523:10
YYZ
-
LHR
1 stop16h 10m
Icelandair
Deal found 29/3£396
Sun 12/421:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Wed 13/520:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Deal found 29/3£398
Thu 4/619:50
LHR
-
YYZ
1 stop23h 25m
TAP AIR PORTUGAL
Thu 11/623:45
YYZ
-
LHR
1 stop17h 20m
TAP AIR PORTUGAL
Deal found 30/3£398
Mon 20/409:30
LHR
-
YTZ
1 stop10h 32m
Air Canada
Wed 29/412:30
YTZ
-
LHR
1 stop13h 00m
Air Canada
Deal found 29/3£398
Wed 6/513:05
LHR
-
YYZ
1 stop11h 05m
Icelandair
Mon 18/520:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 31/3£401
Thu 7/513:05
LHR
-
YYZ
1 stop14h 00m
Icelandair
Mon 11/520:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 29/3£402
Sat 11/414:10
LHR
-
YYZ
1 stop11h 25m
Air Canada
Tue 12/514:00
YYZ
-
LHR
1 stop11h 30m
Air Canada
Deal found 31/3£404
Wed 13/506:00
LHR
-
YYZ
1 stop13h 00m
TAP AIR PORTUGAL
Wed 20/517:35
YYZ
-
LHR
1 stop11h 45m
TAP AIR PORTUGAL
Deal found 29/3£405

Find flight deals from Heathrow to Ontario

Keep the following information in mind while searching for Heathrow to Ontario flight deals. Data was last updated 3 April 2026.

Round-trip from

£364

One-way from

£231

Popular in

December

Cheapest in

February

Average price

£432

Good round-trip deal

£398 or less

Good one-way deal

£410 or less
United Airlines
  • United Airlines
  • 16/5-25/5
  • 2 total stops
  • 22h 24m total
  • London to Ontario
Search Deals
6/5
  • 6/5
  • 3 total stops
  • 37h 30m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£16 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Ontario.
Search Deals
Price to beat on a one-way flight from London Heathrow to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Ontario 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 3 April 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 19/5

08:45-23:54

2 stops20h 09m

Ottawa

Thu 28/5

10:25-07:15

2 stops15h 50m

£454

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sun 17/5

07:25-18:55

2 stops16h 30m

Ottawa

Sun 24/5

15:10-08:20

1 stop12h 10m

£460

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 27/4

21:25-19:10

1 stop26h 45m

Toronto Pearson Intl

Thu 21/5

23:10-11:55

1 stop31h 45m

£471

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 22/4

21:05-15:40

2 stops23h 35m

Toronto Pearson Intl

Wed 6/5

17:10-16:00

1 stop17h 50m

£482

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Tue 19/5

16:40-23:54

1 stop12h 14m

Ottawa

Tue 26/5

06:05-21:25

1 stop10h 20m

£482

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 28/9

19:50-15:40

2 stops24h 50m

Toronto Pearson Intl

Mon 5/10

17:10-09:20

1 stop11h 10m

£519

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 24/9

06:30-13:20

1 stop11h 50m

Toronto Pearson Intl

Fri 2/10

22:55-11:10

Nonstop7h 15m

£533

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 8/5

20:50-17:20

1 stop25h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 24/5

23:45-09:10

1 stop28h 25m

£534

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Thu 17/9

06:50-16:41

2 stops14h 51m

Toronto Island

Wed 30/9

14:20-07:15

1 stop11h 55m

£543

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Wed 9/9

06:50-16:41

2 stops14h 51m

Toronto Island

Wed 16/9

14:55-06:55

1 stop11h 00m

£544

Flights are sorted by cheapest return flights first.

Deals found on 1/4

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Heathrow to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Heathrow 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 London Heathrow Airport to Ontario

What is the cheapest month to book a flight from London Heathrow Airport to Region of Ontario?

Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of £307). Flying from London Heathrow Airport to Region of Ontario in December is currently the most expensive (average of £372). 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 LHR to ON?

Find hourly flight availability from Heathrow to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 April 2026.

When flying from London Heathrow Airport to Region of Ontario, 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 London Heathrow Airport to Region of Ontario

Explore weekly flight availability from Heathrow to Ontario. 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 3 April 2026.

The most flights from LHR to CAON are scheduled on a Thursday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (26 on average).

