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Cheap flights from Ontario to London from C$ 364

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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
26 Aug — 2 Sep1
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 27 July 2026.

Sat 5/911:35 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Thu 10/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 23/7C$ 728
Wed 9/98:35 p.m.
YUL
-
LGW
1 stop30h 20m
Air Transat
Wed 16/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 26/7C$ 731
Thu 17/95:00 p.m.
YUL
-
LGW
1 stop9h 55m
Air Transat
Mon 12/1012:40 p.m.
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 25/7C$ 733
Thu 8/1010:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Mon 12/1012:40 p.m.
LGW
-
YUL
1 stop11h 50m
Air Transat
Deal found 25/7C$ 734
Wed 16/98:35 p.m.
YUL
-
LGW
1 stop30h 20m
Air Transat
Sun 20/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 23/7C$ 737
Sat 12/910:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Fri 25/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 22/7C$ 738
Mon 7/93:10 p.m.
YUL
-
LGW
1 stop14h 35m
Porter Airlines
Wed 16/99:40 a.m.
LGW
-
YUL
1 stop14h 52m
Porter Airlines
Deal found 23/7C$ 740
Tue 15/910:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Wed 30/911:35 a.m.
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 26/7C$ 741
Sat 19/94:15 p.m.
YUL
-
LGW
1 stop13h 30m
Air Transat
Sun 4/1012:40 p.m.
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 26/7C$ 743
Tue 15/96:45 a.m.
YUL
-
LGW
1 stop23h 00m
Air Transat
Fri 25/912:40 p.m.
LGW
-
YUL
1 stop11h 50m
Air Transat
Deal found 26/7C$ 744
Tue 15/910:05 p.m.
YUL
-
LGW
Nonstop6h 45m
Air Transat
Wed 23/912:40 p.m.
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 22/7C$ 745
Thu 1/1010:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Thu 8/106:00 a.m.
LHR
-
YUL
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 26/7C$ 752

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 27 July 2026.

Round-trip from

C$ 728

One-way from

C$ 364

Popular in

December

Cheapest in

February

Average price

C$ 1,158

Good round-trip deal

C$ 661 or less

Good one-way deal

C$ 454 or less
Air Transat
  • Air Transat
  • 5/9-10/9
  • Nonstop
  • 14h 25m total
  • Ontario to London
Search Deals
Air Transat
  • Air Transat
  • 8/9
  • 1 total stop
  • 10h 00m total
  • Ontario to London
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 27 July 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 - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Tue 29/9

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

Nonstop6h 45m

London Gatwick

Sat 10/10

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

1 stop12h 22m

C$ 758

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 5/9

4:55 p.m.-11:20 a.m.

1 stop13h 25m

London Gatwick

Tue 15/9

9:40 a.m.-4:30 p.m.

1 stop11h 50m

C$ 761

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Wed 9/9

4:55 p.m.-9:50 a.m.

1 stop11h 55m

London Gatwick

Tue 15/9

9:40 a.m.-4:30 p.m.

1 stop11h 50m

C$ 761

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 4/10

8:35 p.m.-10:45 a.m.

1 stop9h 10m

London Gatwick

Fri 16/10

11:35 a.m.-2:15 p.m.

Nonstop7h 40m

C$ 768

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Fri 11/9

8:35 p.m.-7:55 a.m.

1 stop30h 20m

London Gatwick

Mon 14/9

11:35 a.m.-2:15 p.m.

Nonstop7h 40m

C$ 769

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 22/9

4:55 p.m.-9:50 a.m.

1 stop11h 55m

London Gatwick

Mon 28/9

11:35 a.m.-1:21 p.m.

1 stop30h 46m

C$ 785

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 12/10

9:30 p.m.-9:35 p.m.

1 stop19h 05m

London Luton

Sun 18/10

6:10 p.m.-2:40 p.m.

1 stop25h 30m

C$ 817

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Thu 17/9

5:00 p.m.-7:55 a.m.

1 stop9h 55m

London Gatwick

Wed 14/10

12:40 p.m.-12:37 a.m.

1 stop16h 57m

C$ 830

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Mon 7/9

7:15 p.m.-9:25 p.m.

1 stop21h 10m

London Stansted

Mon 14/9

10:25 p.m.-11:00 a.m.

1 stop17h 35m

C$ 852

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 14/10

9:30 p.m.-6:30 p.m.

1 stop16h 00m

London Luton

Wed 21/10

6:10 p.m.-2:40 p.m.

1 stop25h 30m

C$ 854

Flights are sorted by cheapest round-trip flights first.

Deals found on 23/7

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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 820). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,268). 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 27 July 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 27 July 2026.

The most flights from CAON to LON are scheduled on a Monday (50 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (37 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to London flights typically cost between C$ 992 and C$ 1,360 in September.
The cheapest round-trip price found within the last 5 days was C$ 758 on Multiple Airlines (8 Sep-7 Oct).

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 85 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 6h 45m. Air Transat provides one of the quickest options available for as low as C$ 758. Region of Ontario and London are separated by a distance of 5243 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$ 262. Users have also found prices from C$ 308 and C$ 371 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 City.

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

    Consider Singapore Airlines (87%), KLM (86%) or Air France (86%) 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$ 2,245 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 539 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 717.

  • 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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 820). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,268). 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
Luton
Slough
Marlow
Cobham
Hounslow
Watford
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
Pearson Intl to Gatwick flights
Vancouver Intl to Heathrow flights
Pearson Intl to London City flights
Vancouver Intl to Gatwick flights
Pearson Intl to Stansted flights
Toronto Island to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to Luton flights
Toronto Island to Gatwick flights
Vancouver Intl to Stansted flights
Vancouver Intl to London City flights
Calgary to Heathrow flights
Pearson Intl to Edinburgh flights
Pierre Elliott Trudeau Intl to Gatwick flights
Abbotsford to Heathrow flights
Halifax to Heathrow flights
Pierre Elliott Trudeau Intl to Stansted flights
Ottawa to Heathrow flights
Pierre Elliott Trudeau Intl to London City flights
Pierre Elliott Trudeau Intl to Luton flights
Vancouver Intl to Luton flights
Pearson Intl to Manchester flights
Calgary to Gatwick flights
Pierre Elliott Trudeau Intl to Edinburgh flights
Calgary to London City flights
Edmonton to Heathrow flights
Calgary to Stansted flights
Pierre Elliott Trudeau Intl to Southend flights
Halifax to Gatwick flights
Ottawa to Gatwick flights
Vancouver Intl to Edinburgh flights
Calgary to Luton flights
Toronto Island to Edinburgh flights
Edmonton to Gatwick flights
Ottawa to London City flights
Ottawa to Stansted flights
Vancouver Intl to Manchester flights
Halifax to Stansted flights
Abbotsford to Gatwick flights
Edmonton to London City flights
Halifax to London City flights
Edmonton to Stansted flights
Winnipeg to Heathrow flights
Calgary to Edinburgh flights
Winnipeg to Gatwick flights
Halifax to Luton flights
Toronto Island to Manchester 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 27 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 606AverageC$ 985FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
TAP AIR PORTUGALCheapestC$ 612AverageC$ 847FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapestC$ 648AverageC$ 766FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapestC$ 689AverageC$ 941FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IberiaCheapestC$ 716AverageC$ 999FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapestC$ 736AverageC$ 1,011FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapestC$ 746AverageC$ 1,011FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Porter AirlinesCheapestC$ 759AverageC$ 1,058FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
KLMCheapestC$ 760AverageC$ 944FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapestC$ 768AverageC$ 1,116FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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