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Cheap flights from Ontario to London from £210

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 22/5. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
24 Apr — 1 May1
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 25 March 2026.

Mon 8/621:35
YYZ
-
LGW
1 stop10h 05m
Multiple Airlines
Mon 15/621:30
LGW
-
YYZ
1 stop20h 50m
Multiple Airlines
Deal found 21/3£391
Sat 23/521:35
YYZ
-
STN
1 stop16h 45m
Multiple Airlines
Wed 3/622:45
STN
-
YYZ
2 stops28h 00m
Multiple Airlines
Deal found 23/3£391
Tue 19/518:15
YYZ
-
LHR
2 stops20h 00m
Multiple Airlines
Tue 9/608:15
LHR
-
YYZ
1 stop11h 40m
Multiple Airlines
Deal found 20/3£393
Wed 6/518:15
YYZ
-
STN
2 stops12h 20m
Multiple Airlines
Tue 19/508:30
STN
-
YYZ
1 stop11h 25m
Multiple Airlines
Deal found 21/3£393
Mon 11/521:35
YYZ
-
LTN
1 stop10h 10m
Multiple Airlines
Wed 20/506:15
LTN
-
YYZ
2 stops13h 45m
Multiple Airlines
Deal found 20/3£393
Mon 18/523:05
YYZ
-
STN
1 stop10h 35m
Multiple Airlines
Mon 15/622:00
STN
-
YYZ
2 stops24h 10m
Multiple Airlines
Deal found 21/3£393
Mon 11/521:35
YYZ
-
LHR
1 stop19h 05m
Multiple Airlines
Thu 14/506:20
LHR
-
YYZ
1 stop12h 00m
Multiple Airlines
Deal found 22/3£394
Mon 11/521:35
YYZ
-
LTN
1 stop10h 10m
Multiple Airlines
Thu 14/521:40
LTN
-
YYZ
1 stop20h 40m
Multiple Airlines
Deal found 22/3£394
Mon 11/521:35
YYZ
-
STN
1 stop18h 45m
Multiple Airlines
Mon 18/520:00
STN
-
YYZ
1 stop22h 20m
Multiple Airlines
Deal found 22/3£394
Mon 15/623:05
YYZ
-
LTN
1 stop11h 40m
Multiple Airlines
Fri 19/606:20
LTN
-
YYZ
1 stop12h 00m
Multiple Airlines
Deal found 23/3£395
Wed 15/420:45
YYZ
-
LGW
1 stop12h 55m
Icelandair
Wed 22/415:40
LGW
-
YYZ
1 stop11h 25m
Icelandair
Deal found 21/3£395
Mon 4/521:35
YYZ
-
STN
1 stop10h 15m
Multiple Airlines
Wed 20/522:45
STN
-
YYZ
1 stop19h 35m
Multiple Airlines
Deal found 23/3£395

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 25 March 2026.

Round-trip from

£391

One-way from

£210

Popular in

December

Cheapest in

May

Average price

£458

Good round-trip deal

£388 or less

Good one-way deal

£233 or less
8/6-15/6
  • 8/6-15/6
  • 2 total stops
  • 30h 55m total
  • Ontario to London
Search Deals
22/5
  • 22/5
  • 1 total stop
  • 13h 15m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£15 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 March 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 25 March 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

Sat 4/4

22:35-10:45

Nonstop7h 10m

London Gatwick

Wed 15/4

12:40-16:00

Nonstop8h 20m

£435

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Thu 21/5

16:15-07:55

1 stop10h 40m

London Gatwick

Wed 3/6

09:40-17:02

1 stop12h 22m

£437

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 4/5

20:35-10:45

1 stop9h 10m

London Gatwick

Thu 14/5

12:40-19:20

1 stop11h 40m

£437

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Tue 5/5

21:35-12:45

1 stop10h 10m

London Stansted

Tue 19/5

08:30-14:55

1 stop11h 25m

£449

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Sun 17/5

19:15-22:20

1 stop22h 05m

London Luton

Mon 1/6

14:05-11:00

1 stop25h 55m

£464

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 19/5

16:00-09:50

1 stop12h 50m

London Gatwick

Wed 27/5

11:35-20:15

1 stop13h 40m

£474

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Wed 15/4

12:30-06:30

1 stop13h 00m

London Heathrow

Sun 19/4

12:40-07:17

2 stops23h 37m

£478

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Wed 15/4

22:55-11:10

Nonstop7h 15m

London Heathrow

Wed 22/4

09:55-19:55

1 stop15h 00m

£479

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Tue 26/5

18:55-09:50

1 stop9h 55m

London Gatwick

Wed 3/6

11:35-20:15

1 stop13h 40m

£480

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Fri 10/4

22:55-11:10

Nonstop7h 15m

London Heathrow

Sun 19/4

17:45-20:35

Nonstop7h 50m

£482

Flights are sorted by cheapest return flights first.

Deals found on 20/3

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, May is the cheapest month in which you can book a flight from Region of Ontario to London (average of £337). Flying from Region of Ontario to London in July is currently the most expensive (average of £444). 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 25 March 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.

How much does it cost for a return flight 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 £435. 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?

    £160 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 £169 and £217, 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 (78%), Aer Lingus (78%) and Finnair (78%).

  • 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 £582, our data indicates the cheapest price to be £375. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £368.

  • 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, May is the cheapest month in which you can book a flight from Region of Ontario to London (average of £337). Flying from Region of Ontario to London in July is currently the most expensive (average of £444). 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
Wembley
Croydon
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Eastbourne
Guildford
Watford
Kingston upon Thames
Romford
Ipswich
Bedford
Chelmsford
Bishop's Stortford

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 25 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£310Average£522FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air TransatCheapest£341Average£472FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
IcelandairCheapest£361Average£534FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Porter AirlinesCheapest£372Average£533FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
KLMCheapest£380Average£541FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£390Average£636FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air CanadaCheapest£393Average£676FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£396Average£566FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£406Average£563FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
American AirlinesCheapest£417Average£420FlexibilityNo 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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