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Cheap flights from Ontario to London from £171

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 16 January 2026.

Round-trip from

£380

One-way from

£171

Popular in

December

Cheapest in

February

Average price

£408

Good round-trip deal

£491 or less

Good one-way deal

£267 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 16/2-22/2
  • 2 total stops
  • 45h 40m total
  • Ontario to London
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21/1
  • 21/1
  • 1 total stop
  • 11h 45m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£17 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 January 2026
Search Deals
Price to beat on a round-trip flight from Ontario to London (LON).
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Price to beat on a one-way flight from Ontario to London (LON).
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Find flight deals from Ontario to London

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to London
Explore the most affordable flight options available from Ontario to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Mon 16/221:45
YUL
-
LGW
1 stop31h 05m
TAP AIR PORTUGAL
Sun 22/210:40
LGW
-
YUL
1 stop14h 35m
TAP AIR PORTUGAL
Deal found 14/1£380
Fri 20/322:45
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Wed 8/411:20
LHR
-
YUL
1 stop14h 25m
TAP AIR PORTUGAL
Deal found 14/1£382
Sun 15/221:45
YUL
-
LHR
1 stop14h 45m
TAP AIR PORTUGAL
Sun 22/216:30
LHR
-
YUL
1 stop32h 45m
TAP AIR PORTUGAL
Deal found 14/1£383
Wed 18/221:45
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Sun 22/216:30
LHR
-
YUL
1 stop32h 45m
TAP AIR PORTUGAL
Deal found 13/1£383
Wed 6/522:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Wed 20/508:00
LHR
-
YUL
1 stop17h 45m
TAP AIR PORTUGAL
Deal found 14/1£385
Wed 18/221:45
YUL
-
LGW
1 stop31h 05m
TAP AIR PORTUGAL
Tue 24/216:35
LGW
-
YUL
1 stop32h 40m
TAP AIR PORTUGAL
Deal found 13/1£386
Mon 4/522:45
YUL
-
LGW
1 stop11h 50m
TAP AIR PORTUGAL
Wed 13/510:35
LGW
-
YUL
1 stop15h 10m
TAP AIR PORTUGAL
Deal found 15/1£386
Wed 15/422:45
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Sat 25/418:45
LHR
-
YUL
1 stop31h 25m
TAP AIR PORTUGAL
Deal found 14/1£386
Mon 16/320:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Sun 12/421:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Deal found 15/1£388
Fri 17/422:45
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Sun 26/406:00
LHR
-
YUL
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 15/1£388
Mon 6/420:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Sat 18/413:05
LHR
-
YYZ
1 stop14h 00m
Icelandair
Deal found 15/1£389
Mon 4/522:55
YYZ
-
LGW
1 stop11h 40m
TAP AIR PORTUGAL
Tue 12/516:25
LGW
-
YYZ
1 stop26h 35m
TAP AIR PORTUGAL
Deal found 15/1£389

Cheapflights Fare Finder

 
Customise your flight search to find flights from Ontario to London 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 16 January 2026.
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Ontario

Fly to

London

Route

Depart

Return

Price

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 30/4

12:25-06:30

1 stop13h 05m

London Heathrow

Fri 15/5

14:05-07:52

1 stop22h 47m

£394

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Thu 5/2

12:30-10:05

2 stops16h 35m

London Heathrow

Sat 28/2

13:25-07:55

1 stop23h 30m

£400

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Mon 20/4

12:25-06:30

1 stop13h 05m

London Heathrow

Sun 3/5

06:00-21:32

2 stops20h 32m

£404

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

10:15-09:45

1 stop18h 30m

London Gatwick

Sun 8/3

11:40-16:55

1 stop33h 15m

£407

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sat 31/1

17:25-16:05

1 stop17h 40m

London Luton

Sat 7/2

06:00-15:55

1 stop14h 55m

£408

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 12/2

21:35-09:45

Nonstop7h 10m

London Gatwick

Fri 20/2

11:40-15:00

Nonstop8h 20m

£409

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 15/2

21:35-09:45

Nonstop7h 10m

London Gatwick

Wed 25/2

11:40-15:00

Nonstop8h 20m

£409

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Fri 30/1

21:35-09:45

Nonstop7h 10m

London Gatwick

Thu 5/3

11:40-15:00

Nonstop8h 20m

£409

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 13/4

18:30-06:35

Nonstop7h 05m

London Heathrow

Sat 25/4

07:25-14:25

1 stop12h 00m

£412

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sun 12/4

22:00-13:35

1 stop10h 35m

London Luton

Tue 21/4

08:05-14:15

1 stop11h 10m

£412

Flights are sorted by cheapest return flights first.

