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Cheap flights from Ontario to London from £189

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 25/3. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
24 Mar — 31 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 22 February 2026.

Fri 22/522:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Fri 5/608:00
LHR
-
YUL
1 stop18h 10m
TAP AIR PORTUGAL
Deal found 18/2£363
Mon 8/622:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Thu 18/619:50
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 21/2£365
Mon 25/522:45
YUL
-
LGW
1 stop11h 50m
TAP AIR PORTUGAL
Wed 10/610:35
LGW
-
YUL
1 stop15h 10m
TAP AIR PORTUGAL
Deal found 21/2£366
Sun 31/522:45
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Sun 14/608:00
LHR
-
YUL
1 stop18h 10m
TAP AIR PORTUGAL
Deal found 20/2£366
Mon 25/522:45
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Wed 10/613:45
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 21/2£366
Fri 22/522:45
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Sun 21/619:50
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 19/2£367
Wed 22/422:45
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Wed 29/411:20
LHR
-
YUL
1 stop14h 25m
TAP AIR PORTUGAL
Deal found 18/2£368
Mon 25/522:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Mon 1/611:20
LHR
-
YUL
1 stop14h 50m
TAP AIR PORTUGAL
Deal found 21/2£369
Fri 5/622:45
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Wed 10/611:20
LHR
-
YUL
1 stop14h 25m
TAP AIR PORTUGAL
Deal found 18/2£369
Fri 5/622:45
YUL
-
LGW
1 stop11h 55m
TAP AIR PORTUGAL
Wed 10/610:35
LGW
-
YUL
1 stop15h 10m
TAP AIR PORTUGAL
Deal found 18/2£371
Mon 1/622:45
YUL
-
LGW
1 stop11h 50m
TAP AIR PORTUGAL
Wed 10/610:35
LGW
-
YUL
1 stop15h 10m
TAP AIR PORTUGAL
Deal found 18/2£372
Mon 1/622:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Wed 10/613:45
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 18/2£372

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 22 February 2026.

Round-trip from

£362

One-way from

£189

Popular in

December

Cheapest in

May

Average price

£403

Good round-trip deal

£391 or less

Good one-way deal

£236 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 15/6-22/6
  • 2 total stops
  • 27h 25m total
  • Ontario to London
Search Deals
25/3
  • 25/3
  • 1 total stop
  • 15h 55m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£18 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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

 
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 22 February 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

YTZ - LGW

YTZLGW

Toronto Island

Wed 13/5

20:55-09:50

1 stop31h 55m

London Gatwick

Sun 24/5

09:40-18:58

1 stop14h 18m

£385

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Mon 4/5

20:55-09:50

1 stop31h 55m

London Gatwick

Wed 20/5

11:35-20:20

1 stop13h 45m

£391

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 3/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Thu 7/5

12:40-15:40

Nonstop8h 00m

£391

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Sun 3/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Fri 15/5

12:40-15:40

Nonstop8h 00m

£393

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 18/5

22:45-10:45

Nonstop7h 00m

London Gatwick

Wed 27/5

11:35-18:38

1 stop12h 03m

£394

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 1/6

21:35-12:45

1 stop10h 10m

London Luton

Wed 10/6

06:15-17:15

2 stops16h 00m

£395

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Thu 9/4

20:45-23:25

2 stops21h 40m

London Luton

Sun 19/4

09:00-19:10

2 stops15h 10m

£402

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 29/4

07:35-15:25

2 stops26h 50m

London Luton

Thu 7/5

21:40-13:20

1 stop20h 40m

£403

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Tue 14/4

20:45-11:55

1 stop10h 10m

London Heathrow

Wed 29/4

21:25-22:05

1 stop29h 40m

£406

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Mon 6/4

23:10-11:55

1 stop31h 45m

London Heathrow

Sat 18/4

13:05-19:10

1 stop11h 05m

£406

Flights are sorted by cheapest return flights first.

Deals found on 21/2

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 £326). 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 22 February 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 22 February 2026.

The most flights from CAON to LON are scheduled on a Friday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 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 10h 10m. Air Transat provides one of the quickest options available for as low as £406. The distance between Region of Ontario and London is about 3543 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 Toronto Pearson Intl - London City.

  • 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 American Airlines (64%), Aer Lingus (64%) and Finnair (64%).

  • 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 £1,129, our data indicates the cheapest price to be £262. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £346.

  • 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 £326). 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
Milton Keynes
Luton
Croydon
Wembley
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Watford
Guildford
Kingston upon Thames
Eastbourne
Ipswich
Chelmsford
Bedford
Crawley
Romford

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 22 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£339Average£467FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapest£359Average£531FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£364Average£518FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Porter AirlinesCheapest£374Average£477FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
KLMCheapest£375Average£451FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air CanadaCheapest£383Average£680FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Virgin AtlanticCheapest£387Average£594FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£393Average£545FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£404Average£560FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£415Average£418FlexibilityNo 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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