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Cheap flights from Ontario to London from C$ 323

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 26/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
27 Feb — 6 Mar1
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 28 January 2026.

Mon 9/29:45 p.m.
YUL
-
LGW
1 stop13h 00m
TAP AIR PORTUGAL
Wed 18/210:40 a.m.
LGW
-
YUL
1 stop14h 35m
TAP AIR PORTUGAL
Deal found 26/1C$ 663
Wed 4/29:45 p.m.
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Mon 9/28:15 a.m.
LHR
-
YUL
1 stop17h 00m
TAP AIR PORTUGAL
Deal found 26/1C$ 663
Mon 27/410:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Wed 6/51:45 p.m.
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 27/1C$ 664
Wed 4/29:45 p.m.
YUL
-
LHR
1 stop14h 45m
TAP AIR PORTUGAL
Sun 8/212:25 p.m.
LHR
-
YUL
1 stop12h 50m
TAP AIR PORTUGAL
Deal found 27/1C$ 666
Wed 4/39:45 p.m.
YUL
-
LGW
1 stop12h 20m
TAP AIR PORTUGAL
Wed 11/310:40 a.m.
LGW
-
YUL
1 stop14h 35m
TAP AIR PORTUGAL
Deal found 27/1C$ 667
Mon 9/29:45 p.m.
YUL
-
LHR
1 stop18h 50m
TAP AIR PORTUGAL
Wed 18/28:15 a.m.
LHR
-
YUL
1 stop17h 00m
TAP AIR PORTUGAL
Deal found 26/1C$ 668
Sun 22/210:15 a.m.
YUL
-
LGW
1 stop18h 30m
Air Transat
Mon 2/311:40 a.m.
LGW
-
YUL
1 stop26h 37m
Air Transat
Deal found 27/1C$ 673
Wed 18/29:45 p.m.
YUL
-
LHR
1 stop16h 10m
TAP AIR PORTUGAL
Tue 24/26:30 p.m.
LHR
-
YUL
1 stop30h 45m
TAP AIR PORTUGAL
Deal found 27/1C$ 675
Mon 27/410:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Mon 11/51:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 26/1C$ 677
Wed 29/410:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Mon 11/58:00 a.m.
LHR
-
YUL
1 stop18h 10m
TAP AIR PORTUGAL
Deal found 26/1C$ 678
Mon 13/410:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Mon 20/46:00 a.m.
LHR
-
YUL
1 stop20h 10m
TAP AIR PORTUGAL
Deal found 27/1C$ 682
Mon 26/19:45 p.m.
YUL
-
LGW
1 stop31h 05m
TAP AIR PORTUGAL
Thu 5/24:00 p.m.
LGW
-
YUL
1 stop33h 15m
TAP AIR PORTUGAL
Deal found 25/1C$ 690

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 28 January 2026.

Round-trip from

C$ 663

One-way from

C$ 323

Popular in

December

Cheapest in

February

Average price

C$ 748

Good round-trip deal

C$ 158 or less

Good one-way deal

C$ 493 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 9/2-18/2
  • 2 total stops
  • 27h 35m total
  • Ontario to London
Search Deals
26/3
  • 26/3
  • 3 total stops
  • 21h 05m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 28 January 2026.
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 1/3

7:40 p.m.-10:00 p.m.

2 stops21h 20m

London Luton

Mon 9/3

8:50 a.m.-7:15 p.m.

2 stops14h 25m

C$ 708

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sat 14/2

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

Nonstop7h 10m

London Gatwick

Sun 1/3

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

Nonstop8h 20m

C$ 708

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 17/2

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

Nonstop7h 10m

London Gatwick

Fri 27/2

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

Nonstop8h 20m

C$ 708

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 17/2

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

Nonstop7h 10m

London Gatwick

Wed 25/2

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

Nonstop8h 20m

C$ 708

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 16/2

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

Nonstop7h 10m

London Gatwick

Sun 1/3

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

Nonstop8h 20m

C$ 708

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 8/2

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

Nonstop7h 10m

London Gatwick

Wed 25/2

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

Nonstop8h 20m

C$ 709

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 28/4

7:35 a.m.-1:25 p.m.

2 stops24h 50m

London Luton

Wed 6/5

6:15 a.m.-1:20 p.m.

1 stop12h 05m

C$ 741

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 2/3

10:30 p.m.-10:50 a.m.

Nonstop7h 20m

London Heathrow

Tue 10/3

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

1 stop12h 00m

C$ 753

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 25/2

9:15 p.m.-9:35 a.m.

Nonstop7h 20m

London Heathrow

Wed 4/3

8:40 a.m.-3:40 p.m.

1 stop12h 00m

C$ 755

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 3/3

7:35 p.m.-9:45 a.m.

1 stop9h 10m

London Luton

Thu 12/3

8:00 p.m.-11:15 a.m.

1 stop19h 15m

C$ 755

Flights are sorted by cheapest round-trip flights first.

Deals found on 26/1

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, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 593). 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 28 January 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 28 January 2026.

The most flights from CAON to LON are scheduled on a Monday (32 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (19 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$ 708. Region of Ontario and London are separated by a distance of 5734 km. Most flights are nonstop.

  • 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$ 306 and C$ 309 on Air Transat and TAP AIR PORTUGAL, 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 Montreal Pierre Elliott Trudeau Intl - London Heathrow.

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

    Consider KLM (69%), Air France (69%) or Delta (69%) 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$ 2,081 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 511 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 636.

  • 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, March is the cheapest month in which you can book a flight from Region of Ontario to London (average of C$ 593). 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
Sutton
Twickenham
Gatwick
Slough
Marlow
Cobham
Milton Keynes
Romford
Bedford
Watford
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.
Pearson Intl to Heathrow flights
Vancouver Intl to Heathrow flights
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Pierre Elliott Trudeau Intl to Heathrow flights
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Ottawa to Gatwick flights
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Winnipeg to Gatwick flights
Victoria to Heathrow flights
Toronto Island to Manchester flights
St. John's to Heathrow flights
Halifax to London City flights
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Edmonton to London City flights
Vancouver Intl to Luton flights
Pearson Intl to Birmingham flights
Québec City to Heathrow flights
Halifax to Luton flights
Winnipeg to London City flights
St. John's to Gatwick flights
Toronto Island to Edinburgh flights
Kelowna 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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 217AverageC$ 580FlexibilityNo cancel feeOn-time60%
Search WestJet flights
LufthansaCheapestC$ 424AverageC$ 966FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
TAP AIR PORTUGALCheapestC$ 431AverageC$ 807FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
WestJet EncoreCheapestC$ 546AverageC$ 696FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 572AverageC$ 883FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 596AverageC$ 903FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 634AverageC$ 782FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapestC$ 702AverageC$ 1,051FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Aer LingusCheapestC$ 706AverageC$ 861FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapestC$ 709AverageC$ 865FlexibilityNo cancel feeOn-time70%
Search British Airways 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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