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Cheap flights from Ontario to London from £206

YYZ — LON
4 Oct — 11 Oct1
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

Thu 22/1017:35 -
1 stop14h 10m
Sun 8/1108:15 -
1 stop18h 00m
Deal found 2/9£415
Tue 22/922:45 -
Nonstop7h 00m
Sat 26/909:40 -
Nonstop8h 05m
Deal found 2/9£415
Sun 8/1119:40 -
1 stop10h 10m
Thu 19/1112:15 -
1 stop11h 00m
Deal found 2/9£416
Mon 21/922:45 -
Nonstop7h 00m
Tue 29/912:40 -
Nonstop8h 00m
Deal found 2/9£416
Thu 8/1021:35 -
1 stop20h 45m
Wed 9/1212:15 -
1 stop29h 20m
Deal found 2/9£416
Sun 8/1119:40 -
1 stop10h 10m
Thu 26/1112:15 -
1 stop11h 00m
Deal found 2/9£417
Mon 5/1023:15 -
1 stop29h 35m
Sat 12/1211:40 -
Nonstop8h 20m
Deal found 3/9£417
Wed 11/1118:45 -
1 stop18h 15m
Wed 18/1120:55 -
1 stop20h 40m
Deal found 3/9£417
Sun 8/1119:40 -
1 stop10h 10m
Sun 22/1120:35 -
1 stop26h 40m
Deal found 2/9£417
Thu 24/919:10 -
1 stop9h 40m
Sat 3/1009:40 -
Nonstop8h 05m
Deal found 31/8£417
Sun 18/1020:05 -
1 stop30h 50m
Wed 21/1007:45 -
1 stop15h 25m
Deal found 31/8£418
Tue 6/1015:40 -
1 stop13h 10m
Thu 10/1211:40 -
Nonstop8h 20m
Deal found 2/9£418

Find flight deals from Ontario to London

Round-trip from

£415

One-way from

£206

Popular in

December

Cheapest in

January

Average price

£474

Good round-trip deal

£188 or less

Good one-way deal

£212 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 2/12-5/12
  • 2 total stops
  • 32h 35m total
  • Ontario to London
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6/11-31/12
  • 6/11-31/12
  • 1 total stop
  • 22h 40m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£2 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in September 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).
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Cheapflights Fare Finder

 
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
Fastest return journey

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Thu 10/9

22:05-09:50

Nonstop6h 45m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£207

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Thu 17/9

22:05-09:50

Nonstop6h 45m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£208

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

16:15-10:45

1 stop13h 30m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£209

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Thu 1/10

16:15-07:55

1 stop10h 40m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£210

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

06:45-10:45

1 stop23h 00m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£210

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - STN London Stansted

YULSTN

Montreal Pierre Elliott Trudeau Intl

Mon 5/10

19:00-14:05

2 stops38h 05m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£212

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Wed 23/9

14:55-10:45

1 stop14h 50m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£214

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - STN London Stansted

YULSTN

Montreal Pierre Elliott Trudeau Intl

Tue 13/10

19:00-23:50

2 stops47h 50m

London Stansted

Wed 31/12

00:00-18:00

Nonstop0h 00m

£215

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Mon 19/10

19:00-23:30

1 stop23h 30m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£215

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

22:05-09:50

Nonstop6h 45m

London Gatwick

Wed 31/12

00:00-18:00

Nonstop0h 00m

£215

Flights are sorted by cheapest return flights first.

Deals found on 3/9

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

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 £687). 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?

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

The most flights from CAON to LON are scheduled on a Wednesday (44 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (26 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 £435 and £555 in October.
The cheapest return price found within the last 5 days was £415 on TAP AIR PORTUGAL (22 Oct–8 Nov).

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 50 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

  • How long is the flight from Region of Ontario to London?

    A quick flight from Region of Ontario to London can take about 7h 20m. Air Transat provides one of the quickest options available for as low as £477. 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?

    £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 £207, 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 KLM (81%), Air France (81%) and Delta (81%).

  • 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 £1,664, our data indicates the cheapest price to be £302. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £345.

  • 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 £687). 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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Enfield
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Watford
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Ipswich

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Top 8 airlines flying from Ontario to London

AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£307Average£633FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£358Average£626FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£377Average£493FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air TransatCheapest£381Average£513FlexibilityNo cancel feeOn-time50%
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Air CanadaCheapest£415Average£691FlexibilityNo cancel feeOn-time67%
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British AirwaysCheapest£419Average£637FlexibilityNo cancel feeOn-time70%
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Virgin AtlanticCheapest£420Average£613FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£421Average£587FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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