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Cheap flights from Ontario to London from £217

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 12/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
28 Jan — 4 Feb1
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 29 December 2025.

Tue 30/1217:00YYZ - LHR
1 stop22h 35mMultiple Airlines
Tue 20/109:00LHR - YYZ
1 stop12h 05mMultiple Airlines
Deal found 27/12£495
Tue 30/1217:00YYZ - LHR
1 stop22h 35mMultiple Airlines
Sat 17/107:40LHR - YYZ
1 stop12h 10mMultiple Airlines
Deal found 27/12£496
Tue 30/1219:15YYZ - LHR
1 stop20h 20mAir Canada
Sun 11/113:00LHR - YYZ
Nonstop8h 00mAir Canada
Deal found 28/12£508
Wed 31/1219:30YUL - LHR
Nonstop6h 40mMultiple Airlines
Sat 17/109:05LHR - YUL
1 stop33h 40mMultiple Airlines
Deal found 26/12£512
Wed 31/1219:30YUL - LHR
Nonstop6h 40mLufthansa
Sat 17/113:25LHR - YUL
Nonstop7h 45mLufthansa
Deal found 26/12£522
Mon 29/1212:10YYZ - LHR
2 stops51h 25mAir Canada
Sat 10/118:00LHR - YYZ
1 stop21h 51mAir Canada
Deal found 27/12£529
Tue 30/1214:00YYZ - LHR
2 stops13h 05mSWISS
Tue 20/109:00LHR - YYZ
2 stops14h 50mSWISS
Deal found 27/12£529
Sat 27/1218:45YYZ - LHR
1 stop30h 10mMultiple Airlines
Thu 15/107:40LHR - YYZ
1 stop12h 10mMultiple Airlines
Deal found 27/12£534
Tue 30/1212:05YYZ - LHR
2 stops13h 35mUnited Airlines
Sat 17/112:05LHR - YYZ
2 stops14h 28mUnited Airlines
Deal found 27/12£547
Wed 31/1216:40YYZ - LHR
1 stop12h 45mBritish Airways
Wed 7/117:00LHR - YYZ
1 stop27h 00mBritish Airways
Deal found 26/12£557
Wed 31/1219:30YUL - LHR
Nonstop6h 40mAir Canada
Thu 8/109:00LHR - YUL
2 stops16h 49mAir Canada
Deal found 28/12£575
Wed 31/1219:30YUL - LHR
Nonstop6h 40mMultiple Airlines
Thu 8/109:00LHR - YUL
1 stop32h 15mMultiple Airlines
Deal found 29/12£577

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 29 December 2025.

Round-trip from

£398

One-way from

£217

Popular in

December

Cheapest in

February

Average price

£630

Good round-trip deal

£467 or less

Good one-way deal

£263 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 18/1-2/2
  • 2 total stops
  • 36h 55m total
  • Ontario to London
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 12/1
  • 2 total stops
  • 17h 50m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£23 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£12 potential savings vs. average return 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

 
Customise 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 858,174 searches. Data last updated 29 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

Sat 21/3

20:40-10:50

1 stop10h 10m

London Heathrow

Sun 29/3

21:25-19:10

1 stop26h 45m

£401

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 27/2

19:40-19:30

1 stop18h 50m

London Heathrow

Sat 7/3

12:15-18:15

1 stop11h 00m

£401

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sun 25/1

19:40-16:45

2 stops16h 05m

London Luton

Sun 1/2

08:05-18:15

2 stops15h 10m

£402

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 15/2

21:15-09:35

Nonstop7h 20m

London Heathrow

Sat 7/3

08:40-15:40

1 stop12h 00m

£406

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 22/1

21:35-09:45

Nonstop7h 10m

London Gatwick

Sat 7/2

11:40-15:00

Nonstop8h 20m

£406

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 28/4

21:30-15:30

1 stop13h 00m

London Luton

Wed 6/5

06:15-13:20

1 stop12h 05m

£406

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 2/2

22:30-10:50

Nonstop7h 20m

London Heathrow

Wed 11/2

14:30-18:00

Nonstop8h 30m

£409

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 13/2

21:15-09:35

Nonstop7h 20m

London Heathrow

Fri 20/2

14:30-18:00

Nonstop8h 30m

£409

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Thu 12/2

19:35-09:50

1 stop9h 15m

London Stansted

Thu 19/2

16:30-16:15

2 stops28h 45m

£414

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Thu 12/2

19:35-13:20

1 stop12h 45m

London Stansted

Wed 18/2

21:45-19:45

2 stops27h 00m

£415

Flights are sorted by cheapest return flights first.

Deals found on 26/12

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 return 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 £303). Flying from Region of Ontario to London in July is currently the most expensive (average of £442). 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 29 December 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 29 December 2025.

The most flights from CAON to LON are scheduled on a Friday (42 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (31 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 £406. The distance between Region of Ontario and London is about 3563 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Region of Ontario to London one-way?

    £159 is the cheapest one-way deal found within the past few days, from Air Transat. You may also be able to find cheap deals on TAP AIR PORTUGAL and Air Canada, with prices starting from £168 and £220, respectively.

  • What are the most popular routes from Region of Ontario to London?

    The most popular route from Region of Ontario to London is Toronto Pearson Intl - London Heathrow. You may also consider Toronto Pearson Intl - London Gatwick or Montreal Pierre Elliott Trudeau Intl - London Heathrow.

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

    The top 3 most reliable airlines when flying from Region of Ontario to London are KLM (80%), Air France (80%) and Delta (80%).

  • What are the cheapest flights from Region of Ontario to London?

    Looking for the cheapest flight from Region of Ontario to London? While on average our users pay £1,069, our data indicates the cheapest price to be £260. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £367.

  • 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 holiday 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 £303). Flying from Region of Ontario to London in July is currently the most expensive (average of £442). 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
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Croydon
Slough
Hounslow
Luton
Gatwick
Wembley
Ilford
Brentford
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Hayes
Watford
Crawley
Bedford
Romford
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Eastbourne
Ipswich
Bishop's Stortford
Chelmsford

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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
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Pierre Elliott Trudeau Intl to Heathrow flights
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Edmonton to Gatwick flights
Calgary to Stansted flights
Winnipeg to Heathrow flights
Vancouver Intl to Luton flights
Vancouver Intl to Manchester flights
Winnipeg to Gatwick flights
Québec City to Gatwick flights
Victoria to Gatwick flights
Québec City to Heathrow flights
Calgary to Edinburgh 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 858,174 searches. Data last updated 29 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£337Average£466FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapest£358Average£464FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£363Average£518FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Porter AirlinesCheapest£369Average£476FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapest£377Average£789FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£379Average£450FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£387Average£598FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£398Average£594FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£400Average£532FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£414Average£434FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to London from Ontario today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Ontario to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ontario to London for you. Better yet — we are completely free to use.

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?

Of course! You can now track prices for flights from Ontario to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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