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Cheap flights from Ontario to London from C$ 402

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 2/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
15 Apr — 22 Apr1
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 16 March 2026.

Wed 10/610:05 p.m.
YYZ
-
STN
1 stop17h 25m
Multiple Airlines
Mon 15/68:30 a.m.
STN
-
YYZ
1 stop12h 20m
Multiple Airlines
Deal found 15/3C$ 712
Mon 6/411:10 p.m.
YYZ
-
LHR
1 stop31h 45m
Icelandair
Thu 30/41:05 p.m.
LHR
-
YYZ
1 stop14h 00m
Icelandair
Deal found 12/3C$ 722
Mon 13/411:10 p.m.
YYZ
-
LGW
1 stop10h 30m
Icelandair
Mon 20/43:40 p.m.
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 15/3C$ 722
Mon 4/54:15 p.m.
YYZ
-
LHR
1 stop10h 35m
American Airlines
Fri 15/512:30 p.m.
LHR
-
YYZ
1 stop14h 06m
American Airlines
Deal found 15/3C$ 723
Wed 15/411:10 p.m.
YYZ
-
LTN
2 stops17h 05m
Multiple Airlines
Tue 28/49:40 a.m.
LTN
-
YYZ
2 stops14h 30m
Multiple Airlines
Deal found 11/3C$ 723
Wed 15/48:45 p.m.
YYZ
-
STN
2 stops21h 35m
Multiple Airlines
Tue 28/46:30 a.m.
STN
-
YYZ
2 stops17h 40m
Multiple Airlines
Deal found 11/3C$ 723
Wed 15/411:10 p.m.
YYZ
-
LGW
1 stop10h 30m
Icelandair
Wed 22/43:40 p.m.
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 14/3C$ 724
Mon 13/48:45 p.m.
YYZ
-
LHR
1 stop18h 35m
Icelandair
Sun 26/49:25 p.m.
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 12/3C$ 726
Wed 15/411:10 p.m.
YYZ
-
LGW
2 stops12h 55m
Multiple Airlines
Tue 28/49:40 a.m.
LGW
-
YYZ
2 stops14h 30m
Multiple Airlines
Deal found 11/3C$ 726
Mon 13/48:45 p.m.
YYZ
-
LHR
1 stop18h 35m
Icelandair
Fri 24/49:25 p.m.
LHR
-
YYZ
1 stop29h 40m
Icelandair
Deal found 12/3C$ 727
Tue 9/68:45 p.m.
YYZ
-
LTN
2 stops13h 45m
Multiple Airlines
Tue 16/69:40 a.m.
LTN
-
YYZ
2 stops17h 25m
Multiple Airlines
Deal found 12/3C$ 727
Mon 18/511:10 p.m.
YYZ
-
LGW
2 stops15h 55m
Multiple Airlines
Thu 28/511:05 a.m.
LGW
-
YYZ
2 stops13h 05m
Multiple Airlines
Deal found 11/3C$ 727

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 16 March 2026.

Round-trip from

C$ 712

One-way from

C$ 402

Popular in

December

Cheapest in

May

Average price

C$ 841

Good round-trip deal

C$ 728 or less

Good one-way deal

C$ 66 or less
10/6-15/6
  • 10/6-15/6
  • 2 total stops
  • 29h 45m total
  • Ontario to London
Search Deals
23/3
  • 23/3
  • 2 total stops
  • 15h 55m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 16 March 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

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 4/5

11:15 p.m.-9:50 a.m.

1 stop29h 35m

London Gatwick

Fri 15/5

12:40 p.m.-3:40 p.m.

Nonstop8h 00m

C$ 781

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sat 2/5

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

Nonstop6h 45m

London Gatwick

Mon 18/5

12:40 p.m.-7:32 p.m.

1 stop11h 52m

C$ 830

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Thu 21/5

9:30 p.m.-12:15 a.m.

1 stop21h 45m

London Luton

Wed 3/6

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

1 stop25h 30m

C$ 838

MontrealLondon

YUL - STN

YULSTN

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

6:50 p.m.-4:30 p.m.

1 stop16h 40m

London Stansted

Mon 1/6

3:35 p.m.-11:35 a.m.

1 stop25h 00m

C$ 849

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Thu 14/5

4:00 p.m.-9:50 a.m.

1 stop12h 50m

London Gatwick

Wed 27/5

11:35 a.m.-5:25 p.m.

1 stop10h 50m

C$ 853

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Fri 15/5

6:55 p.m.-9:50 a.m.

1 stop9h 55m

London Gatwick

Wed 27/5

11:35 a.m.-10:20 p.m.

1 stop15h 45m

C$ 853

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 15/6

10:45 p.m.-3:35 p.m.

1 stop11h 50m

London Gatwick

Mon 22/6

12:05 p.m.-9:10 p.m.

2 stops14h 05m

C$ 867

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 1/6

7:15 p.m.-10:05 p.m.

1 stop21h 50m

London Luton

Tue 16/6

5:45 p.m.-11:00 a.m.

1 stop22h 15m

C$ 874

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Thu 21/5

7:05 p.m.-7:55 a.m.

1 stop31h 50m

London Gatwick

Wed 3/6

11:35 a.m.-10:20 p.m.

1 stop15h 45m

C$ 885
Quickest round-trip

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 12/4

11:45 p.m.-11:50 a.m.

Nonstop7h 05m

London Heathrow

Sun 19/4

12:05 p.m.-2:55 p.m.

Nonstop7h 50m

C$ 888

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/3

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, May is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 620). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 816). 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 March 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 March 2026.

The most flights from CAON to LON are scheduled on a Monday (40 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (29 on average).

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

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 11h 50m. Air Transat provides one of the quickest options available for as low as C$ 867. 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$ 60. Users have also found prices from C$ 317 and C$ 325 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 SriLankan Airlines (70%), American Airlines (70%) or Aer Lingus (70%) 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$ 2,109 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 526 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 733.

  • 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, May is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 620). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 816). 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
Twickenham
Sutton
Gatwick
Slough
Marlow
Cobham
Romford
Watford
Bedford
Luton
High Wycombe
Hounslow

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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.
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Pierre Elliott Trudeau Intl to Southend flights
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Edmonton to Gatwick flights
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Halifax to London City flights
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Abbotsford to Gatwick flights
Winnipeg to Heathrow flights
Vancouver Intl to Manchester flights
Toronto Island to Manchester flights
Halifax to Luton flights
Edmonton to London City flights
Calgary to Edinburgh flights
Edmonton to Stansted flights
Halifax to Edinburgh flights
Victoria to Heathrow 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 16 March 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 218AverageC$ 593FlexibilityNo cancel feeOn-time60%
Search WestJet flights
LufthansaCheapestC$ 425AverageC$ 963FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
WestJet EncoreCheapestC$ 547AverageC$ 698FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 574AverageC$ 880FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 596AverageC$ 808FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 598AverageC$ 954FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 642AverageC$ 756FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
American AirlinesCheapestC$ 703AverageC$ 897FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
British AirwaysCheapestC$ 707AverageC$ 892FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapestC$ 712AverageC$ 1,067FlexibilityNo 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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