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Cheap flights from Ontario to London from C$ 387

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 21/7. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
11 Jul — 18 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap 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 11 June 2026.

Mon 21/98:35 p.m.
YUL
-
LGW
1 stop9h 10m
Air Transat
Mon 5/109:40 a.m.
LGW
-
YUL
1 stop12h 22m
Air Transat
Deal found 11/6C$ 783
Sun 4/106:40 p.m.
YUL
-
LHR
Nonstop6h 50m
Lufthansa
Fri 16/107:25 a.m.
LHR
-
YUL
1 stop16h 25m
Lufthansa
Deal found 8/6C$ 783
Tue 9/610:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Porter Airlines
Wed 17/612:40 p.m.
LGW
-
YUL
1 stop11h 52m
Porter Airlines
Deal found 8/6C$ 785
Thu 11/64:10 p.m.
YUL
-
LHR
1 stop11h 25m
Air Canada
Wed 17/62:10 p.m.
LHR
-
YUL
1 stop11h 09m
Air Canada
Deal found 10/6C$ 785
Thu 11/63:10 p.m.
YUL
-
LGW
1 stop11h 45m
Air Transat
Wed 24/612:40 p.m.
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 8/6C$ 786
Fri 11/94:40 p.m.
YUL
-
LHR
1 stop10h 55m
Multiple Airlines
Thu 17/98:45 a.m.
LHR
-
YUL
1 stop11h 15m
Multiple Airlines
Deal found 9/6C$ 786
Sat 12/96:00 p.m.
YUL
-
LGW
1 stop11h 45m
Air Transat
Sat 26/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 9/6C$ 787
Tue 15/98:30 p.m.
YUL
-
LHR
1 stop10h 20m
Multiple Airlines
Fri 25/96:00 a.m.
LHR
-
YUL
1 stop14h 00m
Multiple Airlines
Deal found 8/6C$ 787
Fri 12/610:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Mon 22/612:40 p.m.
LGW
-
YUL
1 stop11h 50m
Air Transat
Deal found 8/6C$ 789
Fri 12/69:20 p.m.
YUL
-
LHR
1 stop18h 40m
Air Canada
Fri 19/66:50 a.m.
LHR
-
YUL
1 stop9h 15m
Air Canada
Deal found 10/6C$ 789
Thu 17/95:00 p.m.
YUL
-
LGW
1 stop9h 55m
Air Transat
Sun 27/912:40 p.m.
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 9/6C$ 790
Tue 16/68:30 p.m.
YUL
-
LHR
1 stop10h 20m
Air Canada
Sat 20/66:00 a.m.
LHR
-
YUL
1 stop12h 50m
Air Canada
Deal found 9/6C$ 790

Find flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 11 June 2026.

Round-trip from

C$ 783

One-way from

C$ 387

Popular in

July

Cheapest in

February

Average price

C$ 999

Good round-trip deal

C$ 796 or less

Good one-way deal

C$ 438 or less
Air Transat
  • Air Transat
  • 21/9-26/9
  • 2 total stops
  • 21h 47m total
  • Ontario to London
Search Deals
21/7
  • 21/7
  • 2 total stops
  • 40h 00m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 227 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Ontario to London (LON).
Search Deals
Price to beat on a one-way flight from Ontario to London (LON).
Search Deals

Cheapflights Fare Finder

 
Customize 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 629,999 searches. Data last updated 11 June 2026.
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 9/10

8:30 p.m.-11:50 a.m.

1 stop10h 20m

London Heathrow

Sun 18/10

9:00 a.m.-6:50 p.m.

1 stop14h 50m

C$ 794

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

10:10 p.m.-10:00 a.m.

Nonstop6h 50m

London Heathrow

Sun 13/9

9:30 a.m.-12:00 p.m.

Nonstop7h 30m

C$ 799

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 6/9

4:40 p.m.-8:25 a.m.

1 stop10h 45m

London Gatwick

Sun 13/9

9:05 a.m.-3:00 p.m.

1 stop10h 55m

C$ 803

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sat 5/9

7:15 p.m.-9:00 p.m.

1 stop20h 45m

London Luton

Sat 19/9

4:50 p.m.-11:00 a.m.

1 stop23h 10m

C$ 808

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 6/7

7:15 p.m.-8:55 p.m.

