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Cheap flights from Ontario to London from C$ 335

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 30 October 2025.

Fri 14/117:35 p.m.YYZ - LTN
1 stop15h 40mMultiple Airlines
Sat 22/119:00 p.m.LTN - YYZ
1 stop19h 15mMultiple Airlines
Deal found 29/10C$ 733
Fri 14/117:35 p.m.YYZ - LGW
1 stop17h 55mMultiple Airlines
Sat 22/1110:30 p.m.LGW - YYZ
1 stop17h 45mMultiple Airlines
Deal found 29/10C$ 733
Mon 8/125:25 p.m.YYZ - LGW
1 stop10h 50mMultiple Airlines
Mon 15/129:00 a.m.LGW - YYZ
1 stop11h 55mMultiple Airlines
Deal found 30/10C$ 734
Wed 3/1210:45 p.m.YYZ - LHR
1 stop15h 10mTAP AIR PORTUGAL
Wed 10/126:00 a.m.LHR - YYZ
1 stop20h 15mTAP AIR PORTUGAL
Deal found 28/10C$ 736
Sun 9/115:25 p.m.YYZ - LGW
1 stop10h 00mMultiple Airlines
Sun 16/118:25 a.m.LGW - YYZ
1 stop12h 30mMultiple Airlines
Deal found 28/10C$ 736
Wed 12/115:15 p.m.YYZ - STN
2 stops24h 25mMultiple Airlines
Sat 22/116:00 p.m.STN - YYZ
2 stops25h 45mMultiple Airlines
Deal found 30/10C$ 736
Mon 1/1210:45 p.m.YYZ - LHR
1 stop13h 45mTAP AIR PORTUGAL
Fri 23/112:25 p.m.LHR - YYZ
1 stop13h 50mTAP AIR PORTUGAL
Deal found 28/10C$ 737
Fri 5/125:25 p.m.YYZ - STN
1 stop14h 55mMultiple Airlines
Sun 14/128:30 a.m.STN - YYZ
1 stop12h 25mMultiple Airlines
Deal found 28/10C$ 737
Mon 24/1110:45 p.m.YYZ - LHR
1 stop18h 55mTAP AIR PORTUGAL
Wed 10/126:00 a.m.LHR - YYZ
1 stop20h 15mTAP AIR PORTUGAL
Deal found 29/10C$ 739
Mon 1/1210:45 p.m.YYZ - LGW
1 stop12h 00mTAP AIR PORTUGAL
Tue 9/124:35 p.m.LGW - YYZ
1 stop33h 40mTAP AIR PORTUGAL
Deal found 29/10C$ 739
Sun 9/117:35 p.m.YYZ - LTN
1 stop11h 10mMultiple Airlines
Mon 24/116:00 a.m.LTN - YYZ
1 stop10h 15mMultiple Airlines
Deal found 29/10C$ 740
Tue 2/125:35 p.m.YYZ - LHR
1 stop18h 55mTAP AIR PORTUGAL
Wed 10/128:15 a.m.LHR - YYZ
1 stop18h 00mTAP AIR PORTUGAL
Deal found 30/10C$ 740

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 30 October 2025.

Round-trip from

C$ 733

One-way from

C$ 335

Popular in

December

Cheapest in

February

Average price

C$ 839

Good round-trip deal

C$ 760 or less

Good one-way deal

C$ 389 or less
14/11-22/11
  • 14/11-22/11
  • 2 total stops
  • 34h 55m total
  • Ontario to London
Search Deals
31/1
  • 31/1
  • 1 total stop
  • 34h 20m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 61 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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).
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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 30 October 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 9/11

7:35 p.m.-11:45 a.m.

1 stop11h 10m

London Luton

Mon 24/11

6:00 a.m.-11:15 a.m.

1 stop10h 15m

C$ 740

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Wed 14/1

5:25 p.m.-7:50 a.m.

1 stop9h 25m

London Stansted

Sun 18/1

8:30 a.m.-3:55 p.m.

1 stop12h 25m

C$ 740

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 23/11

5:15 p.m.-10:35 p.m.

2 stops24h 20m

London Stansted

Sat 29/11

6:00 p.m.-2:45 p.m.

2 stops25h 45m

C$ 746

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 12/11

5:15 p.m.-10:20 p.m.

2 stops24h 05m

London Luton

Sat 22/11

8:50 p.m.-2:45 p.m.

2 stops22h 55m

C$ 750

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Fri 9/1

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

Nonstop7h 10m

London Gatwick

Fri 16/1

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

Nonstop8h 20m

C$ 768

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 24/11

10:35 a.m.-9:45 a.m.

1 stop18h 10m

London Gatwick

Tue 9/12

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

1 stop11h 45m

C$ 771

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 7/12

9:45 p.m.-5:30 p.m.

1 stop14h 45m

London Heathrow

Sun 14/12

6:30 p.m.-8:15 p.m.

1 stop30h 45m

C$ 786

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Wed 19/11

2:30 p.m.-9:45 a.m.

1 stop14h 15m

London Gatwick

Mon 24/11

11:40 a.m.-10:20 p.m.

1 stop15h 40m

C$ 788

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 1/12

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

1 stop22h 00m

London Gatwick

Wed 3/12

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

1 stop11h 45m

C$ 789

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

10:15 a.m.-9:45 a.m.

1 stop18h 30m

London Gatwick

Tue 10/3

11:40 a.m.-4:55 p.m.

1 stop33h 15m

C$ 790

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

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$ 571). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 832). 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 30 October 2025.

It’s optimal to fly from Region of Ontario to London in the evening. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Region of Ontario to London?

Use this chart to determine the cheapest time to fly round-trip from Ontario to London. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Region of Ontario to London flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 7h 10m. Air Transat provides one of the quickest options available for as low as C$ 768. 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 TAP AIR PORTUGAL. According to our data, you can fly for as low as C$ 335. Users have also found prices from C$ 443 and C$ 511 on WestJet and Lufthansa, 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$ 2,159 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 508 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 670.

  • 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$ 571). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 832). 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
Hounslow
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Gatwick

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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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 222AverageC$ 591FlexibilityNo cancel feeOn-time60%
Search WestJet flights
LufthansaCheapestC$ 433AverageC$ 1,007FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
PLAYCheapestC$ 456AverageC$ 671FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
WestJet EncoreCheapestC$ 557AverageC$ 711FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 584AverageC$ 926FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 608AverageC$ 742FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 636AverageC$ 871FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 649AverageC$ 835FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapestC$ 716AverageC$ 1,060FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapestC$ 717AverageC$ 1,147FlexibilityNo cancel feeOn-time75%
Search KLM 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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