Deals found on 15/1

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

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Currently, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of £323). Flying from Region of Ontario to London in July is currently the most expensive (average of £445). 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 LON?

Find hourly flight availability from Ontario to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 January 2026.

When flying from Region of Ontario to London, 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 Region of Ontario to London

Explore weekly flight availability from Ontario to London. 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 16 January 2026.

The most flights from CAON to LON are scheduled on a Wednesday (42 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).

Related info for your journey

Find useful and relevant information for your journey from Ontario to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Region of Ontario to London?

    A quick flight from Region of Ontario to London can take about 7h 05m. Air Canada provides one of the quickest options available for as low as £412. The distance between Region of Ontario and London is about 3543 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Region of Ontario to London one-way?

    £160 is the cheapest one-way deal found within the past few days, from Air Transat. You may also be able to find cheap deals on TAP AIR PORTUGAL and Air Canada, with prices starting from £169 and £222, respectively.

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

    The most popular route from Region of Ontario to London is Toronto Pearson Intl - London Heathrow. You may also consider Toronto Pearson Intl - London Gatwick or Montreal Pierre Elliott Trudeau Intl - London Heathrow.

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

    The top 3 most reliable airlines when flying from Region of Ontario to London are KLM (74%), Air France (74%) and Delta (74%).

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

    Looking for the cheapest flight from Region of Ontario to London? While on average our users pay £925, our data indicates the cheapest price to be £265. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £352.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to London 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?

    Currently, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of £323). Flying from Region of Ontario to London in July is currently the most expensive (average of £445). 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 London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Slough
Gatwick
Hounslow
Wembley
Ilford
Brentford
Hayes
Colchester
Watford
Crawley
Kingston upon Thames
Bedford
Chelmsford
Eastbourne
Romford
Folkestone
Southall

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to London

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Heathrow flights
Pearson Intl to Gatwick flights
Vancouver Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to London City flights
Pearson Intl to Stansted flights
Vancouver Intl to Gatwick flights
Toronto Island to Heathrow flights
Pearson Intl to Luton flights
Calgary to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Vancouver Intl to Stansted flights
Halifax to Heathrow flights
Pearson Intl to Edinburgh flights
Pierre Elliott Trudeau Intl to Stansted flights
Calgary to Gatwick flights
Pearson Intl to Manchester flights
Ottawa to Heathrow flights
Calgary to London City flights
Abbotsford to Heathrow flights
Halifax to Gatwick flights
Edmonton to Heathrow flights
Vancouver Intl to Manchester flights
Pierre Elliott Trudeau Intl to Edinburgh flights
Ottawa to Gatwick flights
Vancouver Intl to Edinburgh flights
Edmonton to Gatwick flights
Calgary to Stansted flights
Pearson Intl to Birmingham flights
Vancouver Intl to Luton flights
Winnipeg to Heathrow flights
Québec City to Heathrow flights
Winnipeg to Gatwick flights
St. John's to Heathrow flights
Calgary to Edinburgh flights
Pearson Intl to Leeds flights

Top 10 airlines flying from Ontario to London

Discover the top 10 airlines that operate flights from Ontario to London. 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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£340Average£468FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapest£361Average£467FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£366Average£521FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Porter AirlinesCheapest£371Average£479FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapest£380Average£672FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£382Average£453FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£389Average£598FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£396Average£541FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£401Average£599FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£417Average£437FlexibilityNo cancel feeOn-time71%
Search American Airlines 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 London?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ontario today with Cheapflights!

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

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

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

Need flexible booking options for your flight to London from Ontario? 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 Ontario to London become cheaper?

Of course! You can now track prices for flights from Ontario to London 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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