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Cheap flights from Ontario to London from C$ 331

YYZ — LON
15 Oct — 22 Oct1
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

Tue 24/117:40 p.m. -
1 stop18h 50m
Wed 9/128:35 p.m. -
1 stop26h 40m
Deal found 13/9C$ 658
Fri 27/117:40 p.m. -
1 stop18h 50m
Sat 5/128:35 p.m. -
1 stop26h 40m
Deal found 11/9C$ 661
Tue 24/117:40 p.m. -
1 stop10h 15m
Wed 9/1211:55 a.m. -
1 stop11h 20m
Deal found 13/9C$ 705
Fri 16/108:45 p.m. -
1 stop10h 10m
Thu 22/109:25 p.m. -
1 stop26h 45m
Deal found 13/9C$ 710
Thu 5/119:35 p.m. -
Nonstop7h 10m
Mon 9/1111:40 a.m. -
Nonstop8h 20m
Deal found 13/9C$ 732
Fri 27/119:35 p.m. -
Nonstop7h 10m
Sat 5/1211:40 a.m. -
Nonstop8h 20m
Deal found 11/9C$ 774
Tue 22/98:19 a.m. -
1 stop18h 36m
Sun 11/109:40 a.m. -
1 stop11h 50m
Deal found 15/9C$ 778
Sun 4/105:35 p.m. -
1 stop14h 50m
Tue 20/109:40 a.m. -
1 stop11h 10m
Deal found 13/9C$ 778
Thu 15/1010:45 p.m. -
Nonstop7h 00m
Wed 21/1011:35 a.m. -
1 stop11h 05m
Deal found 14/9C$ 778
Sat 3/1011:55 p.m. -
1 stop26h 55m
Wed 21/108:25 p.m. -
1 stop22h 45m
Deal found 11/9C$ 778
Fri 2/104:55 p.m. -
1 stop10h 00m
Sun 11/109:40 a.m. -
1 stop11h 50m
Deal found 11/9C$ 779
Tue 13/105:35 p.m. -
1 stop10h 40m
Tue 20/109:40 a.m. -
1 stop11h 10m
Deal found 13/9C$ 779

Find flight deals from Ontario to London

Round-trip from

C$ 658

One-way from

C$ 331

Popular in

December

Cheapest in

February

Average price

C$ 890

Good round-trip deal

C$ 691 or less

Good one-way deal

C$ 375 or less
Icelandair
  • Icelandair
  • 24/11-9/12
  • 2 total stops
  • 45h 30m total
  • Ontario to London
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1/10-31/12
  • 1/10-31/12
  • 1 total stop
  • 29h 25m total
  • Ontario to London
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Highest demand for flights based on searches. 1% potential increase in price (C$ 16 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 36 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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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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Cheapflights Fare Finder

 
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 Montreal Pierre Elliott Trudeau Intl - STN London Stansted

YULSTN

Montreal Pierre Elliott Trudeau Intl

Mon 7/12

8:15 p.m.-5:05 p.m.

1 stop15h 50m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 392

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - STN London Stansted

YULSTN

Montreal Pierre Elliott Trudeau Intl

Fri 23/10

7:20 p.m.-8:50 a.m.

2 stops56h 30m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 398

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Fri 11/12

7:25 p.m.-10:20 p.m.

1 stop21h 55m

London Luton

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 399

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Fri 16/10

11:40 p.m.-11:55 p.m.

1 stop19h 15m

London Luton

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 401

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - STN London Stansted

YULSTN

Montreal Pierre Elliott Trudeau Intl

Wed 14/10

7:00 p.m.-11:40 p.m.

1 stop23h 40m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 405

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Fri 11/12

7:25 p.m.-1:45 p.m.

1 stop13h 20m

London Gatwick

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 408

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Sat 10/10

10:00 a.m.-9:50 a.m.

1 stop18h 50m

London Gatwick

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 431

TorontoLondon

YTZ Toronto Island - LHR London Heathrow

YTZLHR

Toronto Island

Thu 4/2

12:30 p.m.-7:10 a.m.

