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Cheap flights from Ontario to London from £198

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
7 Sep — 14 Sep1
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 August 2026.

Thu 17/922:05 -
Nonstop6h 45m
Wed 23/909:40 -
1 stop14h 40m
Deal found 7/8£389
Sat 21/1118:30 -
1 stop23h 40m
Sat 28/1109:25 -
1 stop32h 05m
Deal found 4/8£392
Wed 19/818:30 -
1 stop12h 25m
Fri 21/811:05 -
1 stop28h 55m
Deal found 7/8£393
Thu 24/922:05 -
Nonstop6h 45m
Fri 2/1011:35 -
Nonstop7h 40m
Deal found 5/8£394
Sat 12/917:00 -
1 stop12h 45m
Mon 21/909:40 -
1 stop14h 50m
Deal found 7/8£398
Tue 8/916:55 -
1 stop10h 00m
Tue 15/909:40 -
1 stop14h 15m
Deal found 5/8£401
Wed 16/921:55 -
1 stop19h 20m
Tue 13/1012:05 -
2 stops30h 55m
Deal found 4/8£401
Tue 22/920:45 -
1 stop10h 10m
Fri 2/1013:05 -
1 stop14h 00m
Deal found 7/8£401
Thu 8/1020:35 -
1 stop9h 10m
Sun 18/1011:35 -
Nonstop7h 40m
Deal found 5/8£401
Mon 21/919:50 -
Nonstop7h 05m
Mon 28/911:35 -
1 stop11h 05m
Deal found 3/8£401
Sat 19/921:35 -
1 stop10h 20m
Wed 30/922:00 -
2 stops24h 10m
Deal found 7/8£401
Sat 5/923:55 -
1 stop17h 00m
Sat 12/909:00 -
1 stop11h 50m
Deal found 6/8£402

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 August 2026.

Round-trip from

£389

One-way from

£198

Popular in

December

Cheapest in

February

Average price

£620

Good round-trip deal

£411 or less

Good one-way deal

£231 or less
Air Transat
  • Air Transat
  • 17/9-23/9
  • 1 total stop
  • 21h 25m total
  • Ontario to London
Search Deals
WestJet
  • WestJet
  • 5/10
  • 1 total stop
  • 12h 10m total
  • Ontario to London
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Price to beat on a round-trip flight from Ontario to London (LON).
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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 August 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

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 7/9

20:55-07:55

1 stop30h 00m

London Gatwick

Tue 15/9

09:40-16:30

1 stop11h 50m

£410

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 14/9

23:40-23:55

1 stop19h 15m

London Gatwick

Mon 21/9

06:00-16:05

1 stop15h 05m

£411

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Sun 13/9

14:30-07:55

1 stop12h 25m

London Gatwick

Sun 27/9

09:40-16:30

1 stop11h 50m

£411

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 21/9

20:45-07:55

1 stop30h 10m

London Gatwick

Mon 28/9

11:35-10:21

1 stop27h 46m

£413

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Thu 19/11

18:45-14:05

1 stop14h 20m

London Luton

Wed 25/11

15:10-12:35

1 stop26h 25m

£419

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Sun 6/9

16:55-07:55

1 stop10h 00m

London Gatwick

Tue 15/9

09:40-16:30

1 stop11h 50m

£420

TorontoLondon

YYZ Toronto Pearson Intl - LHR London Heathrow

YYZLHR

Toronto Pearson Intl

Mon 28/9

20:45-11:55

1 stop10h 10m

London Heathrow

Thu 15/10

21:25-19:10

1 stop26h 45m

£444

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Wed 9/9

16:55-09:50

1 stop11h 55m

London Gatwick

Mon 14/9

11:35-20:11

1 stop13h 36m

£449

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Wed 19/8

15:40-09:50

1 stop13h 10m

London Gatwick

Mon 24/8

11:35-18:28

1 stop11h 53m

£456

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Mon 7/9

23:45-21:45

1 stop17h 00m

London Luton

Mon 14/9

18:55-17:10

1 stop27h 15m

£459

Flights are sorted by cheapest return flights first.

Deals found on 3/8

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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of £433). Flying from Region of Ontario to London in December is currently the most expensive (average of £675). 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 August 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 August 2026.

The most flights from CAON to LON are scheduled on a Thursday (50 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (37 on average).

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

Airfare is below average for this route at the moment.
Region of Ontario to London flights typically cost between £521 and £723 in September.
The cheapest return price found within the last 5 days was £401 on Icelandair (22 Sept–2 Oct).

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 86 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 £389. 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?

    £37 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on TAP AIR PORTUGAL and Air Transat, with prices starting from £168 and £205, 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 SAUDIA (100%), KLM (90%) and Air France (90%).

  • 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 £1,200, our data indicates the cheapest price to be £295. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £384.

  • 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, February is the cheapest month in which you can book a flight from Region of Ontario to London (average of £433). Flying from Region of Ontario to London in December is currently the most expensive (average of £675). 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?

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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 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£308Average£635FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£359Average£628FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£378Average£494FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air TransatCheapest£387Average£513FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Virgin AtlanticCheapest£387Average£612FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£407Average£639FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£414Average£689FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
FinnairCheapest£418Average£509FlexibilityNo cancel feeOn-time76%
Search Finnair flights
LufthansaCheapest£419Average£577FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£470Average£571FlexibilityNo 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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