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated 3 April 2026.
Read reviews from past customers who have flown with Virgin Atlantic,Air France, andAir Canada from London Heathrow Airport to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
685 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Air France
7.4
Good
1,563 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Air Canada
7.1
Good
10,889 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,886 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,848 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.9

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Ontario. 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 London Heathrow Airport to Region of Ontario?

    Airlines like Air Canada, United Airlines, and Icelandair fly from London Heathrow Airport to Region of Ontario in about 10h 32m. The time it takes to get you to your destination can typically vary by up to 16h 13m. There are 3537 mi between London Heathrow Airport and Region of Ontario. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at £149. TAP AIR PORTUGAL flights start at £218 while deals on WestJet start at £228 one-way.

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

    The most popular flight routes from London Heathrow Airport to Region of Ontario are London Heathrow - Toronto Pearson Intl, London Heathrow - Toronto Island and London Heathrow - Montreal Pierre Elliott Trudeau Intl.

  • What are the most reliable airlines from London Heathrow Airport to Region of Ontario?

    The top 3 most reliable airlines when flying from London Heathrow Airport to Region of Ontario are Thai Airways (85%), Ethiopian Air (83%) and SriLankan Airlines (80%).

  • What are the cheapest flights from London Heathrow Airport to Region of Ontario?

    Looking for the cheapest flight from London Heathrow Airport to Region of Ontario? While on average our users pay £1,251, our data indicates the cheapest price to be £303. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £333.

  • Can I find deals for flights from Heathrow to Ontario that include hotel bookings?

    Yes. In addition to deals on Heathrow to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Ontario.

  • Can I find deals for business class flights from Heathrow to Ontario?

    Yes. Cheapflights offers flight deals from Heathrow to Ontario 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 London Heathrow Airport to Region of Ontario?

    Currently, February is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of £307). Flying from London Heathrow Airport to Region of Ontario in December is currently the most expensive (average of £372). 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

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Alternative routes for Heathrow to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Vancouver Intl flights
Heathrow to Pearson Intl flights
Gatwick to Vancouver Intl flights
Gatwick to Pearson Intl flights
Heathrow to Toronto Island flights
London City to Vancouver Intl flights
Stansted to Pearson Intl flights
London City to Pearson Intl flights
Stansted to Vancouver Intl flights
Heathrow to Calgary flights
Heathrow to Pierre Elliott Trudeau Intl flights
Luton to Pearson Intl flights
Gatwick to Toronto Island flights
Heathrow to Abbotsford flights
Gatwick to Pierre Elliott Trudeau Intl flights
Luton to Vancouver Intl flights
Gatwick to Calgary flights
London City to Calgary flights
London City to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
Heathrow to Halifax flights
Stansted to Pierre Elliott Trudeau Intl flights
Stansted to Calgary flights
Luton to Calgary flights
Luton to Pierre Elliott Trudeau Intl flights
Heathrow to Ottawa flights
Heathrow to Edmonton flights
Gatwick to Halifax flights
Gatwick to Ottawa flights
Stansted to Halifax flights
Heathrow to Winnipeg flights
London City to Halifax flights
Heathrow to Saskatoon flights
Heathrow to Victoria flights
Stansted to Ottawa flights
London City to Edmonton flights
Gatwick to Edmonton flights
Gatwick to St. John's flights
Heathrow to Québec City flights
Heathrow to St. John's flights
Gatwick to Saskatoon flights
Luton to Halifax flights
Gatwick to Québec City flights
Heathrow to Kelowna flights
Gatwick to Abbotsford flights
Stansted to Edmonton flights
London City to Saskatoon flights
Heathrow to London flights
London City to Ottawa flights

Top 10 airlines flying from Heathrow to Ontario

Discover the top 10 airlines that operate flights from Heathrow to Ontario. 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 3 April 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£276Average£348FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£309Average£398FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£315Average£546FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£316Average£580FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£324Average£540FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£328Average£515FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air TransatCheapest£334Average£431FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapest£340Average£594FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£341Average£458FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£342Average£476FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Ontario?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Ontario from Heathrow today with Cheapflights!

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

Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Ontario 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 Heathrow to Ontario with no change fees?

Need flexible booking options for your flight to Ontario from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Ontario become cheaper?

Of course! You can now track prices for flights from Heathrow to Ontario and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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