1 stop13h 40m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 470

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Sat 27/2

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

Nonstop7h 10m

London Gatwick

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 470

TorontoLondon

YTZ Toronto Island - LHR London Heathrow

YTZLHR

Toronto Island

Wed 3/2

6:30 p.m.-7:10 a.m.

1 stop31h 40m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 470

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/9

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

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$ 812). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,295). 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?

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

The most flights from CAON to LON are scheduled on a Monday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (24 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$ 824 and C$ 1,062 in November.
The cheapest round-trip price found within the last 5 days was C$ 658 on Icelandair (24 Nov-9 Dec).

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 50 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

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

    A quick flight from Region of Ontario to London can take about 7h 15m. Air Transat provides one of the quickest options available for as low as C$ 897. Region of Ontario and London are separated by a distance of 5702 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$ 57. Users have also found prices from C$ 329 and C$ 379 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 KLM (81%), Air France (81%) or Delta (81%) 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$ 2,407 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$ 650.

  • 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$ 812). Flying from Region of Ontario to London in December is currently the most expensive (average of C$ 1,295). 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
Wembley
Watford
High Wycombe

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Alternative routes for Ontario to London

Pearson Intl to Heathrow flights
Vancouver Intl to Heathrow flights
Pearson Intl to Gatwick flights
Pearson Intl to London City flights
Toronto Island to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights
Pearson Intl to Stansted flights
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Pearson Intl to Luton flights
Vancouver Intl to Gatwick flights
Toronto Island to Gatwick flights
Vancouver Intl to London City flights
Vancouver Intl to Stansted flights
Pierre Elliott Trudeau Intl to London City flights
Abbotsford to Heathrow flights
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Pearson Intl to Manchester flights
Pierre Elliott Trudeau Intl to Gatwick flights
Halifax to Heathrow flights
Pierre Elliott Trudeau Intl to Luton flights
Pearson Intl to Edinburgh flights
Calgary to Gatwick flights
Vancouver Intl to Luton flights
Calgary to London City flights
Ottawa to Heathrow flights
Pierre Elliott Trudeau Intl to Southend flights
Calgary to Luton flights
Halifax to Gatwick flights
Calgary to Stansted flights
Edmonton to Heathrow flights
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Ottawa to London City flights
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Toronto Island to Edinburgh flights
Halifax to London City flights
Edmonton to Gatwick flights
Victoria to Heathrow flights
Halifax to Stansted flights
Winnipeg to Heathrow flights
Edmonton to London City flights
Pearson Intl to Birmingham flights
Kelowna to Heathrow flights
Winnipeg to Gatwick flights
Calgary to Southend flights
Calgary to Edinburgh flights
Abbotsford to Gatwick flights
Victoria to Gatwick flights
Ottawa to Stansted flights

Top 10 airlines flying from Ontario to London

AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 481AverageC$ 973FlexibilityNo cancel feeOn-time72%
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TAP AIR PORTUGALCheapestC$ 604AverageC$ 826FlexibilityNo cancel feeOn-timeN/A
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IcelandairCheapestC$ 640AverageC$ 756FlexibilityNo cancel feeOn-time76%
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Air TransatCheapestC$ 680AverageC$ 918FlexibilityNo cancel feeOn-time50%
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IberiaCheapestC$ 707AverageC$ 981FlexibilityNo cancel feeOn-time77%
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Aer LingusCheapestC$ 736AverageC$ 1,055FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
KLMCheapestC$ 752AverageC$ 967FlexibilityNo cancel feeOn-time75%
Search KLM flights
American AirlinesCheapestC$ 761AverageC$ 942FlexibilityNo cancel feeOn-time71%
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Air FranceCheapestC$ 774AverageC$ 1,038FlexibilityNo cancel feeOn-time77%
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British AirwaysCheapestC$ 777AverageC$ 1,077FlexibilityNo cancel feeOn-time70%
Search British Airways flights

Fly with Cheapflights

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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