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Cheap flights from Ontario to London from C$ 346

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 28/9. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
11 Oct — 18 Oct1
1 adult
1 adult, Economy

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 11 September 2025.

Round-trip from

C$ 725

One-way from

C$ 346

Popular in

December

Cheapest in

February

Average price

C$ 852

Good round-trip deal

C$ 768 or less

Good one-way deal

C$ 415 or less
Air Transat
  • Air Transat
  • 30/9-7/10
  • 1 total stop
  • 17h 50m total
  • Ontario to London
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WestJet
  • WestJet
  • 28/9
  • 1 total stop
  • 10h 05m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 42 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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

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 September 2025.

Mon 13/108:40 p.m.YYZ - LGW
1 stop11h 05mMultiple Airlines
Mon 20/108:40 p.m.LGW - YYZ
1 stop20h 15mMultiple Airlines
Deal found 10/9C$ 725
Mon 3/117:40 p.m.YYZ - LHR
1 stop10h 10mIcelandair
Sun 16/118:35 p.m.LHR - YYZ
1 stop26h 40mIcelandair
Deal found 11/9C$ 726
Sat 27/96:00 p.m.YYZ - LGW
1 stop10h 50mAir Transat
Fri 3/1011:35 a.m.LGW - YYZ
1 stop12h 50mAir Transat
Deal found 10/9C$ 726
Thu 13/117:40 p.m.YYZ - LHR
1 stop18h 50mIcelandair
Wed 26/118:35 p.m.LHR - YYZ
1 stop26h 40mIcelandair
Deal found 9/9C$ 728
Sun 21/911:15 p.m.YYZ - LGW
1 stop29h 35mAir Transat
Tue 7/1011:35 a.m.LGW - YYZ
1 stop10h 50mAir Transat
Deal found 10/9C$ 728
Sun 5/1011:55 p.m.YYZ - LTN
1 stop14h 30mMultiple Airlines
Thu 16/106:00 a.m.LTN - YYZ
2 stops19h 11mMultiple Airlines
Deal found 10/9C$ 729
Wed 15/1011:35 p.m.YYZ - LHR
Nonstop7h 15mAir Canada
Thu 23/108:40 a.m.LHR - YYZ
1 stop12h 45mAir Canada
Deal found 10/9C$ 729
Thu 9/1010:45 p.m.YYZ - LGW
Nonstop7h 00mAir Transat
Thu 11/1211:40 a.m.LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 10/9C$ 729
Wed 22/104:00 p.m.YYZ - LHR
1 stop11h 35mMultiple Airlines
Mon 27/108:15 p.m.LHR - YYZ
1 stop23h 40mMultiple Airlines
Deal found 9/9C$ 730
Mon 29/910:45 p.m.YYZ - LGW
Nonstop7h 00mAir Transat
Fri 3/1011:35 a.m.LGW - YYZ
1 stop10h 50mAir Transat
Deal found 11/9C$ 730
Thu 20/116:50 p.m.YYZ - LTN
1 stop14h 10mMultiple Airlines
Thu 27/114:10 p.m.LTN - YYZ
1 stop25h 00mMultiple Airlines
Deal found 8/9C$ 732
Sun 19/106:20 p.m.YYZ - LHR
Nonstop7h 15mAir Canada
Mon 3/119:00 a.m.LHR - YYZ
1 stop12h 10mAir Canada
Deal found 9/9C$ 732

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 September 2025.
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

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sun 5/10

11:55 p.m.-7:25 p.m.

1 stop14h 30m

London Luton

Thu 16/10

6:00 a.m.-8:11 p.m.

2 stops19h 11m

C$ 729

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sat 31/1

5:25 p.m.-9:45 a.m.

1 stop11h 20m

London Gatwick

Sun 15/2

11:40 a.m.-12:50 a.m.

1 stop18h 10m

C$ 737

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Wed 3/12

9:35 p.m.-9:45 a.m.

Nonstop7h 10m

London Gatwick

Tue 16/12

11:40 a.m.-3:00 p.m.

Nonstop8h 20m

C$ 740

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sat 10/1

3:55 p.m.-9:45 a.m.

1 stop12h 50m

London Gatwick

Wed 11/2

11:40 a.m.-6:25 p.m.

1 stop11h 45m

C$ 740

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 1/12

9:35 p.m.-9:45 a.m.

Nonstop7h 10m

London Gatwick

Tue 16/12

11:40 a.m.-3:00 p.m.

Nonstop8h 20m

C$ 740

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Tue 13/1

6:45 a.m.-9:45 a.m.

1 stop22h 00m

London Gatwick

Mon 16/2

11:40 a.m.-6:25 p.m.

1 stop11h 45m

C$ 740

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Tue 13/1

6:45 a.m.-9:45 a.m.

1 stop22h 00m

London Gatwick

Thu 12/2

11:40 a.m.-10:10 p.m.

1 stop15h 30m

C$ 740

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Thu 30/10

7:35 p.m.-2:50 p.m.

1 stop15h 15m

London Stansted

Tue 11/11

9:45 p.m.-11:15 a.m.

1 stop18h 30m

C$ 741

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 21/9

10:15 p.m.-7:25 a.m.

1 stop28h 10m

London Stansted

Thu 2/10

6:50 a.m.-2:10 p.m.

1 stop12h 20m

C$ 750

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 15/9

7:40 a.m.-9:50 a.m.

1 stop21h 10m

London Gatwick

Tue 7/10

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

Nonstop8h 00m

C$ 773

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/9

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 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$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 856). 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 September 2025.

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 September 2025.

The most flights from CAON to LON are scheduled on a Sunday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 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 10m. Air Transat provides one of the quickest options available for as low as C$ 740. Region of Ontario and London are separated by a distance of 5734 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$ 351. Users have also found prices from C$ 352 and C$ 405 on TAP AIR PORTUGAL and Air Canada, 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 KLM (90%), Air France (90%) or Delta (90%) 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$ 2,145 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 414 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 653.

  • 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$ 560). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 856). 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
Brentford
Sutton
Hounslow
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Southall

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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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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 September 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 220AverageC$ 586FlexibilityNo cancel feeOn-time60%
Search WestJet flights
PLAYCheapestC$ 485AverageC$ 581FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
WestJet EncoreCheapestC$ 553AverageC$ 705FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 580AverageC$ 894FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 602AverageC$ 710FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 631AverageC$ 910FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 646AverageC$ 851FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 694AverageC$ 861FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapestC$ 702AverageC$ 873FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapestC$ 709AverageC$ 1,054FlexibilityNo 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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