Cheap flights from London Heathrow Airport to Ontario from £249

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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YYZ
23 Jul — 30 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 18 July 2025.

Round-trip from

£348

One-way from

£249

Popular in

December

Cheapest in

February

Average price

£518

Good round-trip deal

£427 or less

Good one-way deal

£548 or less
Air Canada
  • Air Canada
  • 29/9-8/10
  • 2 total stops
  • 34h 50m total
  • London to Ontario
11/11
  • 11/11
  • 2 total stops
  • 27h 00m total
  • London to Ontario
Highest demand for flights based on searches. 3% potential increase in price (£10 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Average for round-trip flights in July 2025
Price to beat on a round-trip flight from London Heathrow to Ontario.
Price to beat on a one-way flight from London Heathrow to Ontario.

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 18 July 2025.

Mon 29/906:50LHR - YYZ
1 stop9h 50mAir Canada
Wed 8/1000:30YYZ - LHR
1 stop25h 00mAir Canada
Deal found 16/7£348
Fri 12/906:00LHR - YYZ
1 stop11h 50mMultiple Airlines
Sun 21/920:30YYZ - LHR
Nonstop7h 05mMultiple Airlines
Deal found 16/7£349
Sun 31/806:50LHR - YTZ
2 stops12h 56mAir Canada
Sun 7/915:25YTZ - LHR
1 stop13h 10mAir Canada
Deal found 16/7£349
Tue 23/906:00LHR - YYZ
1 stop11h 50mSWISS
Mon 29/920:15YYZ - LHR
1 stop18h 05mSWISS
Deal found 18/7£351
Fri 17/1007:25LHR - YYZ
1 stop12h 30mLufthansa
Thu 23/1023:35YYZ - LHR
Nonstop7h 15mLufthansa
Deal found 18/7£351
Sat 23/818:00LHR - YUL
1 stop24h 09mAir Canada
Mon 25/813:00YUL - LHR
1 stop12h 30mAir Canada
Deal found 17/7£353
Fri 5/908:40LHR - YUL
1 stop11h 20mSWISS
Sat 4/1016:40YUL - LHR
1 stop18h 45mSWISS
Deal found 18/7£354
Wed 5/1106:35LHR - YUL
1 stop16h 45mMultiple Airlines
Wed 12/1116:50YUL - LHR
1 stop10h 15mMultiple Airlines
Deal found 17/7£354
Wed 15/1007:30LHR - YUL
1 stop13h 30mLufthansa
Wed 5/1120:10YUL - LHR
1 stop15h 55mLufthansa
Deal found 16/7£356
Wed 27/817:30LHR - YTZ
2 stops28h 16mMultiple Airlines
Sat 6/918:25YTZ - LHR
1 stop31h 05mMultiple Airlines
Deal found 17/7£356
Mon 10/1111:40LHR - YYZ
Nonstop8h 10mBritish Airways
Sat 22/1122:05YYZ - LHR
Nonstop7h 05mBritish Airways
Deal found 16/7£359
Fri 31/1006:00LHR - YYZ
1 stop12h 50mAustrian Airlines
Mon 10/1118:30YYZ - LHR
1 stop19h 10mAustrian Airlines
Deal found 17/7£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 18 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

Mon 29/9

06:50-11:40

1 stop9h 50m

Toronto Pearson Intl

Wed 8/10

00:30-06:30

1 stop25h 00m

£348

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 12/9

06:00-12:50

1 stop11h 50m

Toronto Pearson Intl

Sun 21/9

20:30-08:35

Nonstop7h 05m

£349

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Sun 31/8

06:50-14:46

2 stops12h 56m

Toronto Island

Sun 7/9

15:25-09:35

1 stop13h 10m

£349

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 23/9

06:00-12:50

1 stop11h 50m

Toronto Pearson Intl

Mon 29/9

20:15-19:20

1 stop18h 05m

£351

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Fri 17/10

07:25-14:55

1 stop12h 30m

Toronto Pearson Intl

Thu 23/10

23:35-11:50

Nonstop7h 15m

£351

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Mon 12/1

11:10-21:35

2 stops15h 25m

Toronto Island

Sat 17/1

08:50-07:10

2 stops17h 20m

£353

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Sat 23/8

18:00-13:09

1 stop24h 09m

Montreal Pierre Elliott Trudeau Intl

Mon 25/8

13:00-06:30

1 stop12h 30m

£353

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Fri 5/9

08:40-15:00

1 stop11h 20m

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

16:40-16:25

1 stop18h 45m

£354

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 5/11

06:35-18:20

1 stop16h 45m

Montreal Pierre Elliott Trudeau Intl

Wed 12/11

16:50-08:05

1 stop10h 15m

£354

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 6/10

17:50-20:40

Nonstop7h 50m

Toronto Pearson Intl

Tue 14/10

22:30-10:40

Nonstop7h 10m

£356

Flights are sorted by cheapest return flights first.

Deals found on 15/7

Showing 1-10 of 53 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 18 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 18 July 2025.

The most flights from LHR to CAON are scheduled on a Thursday (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 18 July 2025.
Read reviews from past customers who have flown with KLM, Austrian Airlines, andAir France from London Heathrow Airport to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Overall

7.8

Comfort

7.7

Crew

8.4

Food

7.3

Boarding

7.8

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

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 £252. Aer Lingus flights start at £298 while deals on WestJet start at £384 one-way.

  • What are the most popular routes from London Heathrow Airport to Region of Ontario?

  • 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 (85%), Ethiopian Air (83%) and Air Canada (81%).

  • 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 £1,420, our data indicates the cheapest price to be £347. The most popular route (London Heathrow - Toronto Pearson Intl), is priced around £320.

  • 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.

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 18 July 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£292Average£509FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
PLAYCheapest£292Average£357FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
LufthansaCheapest£299Average£512FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£299Average£526FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
DeltaCheapest£307Average£500FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£313Average£538FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£314Average£543FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IcelandairCheapest£318Average£372FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£318Average£462FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Virgin AtlanticCheapest£328Average£447FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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

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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?

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