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Cheap flights from London Heathrow Airport to Ontario from £248

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 4/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
6 Sep — 13 Sep1
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 7 August 2026.

Thu 27/806:55 -
1 stop16h 55m
Fri 18/918:40 -
Nonstop6h 50m
Deal found 6/8£383
Fri 25/906:00 -
1 stop14h 00m
Sun 27/918:25 -
1 stop22h 10m
Deal found 6/8£385
Fri 4/914:05 -
Nonstop7h 35m
Fri 25/916:35 -
1 stop10h 05m
Deal found 7/8£386
Mon 21/909:30 -
1 stop11h 30m
Mon 28/913:10 -
1 stop12h 20m
Deal found 7/8£386
Wed 26/809:30 -
1 stop11h 30m
Fri 18/918:40 -
Nonstop6h 50m
Deal found 6/8£387
Wed 9/908:40 -
1 stop11h 20m
Fri 18/917:30 -
1 stop10h 05m
Deal found 3/8£388
Tue 22/920:05 -
1 stop23h 55m
Mon 28/917:10 -
2 stops14h 50m
Deal found 4/8£389
Fri 18/906:00 -
1 stop14h 00m
Mon 28/917:10 -
2 stops14h 50m
Deal found 3/8£389
Thu 17/908:45 -
1 stop11h 15m
Fri 25/916:40 -
1 stop10h 55m
Deal found 3/8£390
Wed 16/909:30 -
1 stop11h 30m
Fri 25/916:35 -
1 stop10h 05m
Deal found 4/8£391
Fri 20/1119:25 -
1 stop22h 55m
Fri 27/1113:10 -
1 stop14h 15m
Deal found 7/8£392
Sun 30/812:40 -
1 stop12h 58m
Sat 12/913:10 -
1 stop14h 25m
Deal found 2/8£392

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 7 August 2026.

Round-trip from

£383

One-way from

£248

Popular in

August

Cheapest in

February

Average price

£586

Good round-trip deal

£504 or less

Good one-way deal

£453 or less
Air Canada
  • Air Canada
  • 27/8-18/9
  • 1 total stop
  • 23h 45m total
  • London to Ontario
Search Deals
4/9
  • 4/9
  • 2 total stops
  • 27h 15m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£37 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 August 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 7 August 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

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Mon 21/9

06:20-15:50

1 stop14h 30m

Toronto Pearson Intl

Fri 9/10

22:00-10:15

Nonstop7h 15m

£402
Fastest return journey

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Thu 27/8

14:05-16:40

Nonstop7h 35m

Montreal Pierre Elliott Trudeau Intl

Sat 19/9

18:40-06:30

Nonstop6h 50m

£411

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Sat 19/9

14:05-16:40

Nonstop7h 35m

Montreal Pierre Elliott Trudeau Intl

Mon 28/9

22:10-10:00

Nonstop6h 50m

£412

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Wed 16/9

19:35-15:50

1 stop25h 15m

Toronto Pearson Intl

Mon 12/10

17:35-12:00

1 stop13h 25m

£422

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Wed 26/8

06:50-16:10

2 stops14h 20m

Montreal Pierre Elliott Trudeau Intl

Sun 30/8

09:15-05:55

2 stops15h 40m

£427

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Mon 21/9

09:30-22:06

2 stops17h 36m

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

15:25-10:40

2 stops14h 15m

£427

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Thu 3/9

06:50-16:10

2 stops14h 20m

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

14:20-10:25

2 stops15h 05m

£428

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Fri 4/9

17:55-16:10

2 stops27h 15m

Montreal Pierre Elliott Trudeau Intl

Fri 25/9

15:25-10:40

2 stops14h 15m

£437

LondonToronto

LHR London Heathrow - YTZ Toronto Island

LHRYTZ

London Heathrow

Wed 16/9

06:50-16:42

2 stops14h 52m

Toronto Island

Tue 22/9

15:15-06:55

1 stop10h 40m

£438

LondonToronto

LHR London Heathrow - YTZ Toronto Island

LHRYTZ

London Heathrow

Tue 22/9

06:50-16:42

2 stops14h 52m

Toronto Island

Tue 29/9

15:15-10:40

1 stop14h 25m

£438

Flights are sorted by cheapest return flights first.

Deals found on 4/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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 £414). Flying from London Heathrow Airport to Region of Ontario in August is currently the most expensive (average of £632). 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 7 August 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 7 August 2026.

The most flights from LHR to CAON are scheduled on a Wednesday (34 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).

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

Airfare is below average for this route at the moment.
London Heathrow Airport to Region of Ontario flights typically cost between £524 and £739 in September.
The cheapest return price found within the last 5 days was £394 on Aer Lingus (11 Sept–15 Sept).

How far ahead should I book a flight from London Heathrow Airport to Region of Ontario?

The best time to book flights from London Heathrow Airport to Region of Ontario is 62 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 7 August 2026.
Read reviews from past customers who have flown with Virgin Atlantic,Air Canada, andIcelandair 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
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
694 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Air Canada
7.1
Good
11,436 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
721 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Lufthansa
6.8
Okay
8,178 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,150 reviews
Virgin Atlantic
7.5
Good
694 reviews
Check prices

Crew

8.1

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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 British Airways, Lufthansa, and United Airlines fly from London Heathrow Airport to Region of Ontario in about 7h 35m. The time it takes to get you to your destination can typically vary by up to 6h 55m. There are 3239 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 KLM, which is currently one of the cheapest options available, starting at £181. Icelandair flights start at £199 while deals on TAP AIR PORTUGAL start at £221 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 SAUDIA (94%), Thai Airways (87%) and KLM (83%).

  • 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 £1,667, our data indicates the cheapest price to be £309. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £370.

  • 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 £414). Flying from London Heathrow Airport to Region of Ontario in August is currently the most expensive (average of £632). 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
London City to Vancouver Intl flights
Heathrow to Toronto Island flights
Heathrow to Calgary flights
London City to Pearson Intl flights
Stansted to Pearson Intl flights
Stansted to Vancouver Intl flights
Luton to Pearson Intl flights
Gatwick to Toronto Island flights
Heathrow to Abbotsford flights
Heathrow to Pierre Elliott Trudeau Intl flights
Gatwick to Calgary flights
Luton to Vancouver Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Calgary flights
Southend to Pearson Intl flights
Heathrow to Halifax flights
Stansted to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Stansted to Calgary flights
Luton to Pierre Elliott Trudeau Intl flights
Luton to Calgary flights
Heathrow to Ottawa flights
Heathrow to Edmonton flights
Gatwick to Ottawa flights
Gatwick to Halifax flights
Gatwick to Edmonton flights
Gatwick to Abbotsford flights
London City to Edmonton flights
Stansted to Halifax flights
Heathrow to London flights
London City to Halifax flights
London City to Ottawa flights
Heathrow to Victoria flights
Heathrow to Kelowna flights
Heathrow to Winnipeg flights
Luton to Halifax flights
Gatwick to Victoria flights
Gatwick to London flights
Gatwick to Kelowna flights
Stansted to Edmonton flights
Heathrow to Saskatoon flights
London City to Victoria flights
Gatwick to Winnipeg flights
Stansted 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 7 August 2026.
AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest£263Average£671FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
IcelandairCheapest£312Average£424FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£319Average£515FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£330Average£509FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£334Average£555FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£338Average£518FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£342Average£577FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest£347Average£668FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£362Average£561FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£363Average£535FlexibilityNo cancel feeOn-time70%
Search British Airways 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 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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