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Cheap flights from London Heathrow Airport to Ontario from £225

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
4 May — 11 May1
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 29 April 2025.

Round-trip from

£329

One-way from

£225

Popular in

August

Cheapest in

February

Average price

£409

Good round-trip deal

£402 or less

Good one-way deal

£373 or less
Air Canada
  • Air Canada
  • 12/6-19/6
  • 2 total stops
  • 34h 35m total
  • London to Ontario
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10/6
  • 10/6
  • 2 total stops
  • 26h 16m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£46 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 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.
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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 29 April 2025.

Thu 12/608:40LHR - YYZ
1 stop12h 45mAir Canada
Thu 19/618:10YYZ - LHR
1 stop21h 50mAir Canada
Deal found 28/4£329
Thu 12/613:30LHR - YYZ
1 stop11h 15mMultiple Airlines
Thu 19/618:20YYZ - LHR
Nonstop7h 15mMultiple Airlines
Deal found 28/4£330
Sat 21/607:30LHR - YYZ
1 stop13h 50mLufthansa
Mon 30/616:00YYZ - LHR
1 stop9h 30mLufthansa
Deal found 28/4£331
Fri 20/608:40LHR - YTZ
2 stops14h 06mAir Canada
Tue 1/718:25YTZ - LHR
1 stop10h 35mAir Canada
Deal found 28/4£332
Thu 12/606:50LHR - YTZ
2 stops15h 00mMultiple Airlines
Thu 19/612:25YTZ - LHR
2 stops14h 30mMultiple Airlines
Deal found 28/4£335
Fri 19/920:05LHR - YYZ
1 stop21h 45mSWISS
Tue 23/916:35YYZ - LHR
1 stop18h 50mSWISS
Deal found 28/4£346
Wed 21/507:30LHR - YUL
1 stop13h 30mMultiple Airlines
Thu 5/614:10YUL - LHR
1 stop14h 25mMultiple Airlines
Deal found 28/4£354
Fri 20/614:05LHR - YOW
1 stop23h 54mAir Canada
Sat 21/621:55YOW - LHR
2 stops18h 05mAir Canada
Deal found 29/4£356
Wed 3/909:30LHR - YUL
Nonstop7h 10mAir Canada
Mon 8/917:10YUL - LHR
1 stop10h 25mAir Canada
Deal found 28/4£356
Fri 13/609:55LHR - YUL
1 stop12h 00mVirgin Atlantic
Mon 16/618:50YUL - LHR
1 stop14h 00mVirgin Atlantic
Deal found 29/4£357
Fri 16/506:20LHR - YYZ
1 stop14h 20mBritish Airways
Fri 23/518:05YYZ - LHR
Nonstop7h 10mBritish Airways
Deal found 27/4£360
Sat 14/606:30LHR - YUL
1 stop14h 30mLufthansa
Fri 5/914:10YUL - LHR
1 stop13h 25mLufthansa
Deal found 29/4£360

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 29 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

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 12/6

08:40-16:25

1 stop12h 45m

Toronto Pearson Intl

Thu 19/6

18:10-21:00

1 stop21h 50m

£329

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 12/6

13:30-19:45

1 stop11h 15m

Toronto Pearson Intl

Thu 19/6

18:20-06:35

Nonstop7h 15m

£330

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sat 21/6

07:30-16:20

1 stop13h 50m

Toronto Pearson Intl

Mon 30/6

16:00-06:30

1 stop9h 30m

£331

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 20/6

08:40-17:46

2 stops14h 06m

Toronto Island

Tue 1/7

18:25-10:00

1 stop10h 35m

£332

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Thu 12/6

06:50-16:50

2 stops15h 00m

Toronto Island

Thu 19/6

12:25-07:55

2 stops14h 30m

£335

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 19/9

20:05-12:50

1 stop21h 45m

Toronto Pearson Intl

Tue 23/9

16:35-16:25

1 stop18h 50m

£346

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 21/5

07:30-16:00

1 stop13h 30m

Montreal Pierre Elliott Trudeau Intl

Thu 5/6

14:10-09:35

1 stop14h 25m

£354

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 20/6

14:05-08:59

1 stop23h 54m

Ottawa

Sat 21/6

21:55-21:00

2 stops18h 05m

£356

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 3/9

09:30-11:40

Nonstop7h 10m

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

17:10-08:35

1 stop10h 25m

£356

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 13/6

09:55-16:55

1 stop12h 00m

Montreal Pierre Elliott Trudeau Intl

Mon 16/6

18:50-13:50

1 stop14h 00m

£357

Flights are sorted by cheapest return flights first.

Deals found on 29/4

Showing 1-10 of 60 results
1
2
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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 29 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 29 April 2025.

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 (34 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 29 April 2025.
Read reviews from past customers who have flown Delta, KLM and Azores Airlines 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
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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
7,929 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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
1,333 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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
7.6
Good
66 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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
LOT
7.6
Good
1,069 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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
1,273 reviews
Delta
8.0
Very Good
7,929 reviews
Check prices

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Comfort

7.9

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 WestJet, which is currently one of the cheapest options available, starting at £266. TAP AIR PORTUGAL flights start at £270 while deals on British Airways start at £293 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 Croatia Airlines (89%), KLM (88%) and Air France (88%).

  • 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 £1,039, our data indicates the cheapest price to be £343. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £304.

  • 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
Gatwick to Toronto Island flights
Heathrow to Pierre Elliott Trudeau Intl flights
Stansted to Pearson Intl flights
Luton to Pearson Intl flights
London City to Vancouver Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
Heathrow to Abbotsford flights
Gatwick to Calgary flights
Heathrow to Ottawa flights
London City to Calgary flights
Southend to Pearson Intl flights
London City to Pierre Elliott Trudeau Intl flights
Heathrow to Halifax flights
Gatwick to Abbotsford flights
Luton to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Luton to Calgary flights
Stansted to Vancouver Intl flights
Heathrow to Edmonton flights
Gatwick to Ottawa flights
London City to Ottawa flights
Heathrow to Winnipeg flights
Heathrow to St. John's flights
Gatwick to Edmonton flights
Stansted to Calgary flights
Gatwick to Halifax flights
Heathrow to Québec City flights
Heathrow to Kelowna flights
Gatwick to Winnipeg flights
London City to Halifax flights
Gatwick to St. John's flights
Heathrow to Victoria flights
Luton to Vancouver Intl flights
Heathrow to London flights
London City to Winnipeg flights
Heathrow to Saskatoon flights
London City to Québec City flights
Gatwick to Québec City flights
Gatwick to Region of Waterloo Intl flights
Luton to Halifax 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 29 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£8Average£568FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
PLAYCheapest£279Average£404FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£284Average£510FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
IberiaCheapest£302Average£712FlexibilityNo cancel feeOn-time77%
Search Iberia flights
DeltaCheapest£308Average£483FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£315Average£519FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Scandinavian AirlinesCheapest£320Average£538FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£321Average£394FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
TAP AIR PORTUGALCheapest£324Average£539FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
KLMCheapest£337Average£480FlexibilityNo cancel feeOn-time75%
Search KLM 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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