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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 18/9. 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

Cheap flight deals from Heathrow to Ontario

Keep the following information in mind while searching for Heathrow to Ontario flight deals. Data was last updated 4 July 2025.

Round-trip from

£338

One-way from

£248

Popular in

August

Cheapest in

February

Average price

£504

Good round-trip deal

£400 or less

Good one-way deal

£500 or less
Air Canada
  • Air Canada
  • 25/9-3/10
  • 1 total stop
  • 19h 05m total
  • London to Ontario
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18/9
  • 18/9
  • 1 total stop
  • 12h 50m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£39 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 July 2025
Search Deals
Price to beat on a round-trip flight from London Heathrow to Ontario.
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Price to beat on a one-way flight from London Heathrow to Ontario.
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Find flight deals from Heathrow to Ontario

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 4 July 2025.

Thu 25/906:00LHR - YYZ
1 stop11h 50mMultiple Airlines
Fri 3/1018:20YYZ - LHR
Nonstop7h 15mMultiple Airlines
Deal found 2/7£338
Tue 26/806:50LHR - YYZ
1 stop9h 45mAir Canada
Sun 31/822:40YYZ - LHR
1 stop17h 20mAir Canada
Deal found 4/7£339
Fri 26/919:50LHR - YYZ
1 stop23h 05mTAP AIR PORTUGAL
Mon 29/923:00YYZ - LHR
1 stop13h 45mTAP AIR PORTUGAL
Deal found 3/7£340
Wed 10/908:40LHR - YUL
1 stop11h 20mSWISS
Sat 20/916:40YUL - LHR
1 stop18h 45mSWISS
Deal found 1/7£344
Fri 29/806:50LHR - YTZ
2 stops12h 56mAir Canada
Sun 31/810:20YTZ - LHR
2 stops18h 40mAir Canada
Deal found 2/7£345
Wed 27/810:30LHR - YUL
1 stop10h 30mLufthansa
Thu 11/918:05YUL - LHR
1 stop11h 35mLufthansa
Deal found 1/7£346
Thu 18/906:50LHR - YTZ
2 stops12h 55mMultiple Airlines
Wed 24/908:25YTZ - LHR
1 stop20h 10mMultiple Airlines
Deal found 3/7£352
Thu 13/1109:30LHR - YYZ
1 stop11h 45mLufthansa
Mon 17/1120:25YYZ - LHR
Nonstop7h 05mLufthansa
Deal found 3/7£353
Wed 10/908:40LHR - YUL
1 stop11h 20mAir Canada
Mon 29/921:55YUL - LHR
Nonstop6h 40mAir Canada
Deal found 1/7£358
Sat 4/1017:50LHR - YYZ
Nonstop7h 50mVirgin Atlantic
Sat 11/1022:30YYZ - LHR
Nonstop7h 10mVirgin Atlantic
Deal found 3/7£360
Mon 8/906:00LHR - YUL
1 stop14h 00mMultiple Airlines
Mon 22/921:55YUL - LHR
Nonstop6h 40mMultiple Airlines
Deal found 3/7£360
Thu 28/813:05LHR - YYZ
1 stop11h 05mIcelandair
Sat 6/920:50YYZ - LHR
1 stop10h 05mIcelandair
Deal found 3/7£361

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 4 July 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Heathrow

Fly to

Ontario

Route

Depart

Return

Price

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 25/9

06:00-12:50

1 stop11h 50m

Toronto Pearson Intl

Fri 3/10

18:20-06:35

Nonstop7h 15m

£338

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 26/8

06:50-11:35

1 stop9h 45m

Toronto Pearson Intl

Sun 31/8

22:40-21:00

1 stop17h 20m

£339

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 26/9

19:50-13:55

1 stop23h 05m

Toronto Pearson Intl

Mon 29/9

23:00-17:45

1 stop13h 45m

£340

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 10/9

08:40-15:00

1 stop11h 20m

Montreal Pierre Elliott Trudeau Intl

Sat 20/9

16:40-16:25

1 stop18h 45m

£344

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 29/8

06:50-14:46

2 stops12h 56m

Toronto Island

Sun 31/8

10:20-10:00

2 stops18h 40m

£345

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 27/8

10:30-16:00

1 stop10h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 11/9

18:05-10:40

1 stop11h 35m

£346

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Thu 18/9

06:50-14:45

2 stops12h 55m

Toronto Island

Wed 24/9

08:25-09:35

1 stop20h 10m

£352

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 13/11

09:30-16:15

1 stop11h 45m

Toronto Pearson Intl

Mon 17/11

20:25-08:30

Nonstop7h 05m

£353

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 10/9

08:40-15:00

1 stop11h 20m

Montreal Pierre Elliott Trudeau Intl

Mon 29/9

21:55-09:35

Nonstop6h 40m

£358

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sat 4/10

17:50-20:40

Nonstop7h 50m

Toronto Pearson Intl

Sat 11/10

22:30-10:40

Nonstop7h 10m

£360

Flights are sorted by cheapest return flights first.

Deals found on 3/7

Showing 1-10 of 51 results
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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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of £490). Flying from London Heathrow Airport to Region of Ontario in July is currently the most expensive (average of £708). 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 4 July 2025.

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 4 July 2025.

The most flights from LHR to CAON are scheduled on a Tuesday (39 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (30 on average).

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 4 July 2025.
Read reviews from past customers who have flown with Delta, KLM, andAustrian Airlines from London Heathrow Airport to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,982 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,367 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
809 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 TAP AIR PORTUGAL, which is currently one of the cheapest options available, starting at £253. Aer Lingus flights start at £284 while deals on WestJet start at £382 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 (92%), Ethiopian Air (90%) and Air Canada (86%).

  • 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 £1,346, our data indicates the cheapest price to be £336. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £331.

  • 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to Region of Ontario (average of £490). Flying from London Heathrow Airport to Region of Ontario in July is currently the most expensive (average of £708). 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
London City to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Toronto Island flights
Heathrow to Calgary flights
Stansted to Pearson Intl flights
Gatwick to Toronto Island flights
Luton to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
London City to Vancouver Intl flights
Heathrow to Abbotsford flights
Gatwick to Calgary flights
Heathrow to Halifax flights
London City to Calgary flights
Gatwick to Pierre Elliott Trudeau Intl flights
Gatwick to Abbotsford flights
Stansted to Vancouver Intl flights
Southend to Pearson Intl flights
London City to Pierre Elliott Trudeau Intl flights
Luton to Vancouver Intl flights
Heathrow to Ottawa flights
Luton to Calgary flights
Stansted to Calgary flights
Gatwick to Halifax flights
Luton to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
London City to Halifax flights
Gatwick to Ottawa flights
Heathrow to Edmonton flights
Heathrow to Winnipeg flights
Gatwick to Edmonton flights
London City to Ottawa flights
Luton to Halifax flights
Stansted to Halifax flights
Heathrow to Kelowna flights
Heathrow to St. John's flights
Gatwick to Winnipeg flights
Heathrow to Regina flights
Heathrow to Victoria flights
Gatwick to Kelowna flights
Heathrow to Saskatoon flights
Heathrow to Québec City flights
Heathrow to Windsor flights
London City to Winnipeg flights
Gatwick to London 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 4 July 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£273Average£350FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
Aer LingusCheapest£287Average£502FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£294Average£505FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
DeltaCheapest£301Average£491FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£308Average£534FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Scandinavian AirlinesCheapest£313Average£520FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£313Average£365FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£314Average£532FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapest£315Average£471FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
American AirlinesCheapest£316Average£594FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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

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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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