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Cheap flights from Ontario to London from C$ 406

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 8/2. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
14 Jan — 21 Jan1
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 15 December 2025.

Fri 26/126:00 a.m.YYZ - LHR
1 stop20h 20mAmerican Airlines
Thu 8/15:00 p.m.LHR - YYZ
1 stop22h 14mAmerican Airlines
Deal found 14/12C$ 819
Tue 30/127:44 p.m.YYZ - LHR
1 stop29h 36mBritish Airways
Sat 10/13:35 p.m.LHR - YYZ
1 stop28h 25mBritish Airways
Deal found 14/12C$ 823
Fri 26/124:40 p.m.YYZ - LHR
1 stop12h 45mBritish Airways
Wed 18/25:05 p.m.LHR - YYZ
Nonstop8h 10mBritish Airways
Deal found 14/12C$ 844
Tue 30/127:44 p.m.YYZ - LHR
1 stop21h 26mBritish Airways
Sun 11/15:00 p.m.LHR - YYZ
1 stop27h 00mBritish Airways
Deal found 14/12C$ 867
Thu 25/1210:56 a.m.YYZ - LHR
2 stops17h 24mAmerican Airlines
Fri 9/15:00 p.m.LHR - YYZ
1 stop21h 49mAmerican Airlines
Deal found 14/12C$ 870
Fri 26/126:00 a.m.YYZ - LHR
1 stop20h 20mAmerican Airlines
Mon 16/210:15 a.m.LHR - YYZ
1 stop17h 40mAmerican Airlines
Deal found 14/12C$ 873
Sat 27/124:44 p.m.YYZ - LHR
1 stop14h 16mMultiple Airlines
Wed 18/25:05 p.m.LHR - YYZ
Nonstop8h 10mMultiple Airlines
Deal found 14/12C$ 894
Fri 26/126:00 a.m.YYZ - LHR
1 stop22h 15mAmerican Airlines
Fri 20/25:05 p.m.LHR - YYZ
Nonstop8h 10mAmerican Airlines
Deal found 14/12C$ 899
Wed 31/127:14 a.m.YYZ - LHR
1 stop9h 56mAmerican Airlines
Thu 5/25:05 p.m.LHR - YYZ
Nonstop8h 10mAmerican Airlines
Deal found 14/12C$ 902
Fri 26/124:40 p.m.YYZ - LHR
1 stop12h 45mBritish Airways
Thu 19/25:05 p.m.LHR - YYZ
Nonstop8h 10mBritish Airways
Deal found 14/12C$ 903
Wed 24/128:40 p.m.YUL - LHR
Nonstop6h 50mAmerican Airlines
Thu 8/14:10 p.m.LHR - YUL
Nonstop7h 35mAmerican Airlines
Deal found 13/12C$ 903
Tue 23/126:10 a.m.YYZ - LHR
1 stop19h 40mAmerican Airlines
Thu 8/15:00 p.m.LHR - YYZ
1 stop21h 49mAmerican Airlines
Deal found 14/12C$ 918

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 15 December 2025.

Round-trip from

C$ 772

One-way from

C$ 406

Popular in

December

Cheapest in

February

Average price

C$ 1,164

Good round-trip deal

C$ 788 or less

Good one-way deal

C$ 461 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 13/5-24/5
  • 3 total stops
  • 38h 25m total
  • Ontario to London
Search Deals
8/2
  • 8/2
  • 2 total stops
  • 28h 55m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 78 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 December 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).
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 15 December 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 - LHR

YYZLHR

Toronto Pearson Intl

Tue 21/4

8:45 p.m.-11:55 a.m.

1 stop10h 10m

London Heathrow

Thu 30/4

1:05 p.m.-7:10 p.m.

1 stop11h 05m

C$ 797

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 7/4

8:45 p.m.-2:40 p.m.

1 stop12h 55m

London Gatwick

Sun 19/4

3:40 p.m.-7:10 p.m.

1 stop32h 30m

C$ 799

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 5/4

8:45 p.m.-11:55 a.m.

1 stop10h 10m

London Heathrow

Mon 20/4

1:05 p.m.-7:10 p.m.

1 stop11h 05m

C$ 801

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 9/4

8:45 p.m.-11:55 a.m.

1 stop10h 10m

London Heathrow

Sat 18/4

1:05 p.m.-7:10 p.m.

1 stop11h 05m

C$ 801

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 2/2

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

Nonstop7h 10m

London Gatwick

Thu 5/2

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

Nonstop8h 20m

C$ 810

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Thu 5/2

6:50 p.m.-7:05 p.m.

1 stop19h 15m

London Stansted

Sat 7/3

8:25 p.m.-12:10 p.m.

1 stop20h 45m

C$ 811

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 8/4

11:20 p.m.-9:35 p.m.

2 stops17h 15m

London Luton

Fri 17/4

6:20 a.m.-7:10 p.m.

2 stops17h 50m

C$ 822

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 1/2

5:00 p.m.-10:30 a.m.

1 stop12h 30m

London Heathrow

Wed 25/2

10:00 a.m.-5:20 p.m.

1 stop12h 20m

C$ 836

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Fri 22/5

11:55 p.m.-5:25 p.m.

1 stop12h 30m

London Luton

Sat 6/6

9:00 a.m.-3:50 p.m.

1 stop11h 50m

C$ 837

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sat 17/1

7:55 p.m.-12:30 p.m.

1 stop11h 35m

London Gatwick

Sun 1/2

6:25 a.m.-11:50 a.m.

1 stop10h 25m

C$ 839

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/12

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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$ 563). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 822). 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 15 December 2025.

It’s optimal to fly from Region of Ontario to London in the evening. By choosing this option you can save up to 21% 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.

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 15 December 2025.

The most flights from CAON to LON are scheduled on a Friday (44 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (29 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. Icelandair provides one of the quickest options available for as low as C$ 810. 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$ 61. Users have also found prices from C$ 279 and C$ 308 on Scandinavian Airlines 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 Montreal Pierre Elliott Trudeau Intl - London Heathrow.

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

    Consider KLM (80%), Air France (80%) or Delta (80%) 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$ 2,189 for a flight from Region of Ontario to London. The cheapest flight overall is C$ 501 while the most popular route, (Toronto Pearson Intl - London Heathrow) is currently priced at C$ 690.

  • 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$ 563). Flying from Region of Ontario to London in July is currently the most expensive (average of C$ 822). 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
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Gatwick
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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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 15 December 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapestC$ 219AverageC$ 583FlexibilityNo cancel feeOn-time60%
Search WestJet flights
LufthansaCheapestC$ 427AverageC$ 967FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
PLAYCheapestC$ 465AverageC$ 713FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
WestJet EncoreCheapestC$ 550AverageC$ 701FlexibilityNo cancel feeOn-timeN/A
Search WestJet Encore flights
Air TransatCheapestC$ 576AverageC$ 912FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 600AverageC$ 779FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Porter AirlinesCheapestC$ 618AverageC$ 862FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
IcelandairCheapestC$ 639AverageC$ 807FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapestC$ 703AverageC$ 1,048FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Aer LingusCheapestC$ 712AverageC$ 881FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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