1 stop20h 40m

London Luton

Wed 22/7

7:50 p.m.-11:00 a.m.

1 stop20h 10m

C$ 811

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 6/7

7:15 p.m.-8:55 p.m.

1 stop20h 40m

London Luton

Mon 13/7

7:25 p.m.-11:00 a.m.

1 stop20h 35m

C$ 811

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sun 19/7

4:55 p.m.-7:55 a.m.

1 stop10h 00m

London Gatwick

Tue 28/7

9:40 a.m.-4:33 p.m.

1 stop11h 53m

C$ 813

TorontoLondon

YYZ - SEN

YYZSEN

Toronto Pearson Intl

Sun 20/9

11:45 p.m.-7:35 p.m.

1 stop14h 50m

London Southend

Wed 30/9

4:50 p.m.-5:10 p.m.

1 stop29h 20m

C$ 818

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Tue 22/9

10:05 p.m.-9:50 a.m.

Nonstop6h 45m

London Gatwick

Sat 26/9

9:40 a.m.-5:02 p.m.

1 stop12h 22m

C$ 821

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Wed 15/7

8:25 a.m.-9:50 a.m.

1 stop20h 25m

London Gatwick

Tue 28/7

9:40 a.m.-4:33 p.m.

1 stop11h 53m

C$ 821

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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 round-trip 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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 814). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,291). 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 11 June 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 11 June 2026.

The most flights from CAON to LON are scheduled on a Monday (47 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (31 on average).

How much does it cost to fly round-trip from Region of Ontario to London?

How far ahead should I book a flight from Region of Ontario to London?

To ensure you get the cheapest price possible for a flight from Region of Ontario to London, you should look to book at least 86 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 10h. Lufthansa provides one of the quickest options available for as low as C$ 813. Region of Ontario and London are separated by a distance of 5724 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as C$ 61. Users have also found prices from C$ 305 and C$ 334 on TAP AIR PORTUGAL and Air Transat, respectively.

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

    The most popular flight routes from Region of Ontario to London are Toronto Pearson Intl - London Heathrow, Toronto Pearson Intl - London Gatwick and Toronto Pearson Intl - London Stansted.

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

    Consider KLM (87%), Air France (87%) or Delta (87%) when booking your flight. These represent the most reliable airlines when flying from Region of Ontario to London.

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

    On average you can expect to pay C$ 2,282 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 528 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 682.

  • 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 vacation 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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 814). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,291). 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
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Hounslow
Slough
Marlow
Cobham
Watford
Luton
High Wycombe

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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
Vancouver Intl to Heathrow flights
Pearson Intl to Gatwick flights
Pearson Intl to Stansted flights
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Vancouver Intl to Gatwick flights
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Toronto Island to Heathrow flights
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Pierre Elliott Trudeau Intl to Stansted flights
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Pierre Elliott Trudeau Intl to Luton flights
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Calgary to London City flights
Ottawa to Heathrow flights
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Abbotsford to Gatwick flights
Ottawa to Gatwick flights
Pierre Elliott Trudeau Intl to Edinburgh flights
Calgary to Stansted flights
Edmonton to Heathrow flights
Calgary to Luton flights
Vancouver Intl to Edinburgh flights
Halifax to Gatwick flights
Vancouver Intl to Manchester flights
Edmonton to Gatwick flights
Toronto Island to Manchester flights
Toronto Island to Edinburgh flights
Ottawa to London City flights
Ottawa to Stansted flights
Edmonton to London City flights
Halifax to London City flights
Victoria to Heathrow flights
Calgary to Edinburgh flights
Pearson Intl to Birmingham flights
Kelowna to Heathrow flights
Edmonton to Stansted flights
Québec City to Heathrow flights
Halifax to Stansted 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 629,999 searches. Data last updated 11 June 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 220AverageC$ 632FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Porter AirlinesCheapestC$ 535AverageC$ 1,027FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
TAP AIR PORTUGALCheapestC$ 606AverageC$ 836FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapestC$ 641AverageC$ 761FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapestC$ 681AverageC$ 943FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 717AverageC$ 1,142FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapestC$ 733AverageC$ 1,028FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapestC$ 747AverageC$ 902FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapestC$ 757AverageC$ 1,045FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapestC$ 761AverageC$ 1,121FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers 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?

Cheapflights helps you search for flights from Ontario to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Ontario to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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?

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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