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Cheap flights from Ontario to London from £196

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 25/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
7 Aug — 14 Aug1
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 8 July 2026.

Sat 17/1022:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Mon 26/1011:40
LGW
-
YUL
1 stop11h 35m
Air Transat
Deal found 7/7£397
Mon 7/922:45
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Wed 16/906:00
LHR
-
YUL
1 stop19h 45m
TAP AIR PORTUGAL
Deal found 7/7£397
Thu 8/1022:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Thu 15/1012:40
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 7/7£398
Sat 5/917:00
YUL
-
LGW
1 stop9h 55m
Air Transat
Sun 20/911:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 5/7£399
Thu 3/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Tue 8/912:40
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 7/7£400
Sat 3/1006:45
YUL
-
LGW
1 stop23h 00m
Air Transat
Sun 11/1012:40
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 4/7£401
Wed 23/922:45
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Tue 6/1018:45
LHR
-
YUL
1 stop31h 00m
TAP AIR PORTUGAL
Deal found 7/7£401
Wed 23/922:45
YUL
-
STN
2 stops17h 50m
Multiple Airlines
Tue 6/1018:20
STN
-
YUL
2 stops31h 25m
Multiple Airlines
Deal found 7/7£401
Sun 6/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Fri 18/912:40
LGW
-
YUL
1 stop11h 50m
Air Transat
Deal found 5/7£401
Tue 22/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Thu 1/1012:40
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 6/7£402
Fri 16/1020:35
YUL
-
LGW
1 stop9h 10m
Air Transat
Sat 24/1012:40
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 7/7£403
Thu 17/917:00
YUL
-
STN
2 stops25h 20m
Multiple Airlines
Wed 23/906:30
STN
-
YUL
2 stops23h 07m
Multiple Airlines
Deal found 4/7£404

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 8 July 2026.

Round-trip from

£397

One-way from

£196

Popular in

July

Cheapest in

February

Average price

£636

Good round-trip deal

£432 or less

Good one-way deal

£222 or less
Air Transat
  • Air Transat
  • 17/10-26/10
  • 1 total stop
  • 18h 20m total
  • Ontario to London
Search Deals
15/7
  • 15/7
  • 1 total stop
  • 22h 00m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£70 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 July 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 8 July 2026.
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Wed 30/9

23:15-09:50

1 stop29h 35m

London Gatwick

Tue 6/10

12:40-15:40

Nonstop8h 00m

£409

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Fri 4/9

23:15-09:50

1 stop29h 35m

London Gatwick

Fri 18/9

11:35-08:13

1 stop25h 38m

£410

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Wed 9/9

19:15-10:45

1 stop10h 30m

London Luton

Wed 16/9

19:50-11:00

1 stop20h 10m

£416

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 29/9

19:10-09:50

1 stop9h 40m

London Gatwick

Sat 3/10

09:40-12:45

Nonstop8h 05m

£419
Fastest return journey

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

22:05-09:50

Nonstop6h 45m

London Gatwick

Sun 13/9

11:35-14:15

Nonstop7h 40m

£422

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 19/9

16:55-09:50

1 stop11h 55m

London Gatwick

Wed 23/9

11:35-13:25

1 stop30h 50m

£434

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 12/9

10:30-09:50

1 stop18h 20m

London Gatwick

Mon 21/9

11:35-07:55

1 stop25h 20m

£437

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 12/9

10:30-09:50

1 stop18h 20m

London Gatwick

Wed 23/9

11:35-20:15

1 stop13h 40m

£437

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sat 22/8

19:15-10:20

1 stop10h 05m

London Luton

Mon 31/8

19:25-11:00

1 stop20h 35m

£438

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sat 29/8

16:55-11:20

1 stop13h 25m

London Gatwick

Tue 15/9

09:40-16:33

1 stop11h 53m

£441

Flights are sorted by cheapest return flights first.

Deals found on 3/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £437). Flying from Region of Ontario to London in December is currently the most expensive (average of £697). 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 8 July 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 8 July 2026.

The most flights from CAON to LON are scheduled on a Monday (53 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).

How much does it cost for a return flight from Region of Ontario to London?

How far ahead should I book a flight from Region of Ontario to London?

The best time to book flights from Region of Ontario to London is 85 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 6h 45m. Air Transat provides one of the quickest options available for as low as £422. The distance between Region of Ontario and London is about 3258 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?

    £161 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 WestJet and TAP AIR PORTUGAL, with prices starting from £165 and £170, 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 Stansted.

  • 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 (86%), Air France (86%) and Delta (86%).

  • 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 £1,315, our data indicates the cheapest price to be £197. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £359.

  • 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, January is the cheapest month in which you can book a flight from Region of Ontario to London (average of £437). Flying from Region of Ontario to London in December is currently the most expensive (average of £697). 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
Hounslow
Milton Keynes
Luton
Wembley
Gatwick
Slough
Croydon
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Eastbourne
Southall
Aylesbury
Romford
Borehamwood
Southend-on-Sea
Uxbridge

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 8 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£310Average£619FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£362Average£623FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£380Average£522FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
KLMCheapest£380Average£498FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£390Average£625FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£404Average£596FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£407Average£511FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£418Average£698FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£466Average£513FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£473Average£575FlexibilityNo cancel feeOn-time69%
Search United 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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