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Cheap flights from London Heathrow Airport to Ontario from £251

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 21/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
9 Jul — 16 Jul1
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 9 June 2026.

Sat 13/606:00
LHR
-
YOW
2 stops19h 56m
Austrian Airlines
Sat 20/620:05
YOW
-
LHR
1 stop10h 45m
Austrian Airlines
Deal found 7/6£380
Fri 19/612:40
LHR
-
YOW
1 stop11h 13m
Air Canada
Mon 22/618:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 5/6£384
Mon 21/906:00
LHR
-
YOW
2 stops32h 24m
Air Canada
Thu 1/1018:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 9/6£390
Sat 13/606:00
LHR
-
YOW
2 stops21h 11m
Air Canada
Sat 20/617:30
YOW
-
LHR
1 stop22h 30m
Air Canada
Deal found 8/6£390
Thu 24/909:30
LHR
-
YOW
Nonstop7h 55m
Air Canada
Thu 8/1018:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 7/6£391
Wed 1/714:10
LHR
-
YOW
Nonstop7h 10m
Air Canada
Thu 9/718:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 8/6£392
Thu 17/906:50
LHR
-
YOW
2 stops13h 20m
Air Canada
Wed 30/921:00
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 7/6£393
Tue 8/1209:30
LHR
-
YYZ
1 stop15h 15m
Multiple Airlines
Tue 29/1206:15
YYZ
-
LHR
1 stop9h 20m
Multiple Airlines
Deal found 9/6£422
Wed 1/718:40
LHR
-
YTZ
2 stops28h 11m
SWISS
Sun 5/718:30
YTZ
-
LHR
2 stops42h 20m
SWISS
Deal found 9/6£422
Wed 9/909:30
LHR
-
YYZ
1 stop11h 50m
Lufthansa
Tue 15/918:35
YYZ
-
LHR
Nonstop7h 00m
Lufthansa
Deal found 9/6£422
Mon 31/806:50
LHR
-
YYZ
1 stop9h 55m
Air Canada
Sun 13/921:35
YYZ
-
LHR
Nonstop7h 00m
Air Canada
Deal found 9/6£423
Mon 31/807:00
LHR
-
YTZ
2 stops15h 51m
Multiple Airlines
Thu 17/908:20
YTZ
-
LHR
1 stop17h 10m
Multiple Airlines
Deal found 8/6£423

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 9 June 2026.

Round-trip from

£384

One-way from

£251

Popular in

August

Cheapest in

February

Average price

£464

Good round-trip deal

£475 or less

Good one-way deal

£401 or less
Air Canada
  • Air Canada
  • 19/6-22/6
  • 1 total stop
  • 17h 48m total
  • London to Ontario
Search Deals
21/9
  • 21/9
  • 3 total stops
  • 32h 30m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£31 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 9 June 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

Fri 19/6

08:40-23:54

2 stops20h 14m

Ottawa

Mon 22/6

14:00-10:40

2 stops15h 40m

£430

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 16/9

09:50-15:50

1 stop11h 00m

Toronto Pearson Intl

Thu 24/9

22:00-10:15

Nonstop7h 15m

£439

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 1/7

08:30-11:15

Nonstop7h 45m

Toronto Pearson Intl

Tue 21/7

18:35-06:35

Nonstop7h 00m

£446

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Sat 4/7

06:50-20:11

2 stops18h 21m

Toronto Island

Sat 11/7

15:15-10:40

1 stop14h 25m

£455

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 3/11

09:30-21:29

2 stops16h 59m

Toronto Pearson Intl

Sat 14/11

11:30-06:20

1 stop13h 50m

£461

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Wed 26/8

07:30-22:23

2 stops19h 53m

Toronto Pearson Intl

Fri 4/9

20:55-21:25

1 stop19h 30m

£461

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sat 28/11

06:50-20:14

2 stops18h 24m

Toronto Pearson Intl

Sun 6/12

20:05-11:05

1 stop10h 00m

£464

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 20/8

11:05-17:27

2 stops35h 22m

Montreal Pierre Elliott Trudeau Intl

Sun 30/8

08:30-07:15

2 stops17h 45m

£471

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 10/7

07:45-22:06

1 stop19h 21m

Montreal Pierre Elliott Trudeau Intl

Mon 20/7

11:23-06:55

2 stops14h 32m

£471

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 30/6

09:30-16:00

1 stop11h 30m

Montreal Pierre Elliott Trudeau Intl

Wed 8/7

18:40-06:30

Nonstop6h 50m

£479

Flights are sorted by cheapest return flights first.

Deals found on 9/6

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 £383). Flying from London Heathrow Airport to Region of Ontario in August is currently the most expensive (average of £599). 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 9 June 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 9 June 2026.

The most flights from LHR to CAON are scheduled on a Tuesday (39 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).

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

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 78 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 9 June 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
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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
11,154 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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
670 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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
8,052 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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
8,035 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Crew

8.1

Food

6.9

Boarding

7.7

Comfort

7.3

Entertainment

7.5

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 United Airlines, British Airways, and Lufthansa fly from London Heathrow Airport to Region of Ontario in about 7h 45m. The time it takes to get you to your destination can typically vary by up to 12h 29m. There are 3543 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 £182. Icelandair flights start at £200 while deals on TAP AIR PORTUGAL start at £239 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 MEA (91%), Singapore Airlines (91%) and Aegean Airlines (90%).

  • 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 £1,162, our data indicates the cheapest price to be £318. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £334.

  • 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 £383). Flying from London Heathrow Airport to Region of Ontario in August is currently the most expensive (average of £599). 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 Pearson Intl flights
Heathrow to Vancouver Intl flights
Gatwick to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Toronto Island flights
London City to Pearson Intl flights
Stansted to Pearson Intl flights
London City to Vancouver Intl flights
Gatwick to Toronto Island flights
Heathrow to Calgary flights
Luton to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Stansted to Vancouver Intl flights
Heathrow to Abbotsford flights
Gatwick to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
London City to Calgary flights
Gatwick to Calgary flights
Heathrow to Ottawa flights
London City to Pierre Elliott Trudeau Intl flights
Heathrow to Halifax flights
Luton to Vancouver Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Stansted to Calgary flights
Luton to Calgary flights
Gatwick to Ottawa flights
Luton to Pierre Elliott Trudeau Intl flights
London City to Ottawa flights
Gatwick to Halifax flights
Stansted to Ottawa flights
Heathrow to Winnipeg flights
Heathrow to Edmonton flights
Gatwick to Edmonton flights
Stansted to Halifax flights
Heathrow to Victoria flights
London City to Edmonton flights
London City to Halifax flights
Stansted to Edmonton flights
Gatwick to Victoria flights
Luton to Halifax flights
Gatwick to Winnipeg flights
Heathrow to Windsor flights
London City to Victoria flights
Gatwick to Abbotsford flights
Gatwick to St. John's flights
Heathrow to St. John's flights
Heathrow to Kelowna flights
Heathrow to Saskatoon flights
Heathrow to Regina 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£273Average£348FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£314Average£416FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£321Average£547FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£325Average£497FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapest£325Average£617FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£329Average£554FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£330Average£561FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£335Average£487FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£341Average£538FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£344Average£579FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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