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Cheap flights from Ontario to London Heathrow Airport from £187

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 27/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LHR
3 Apr — 10 Apr1
1 adult

Cheap flight deals from Ontario to Heathrow

Keep the following information in mind while searching for Ontario to Heathrow flight deals. Data was last updated 29 March 2025.

Round-trip from

£364

One-way from

£187

Popular in

December

Cheapest in

February

Average price

£428

Good round-trip deal

£432 or less

Good one-way deal

£353 or less
Icelandair
  • Icelandair
  • 24/4-27/4
  • 2 total stops
  • 43h 05m total
  • Ontario to London
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27/5
  • 27/5
  • 1 total stop
  • 19h 20m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£7 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 March 2025
Search Deals
Price to beat on a round-trip flight from Ontario to London Heathrow.
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Price to beat on a one-way flight from Ontario to London Heathrow.
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Find flight deals from Ontario to Heathrow

Cheapest flights from Ontario to Heathrow
Explore the most affordable flight options available from Ontario to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 March 2025.

Mon 5/523:00YYZ - LHR
1 stop16h 20mIcelandair
Tue 13/521:25LHR - YYZ
1 stop26h 45mIcelandair
Deal found 26/3£363
Wed 30/412:25YTZ - LHR
1 stop13h 05mAir Canada
Tue 6/508:45LHR - YTZ
2 stops14h 05mAir Canada
Deal found 28/3£375
Tue 27/522:15YYZ - LHR
1 stop19h 20mMultiple Airlines
Mon 9/606:20LHR - YYZ
1 stop12h 50mMultiple Airlines
Deal found 27/3£378
Mon 5/523:35YYZ - LHR
Nonstop7h 15mAir Canada
Thu 15/508:40LHR - YYZ
1 stop12h 45mAir Canada
Deal found 27/3£387
Thu 5/622:05YYZ - LHR
Nonstop7h 15mBritish Airways
Tue 17/617:15LHR - YYZ
Nonstop7h 55mBritish Airways
Deal found 28/3£392
Tue 29/418:05YYZ - LHR
Nonstop7h 10mAmerican Airlines
Thu 8/513:20LHR - YYZ
Nonstop7h 40mAmerican Airlines
Deal found 28/3£405
Thu 22/520:30YYZ - LHR
Nonstop7h 05mLufthansa
Sat 31/508:30LHR - YYZ
Nonstop7h 50mLufthansa
Deal found 28/3£410
Wed 14/510:20YTZ - LHR
2 stops15h 10mMultiple Airlines
Thu 22/508:40LHR - YTZ
2 stops14h 10mMultiple Airlines
Deal found 28/3£421
Sun 11/522:25YUL - LHR
Nonstop6h 35mLufthansa
Tue 20/509:30LHR - YUL
1 stop11h 30mLufthansa
Deal found 28/3£428
Sun 11/522:25YUL - LHR
Nonstop6h 35mAir Canada
Wed 21/509:30LHR - YUL
Nonstop7h 10mAir Canada
Deal found 27/3£431
Fri 16/520:30YUL - LHR
2 stops20h 15mSWISS
Fri 30/508:40LHR - YUL
1 stop11h 20mSWISS
Deal found 26/3£432
Thu 24/408:50YUL - LHR
1 stop16h 40mMultiple Airlines
Mon 5/520:05LHR - YUL
1 stop23h 55mMultiple Airlines
Deal found 27/3£433

Cheapflights Fare Finder

Customise your flight search to find flights from Ontario to Heathrow 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 March 2025.
Use the filters below to find and compare flights from Ontario to London Heathrow Airport that are best for you.

