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Cheap flights from London Heathrow Airport to Ontario from £223

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
20 Apr — 27 Apr1
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 15 April 2025.

Round-trip from

£317

One-way from

£223

Popular in

August

Cheapest in

February

Average price

£417

Good round-trip deal

£400 or less

Good one-way deal

£458 or less
Air Canada
  • Air Canada
  • 12/5-19/5
  • 3 total stops
  • 32h 42m total
  • London to Ontario
Search Deals
17/9
  • 17/9
  • 1 total stop
  • 13h 25m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£48 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2025
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.
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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 15 April 2025.

Mon 12/509:30LHR - YOW
2 stops15h 45mAir Canada
Wed 21/513:55YOW - LHR
2 stops15h 05mAir Canada
Deal found 14/4£317
Tue 22/407:45LHR - YOW
2 stops31h 13mUnited Airlines
Wed 14/509:50YOW - LHR
2 stops18h 30mUnited Airlines
Deal found 14/4£331
Thu 1/506:30LHR - YYZ
1 stop11h 50mMultiple Airlines
Fri 9/522:30YYZ - LHR
Nonstop7h 10mMultiple Airlines
Deal found 14/4£337
Thu 1/506:30LHR - YYZ
1 stop11h 50mKLM
Sun 4/522:30YYZ - LHR
Nonstop7h 10mKLM
Deal found 14/4£337
Thu 8/508:40LHR - YYZ
1 stop12h 45mAir Canada
Thu 22/514:00YYZ - LHR
1 stop11h 30mAir Canada
Deal found 14/4£338
Fri 2/508:40LHR - YTZ
2 stops16h 10mAir Canada
Sun 11/515:25YTZ - LHR
1 stop10h 05mAir Canada
Deal found 14/4£340
Fri 2/513:30LHR - YYZ
1 stop11h 05mLufthansa
Mon 5/521:25YYZ - LHR
Nonstop7h 10mLufthansa
Deal found 13/4£341
Thu 24/408:40LHR - YTZ
2 stops14h 10mMultiple Airlines
Sun 4/512:25YTZ - LHR
1 stop13h 05mMultiple Airlines
Deal found 14/4£342
Fri 25/406:00LHR - YYZ
1 stop15h 20mSWISS
Tue 29/416:35YYZ - LHR
1 stop20h 15mSWISS
Deal found 14/4£349
Thu 15/507:40LHR - YYZ
1 stop13h 00mBritish Airways
Fri 23/522:00YYZ - LHR
Nonstop7h 15mBritish Airways
Deal found 14/4£356
Wed 23/406:30LHR - YYZ
1 stop12h 00mDelta
Mon 28/422:30YYZ - LHR
Nonstop7h 10mDelta
Deal found 14/4£377
Mon 5/510:30LHR - YUL
1 stop10h 30mMultiple Airlines
Wed 21/516:40YUL - LHR
1 stop10h 15mMultiple Airlines
Deal found 14/4£377

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 15 April 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

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Mon 12/5

09:30-20:15

2 stops15h 45m

Ottawa

Wed 21/5

13:55-10:00

2 stops15h 05m

£317

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 7/5

07:25-09:58

2 stops31h 33m

Ottawa

Fri 16/5

05:15-06:55

2 stops20h 40m

£333

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 1/5

06:30-13:20

1 stop11h 50m

Toronto Pearson Intl

Fri 9/5

22:30-10:40

Nonstop7h 10m

£337

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 1/5

06:30-13:20

1 stop11h 50m

Toronto Pearson Intl

Sun 4/5

22:30-10:40

Nonstop7h 10m

£337

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 8/5

08:40-16:25

1 stop12h 45m

Toronto Pearson Intl

Thu 22/5

18:20-06:35

Nonstop7h 15m

£338

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 2/5

08:40-19:50

2 stops16h 10m

Toronto Island

Sun 11/5

15:25-06:30

1 stop10h 05m

£340

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 2/5

13:30-19:35

1 stop11h 05m

Toronto Pearson Intl

Mon 5/5

21:25-09:35

Nonstop7h 10m

£341

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 12/5

06:00-16:25

1 stop15h 25m

Toronto Pearson Intl

Mon 19/5

20:15-16:25

1 stop15h 10m

£346

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 18/9

08:50-15:50

1 stop12h 00m

Toronto Pearson Intl

Mon 22/9

18:05-06:15

Nonstop7h 10m

£347

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Sat 26/4

14:05-21:35

1 stop12h 30m

Toronto Island

Tue 29/4

12:25-06:30

1 stop13h 05m

£369

Flights are sorted by cheapest return flights first.

Deals found on 14/4

Showing 1-10 of 60 results
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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, 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 15 April 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 15 April 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 (29 on average).

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Region of Ontario ranges from 51.0 - 83.0 inches per month. June is typically the wettest month, when rainfall can reach 83.0 mm. February is typically the driest time to visit Region of Ontario when rainfall is around 51.0 mm.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Region of Ontario, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 21.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -6.0 C).

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 15 April 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair from London to Ontario. 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
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Delta
8.0
Very Good
7,917 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Finnair
7.6
Good
1,269 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know
Azores Airlines
7.5
Good
65 reviews
Delta
8.0
Very Good
7,917 reviews
Check prices

Food

7.3

Entertainment

7.9

Comfort

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Moishe,Oct 2024

LGA - DEN

The plane had a mechanical error that delayed us by almost an hour. On the positive side the captain kept us all in the know

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 £266. SWISS flights start at £326 while deals on Aer Lingus start at £332 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 Egyptair (90%), MEA (90%) and Singapore 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 £1,164, our data indicates the cheapest price to be £346. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £322.

  • 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
Heathrow to Toronto Island flights
London City to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Calgary flights
London City to Vancouver Intl flights
Gatwick to Toronto Island flights
Heathrow to Pierre Elliott Trudeau Intl flights
Luton to Pearson Intl flights
Stansted to Pearson Intl flights
Heathrow to Abbotsford flights
Heathrow to Halifax flights
Gatwick to Calgary flights
London City to Calgary flights
Gatwick to Pierre Elliott Trudeau Intl flights
Heathrow to Ottawa flights
Gatwick to Abbotsford flights
London City to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
Heathrow to Edmonton flights
Gatwick to Edmonton flights
Stansted to Pierre Elliott Trudeau Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Luton to Calgary flights
Stansted to Vancouver Intl flights
Gatwick to Ottawa flights
Gatwick to Halifax flights
Stansted to Calgary flights
London City to Halifax flights
London City to Ottawa flights
Luton to Vancouver Intl flights
Heathrow to St. John's flights
Heathrow to Victoria flights
Heathrow to Winnipeg flights
Heathrow to Québec City flights
Heathrow to Regina flights
Gatwick to St. John's flights
Gatwick to Winnipeg flights
Luton to Halifax flights
Stansted to Halifax flights
London City to Québec City flights
Heathrow to Saskatoon flights
Gatwick to Québec City flights
Gatwick to Victoria 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 15 April 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£284Average£399FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£288Average£569FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£306Average£723FlexibilityNo cancel feeOn-time77%
Search Iberia flights
DeltaCheapest£312Average£509FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£328Average£517FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£329Average£481FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£334Average£558FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£339Average£444FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£340Average£475FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£345Average£621FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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

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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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