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Cheap flights from Ontario to London from £200

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 31/8. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
23 Jul — 30 Jul1
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 23 June 2026.

Sun 13/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Thu 8/1012:40
LGW
-
YUL
1 stop12h 50m
Air Transat
Deal found 22/6£422
Sun 13/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Tue 13/1012:40
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 19/6£425
Sat 7/1118:30
YUL
-
LHR
1 stop33h 40m
Multiple Airlines
Sat 14/1120:50
LHR
-
YUL
1 stop20h 40m
Multiple Airlines
Deal found 21/6£425
Thu 8/1022:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Sat 24/1012:40
LGW
-
YUL
1 stop11h 52m
Air Transat
Deal found 20/6£425
Mon 6/717:00
YUL
-
LGW
1 stop12h 45m
Porter Airlines
Wed 15/709:40
LGW
-
YUL
1 stop19h 57m
Porter Airlines
Deal found 20/6£426
Fri 30/1014:15
YUL
-
LGW
1 stop15h 30m
Air Transat
Sun 8/1111:40
LGW
-
YUL
1 stop15h 40m
Air Transat
Deal found 21/6£427
Fri 4/918:50
YUL
-
LCY
1 stop9h 40m
Virgin Atlantic
Mon 14/909:20
LCY
-
YUL
1 stop12h 35m
Virgin Atlantic
Deal found 23/6£427
Sat 18/722:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Sun 9/811:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 20/6£428
Fri 10/722:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Mon 7/911:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Deal found 21/6£428
Tue 15/922:00
YUL
-
LHR
Nonstop6h 40m
British Airways
Wed 20/116:45
LHR
-
YUL
Nonstop7h 30m
British Airways
Deal found 23/6£428
Fri 30/1017:25
YUL
-
LGW
1 stop12h 20m
Air Transat
Tue 17/1111:40
LGW
-
YUL
1 stop15h 40m
Air Transat
Deal found 20/6£429
Thu 8/1022:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Thu 22/1012:40
LGW
-
YUL
1 stop11h 40m
Air Transat
Deal found 20/6£430

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 23 June 2026.

Round-trip from

£422

One-way from

£200

Popular in

July

Cheapest in

February

Average price

£566

Good round-trip deal

£459 or less

Good one-way deal

£224 or less
Air Transat
  • Air Transat
  • 13/9-8/10
  • 1 total stop
  • 19h 35m total
  • Ontario to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 31/8
  • Nonstop
  • 7h 15m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£73 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 23 June 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

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Fri 2/10

17:00-10:45

1 stop12h 45m

London Gatwick

Mon 12/10

09:40-00:37

1 stop19h 57m

£428

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 1/9

19:15-18:30

1 stop18h 15m

London Luton

Wed 16/9

19:50-11:00

1 stop20h 10m

£433

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Tue 1/9

19:15-18:30

1 stop18h 15m

London Luton

Mon 14/9

12:35-11:00

1 stop27h 25m

£434

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Mon 6/7

19:15-20:55

1 stop20h 40m

London Luton

Mon 13/7

19:25-11:00

1 stop20h 35m

£441

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Tue 20/10

15:10-10:45

1 stop14h 35m

London Gatwick

Fri 23/10

11:35-14:15

Nonstop7h 40m

£441

TorontoLondon

YYZ - LTN

YYZLTN

Toronto Pearson Intl

Fri 21/8

19:15-11:15

1 stop11h 00m

London Luton

Wed 2/9

19:50-11:00

1 stop20h 10m

£441

MontrealLondon

YUL - LGW

YULLGW

Montreal Pierre Elliott Trudeau Intl

Wed 19/8

17:00-07:55

1 stop9h 55m

London Gatwick

Mon 14/9

11:35-14:15

Nonstop7h 40m

£449

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 1/10

22:55-11:10

Nonstop7h 15m

London Heathrow

Mon 12/10

17:50-20:40

Nonstop7h 50m

£475

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Sun 22/11

20:10-08:30

Nonstop7h 20m

London Heathrow

Fri 27/11

18:00-21:05

Nonstop8h 05m

£478

TorontoLondon

YTZ - LGW

YTZLGW

Toronto Island

Sun 26/7

16:55-07:55

1 stop10h 00m

London Gatwick

Tue 28/7

09:40-16:33

1 stop11h 53m

£479

Flights are sorted by cheapest return flights first.

Deals found on 19/6

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 £441). Flying from Region of Ontario to London in December is currently the most expensive (average of £703). 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 23 June 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 23 June 2026.

The most flights from CAON to LON are scheduled on a Monday (57 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (34 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 76 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 7h 15m. Porter Airlines provides one of the quickest options available for as low as £475. 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?

    £162 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 £167 and £172, 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 (88%), Air France (88%) and Delta (88%).

  • 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 £1,186, our data indicates the cheapest price to be £290. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £405.

  • 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 £441). Flying from Region of Ontario to London in December is currently the most expensive (average of £703). 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
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Kingston upon Thames
Eastbourne
Watford
Southall
Romford
Ipswich
Borehamwood
Folkestone
Southend-on-Sea

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 23 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£314Average£625FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£365Average£630FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£384Average£538FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
KLMCheapest£384Average£503FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£394Average£644FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£411Average£569FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£412Average£562FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£423Average£700FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£464Average£558FlexibilityNo cancel feeOn-time76%
Search Finnair flights
United AirlinesCheapest£478Average£581FlexibilityNo 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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