Fly from

Ontario

Fly to

Heathrow

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 24/4

23:00-20:20

1 stop16h 20m

London Heathrow

Sun 27/4

21:25-19:10

1 stop26h 45m

£364

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 28/4

20:30-08:35

Nonstop7h 05m

London Heathrow

Thu 15/5

08:40-16:25

1 stop12h 45m

£368

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 3/6

19:30-19:15

2 stops18h 45m

London Heathrow

Wed 11/6

06:15-14:10

1 stop12h 55m

£371

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Wed 30/4

12:25-06:30

1 stop13h 05m

London Heathrow

Tue 6/5

08:45-17:50

2 stops14h 05m

£375

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 23/5

22:00-10:15

Nonstop7h 15m

London Heathrow

Fri 30/5

13:20-16:00

Nonstop7h 40m

£392

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 30/4

18:15-08:35

1 stop9h 20m

London Heathrow

Wed 7/5

08:30-11:20

Nonstop7h 50m

£402

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 21/4

22:00-10:15

Nonstop7h 15m

London Heathrow

Fri 25/4

13:20-16:00

Nonstop7h 40m

£406

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Sat 3/5

15:25-06:30

1 stop10h 05m

London Heathrow

Sat 10/5

07:00-17:50

2 stops15h 50m

£426

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 11/5

22:25-10:00

Nonstop6h 35m

London Heathrow

Tue 20/5

09:30-16:00

1 stop11h 30m

£428

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 11/5

22:25-10:00

Nonstop6h 35m

London Heathrow

Wed 21/5

09:30-11:40

Nonstop7h 10m

£431

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ontario 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 Ontario to London Heathrow Airport

What is the cheapest month to book a flight from Region of Ontario to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). 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 ON to LHR?

Find hourly flight availability from Ontario to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 March 2025.

When flying from Region of Ontario to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 29 March 2025.
Read through reviews of airlines operating flights from Ontario to London, such as Delta, KLM and Azores Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,897 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Azores Airlines
7.6
Good
63 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.5
Good
769 reviews
Delta
8.0
Very Good
7,897 reviews
Check prices

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

Food

7.3

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Heathrow. 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 Region of Ontario to London Heathrow Airport one-way?

    £215 is the cheapest one-way deal found within the past few days, from TAP AIR PORTUGAL. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from £261 and £277, respectively.

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

    When deciding which route to take from Region of Ontario to London Heathrow Airport consider Toronto Pearson Intl - London Heathrow, Montreal Pierre Elliott Trudeau Intl - London Heathrow or Toronto Island - London Heathrow as they are the most popular.

  • What are the most reliable airlines from Region of Ontario to London Heathrow Airport?

    No one likes to see their flight delayed. When booking a flight from Region of Ontario to London Heathrow Airport consider choosing American Airlines (70%), Aer Lingus (70%) or Finnair (70%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Region of Ontario to London Heathrow Airport?

    Looking for the cheapest flight from Region of Ontario to London Heathrow Airport? While on average our users pay £1,028, our data indicates the cheapest price to be £264. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £363.

  • Can I find deals for flights from Ontario to Heathrow that include hotel bookings?

    Yes. In addition to deals on Ontario to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Heathrow.

  • Can I find deals for business class flights from Ontario to Heathrow?

    Yes. Cheapflights offers flight deals from Ontario to Heathrow 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 Region of Ontario to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Region of Ontario to London Heathrow Airport (average of £112). Flying from Region of Ontario to London Heathrow Airport in August is currently the most expensive (average of £164). 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

Travelling to a place near Ontario?

Book flights to Ontario if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Northampton
Swindon
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Ontario to Heathrow

Discover the top 10 airlines that operate flights from Ontario to Heathrow. 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 March 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£255Average£373FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapest£354Average£572FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£370Average£457FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air CanadaCheapest£384Average£793FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IcelandairCheapest£388Average£532FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£411Average£469FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£420Average£487FlexibilityNo cancel feeOn-time75%
Search KLM flights
British AirwaysCheapest£421Average£543FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£432Average£623FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapest£532Average£534FlexibilityNo cancel feeOn-time77%
Search Air France 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 Ontario to Heathrow?

Cheapflights makes it easy to find Ontario to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ontario to Heathrow with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Heathrow flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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