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Cheap flights from Ontario to London from £180

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 19/10. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — LON
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Ontario to London

Keep the following information in mind while searching for Ontario to London flight deals. Data was last updated 17 September 2025.

Round-trip from

£381

One-way from

£180

Popular in

December

Cheapest in

February

Average price

£454

Good round-trip deal

£459 or less

Good one-way deal

£271 or less
Icelandair
  • Icelandair
  • 16/10-22/10
  • 2 total stops
  • 58h 40m total
  • Ontario to London
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19/10
  • 19/10
  • 2 total stops
  • 28h 15m total
  • Ontario to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£14 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£11 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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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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Find flight deals from Ontario to London

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 17 September 2025.

Thu 16/1023:00YYZ - LHR
1 stop31h 55mIcelandair
Tue 21/1021:25LHR - YYZ
1 stop26h 45mIcelandair
Deal found 16/9£381
Mon 6/1018:00YYZ - LGW
1 stop10h 50mAir Transat
Sat 13/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 16/9£381
Mon 13/1023:00YYZ - LHR
1 stop16h 20mIcelandair
Tue 21/1021:25LHR - YYZ
1 stop29h 30mIcelandair
Deal found 16/9£382
Wed 15/1023:15YYZ - LGW
1 stop29h 35mAir Transat
Thu 23/1012:40LGW - YYZ
Nonstop8h 00mAir Transat
Deal found 16/9£382
Fri 17/1023:00YYZ - LHR
1 stop31h 55mIcelandair
Thu 23/1021:25LHR - YYZ
1 stop29h 30mIcelandair
Deal found 16/9£383
Wed 15/1022:10YYZ - LTN
1 stop12h 15mMultiple Airlines
Mon 15/1211:45LTN - YYZ
2 stops32h 35mMultiple Airlines
Deal found 16/9£383
Sun 19/1022:45YYZ - LGW
Nonstop7h 00mAir Transat
Mon 3/1111:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 16/9£383
Fri 14/1119:40YYZ - LGW
1 stop10h 15mIcelandair
Wed 26/1111:55LGW - YYZ
1 stop11h 20mIcelandair
Deal found 15/9£384
Wed 8/1023:00YYZ - LHR
1 stop31h 55mIcelandair
Wed 15/1021:25LHR - YYZ
1 stop29h 30mIcelandair
Deal found 16/9£385
Sat 22/1121:35YYZ - LGW
Nonstop7h 10mAir Transat
Wed 3/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 15/9£385
Thu 23/1023:00YYZ - LHR
1 stop31h 55mIcelandair
Thu 6/1112:15LHR - YYZ
1 stop11h 00mIcelandair
Deal found 15/9£386
Tue 30/922:45YYZ - LGW
Nonstop7h 00mAir Transat
Wed 3/1211:40LGW - YYZ
Nonstop8h 20mAir Transat
Deal found 14/9£386

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 17 September 2025.
Use the filters below to find and compare flights from Ontario to London that are best for you.

Fly from

Ontario

Fly to

London

Route

Depart

Return

Price

TorontoLondon

YYZ - LHR

YYZLHR

Toronto Pearson Intl

Thu 16/10

23:00-11:55

1 stop31h 55m

London Heathrow

Tue 21/10

21:25-19:10

1 stop26h 45m

£381

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Mon 29/9

18:00-10:50

2 stops11h 50m

London Stansted

Mon 6/10

22:00-15:24

2 stops22h 24m

£391

TorontoLondon

YYZ - STN

YYZSTN

Toronto Pearson Intl

Sun 9/11

17:25-11:05

1 stop12h 40m

London Stansted

Tue 18/11

06:30-15:55

1 stop14h 25m

£391

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Wed 3/12

21:35-09:45

Nonstop7h 10m

London Gatwick

Tue 16/12

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 11/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Mon 17/11

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 6/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Sun 16/11

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Tue 18/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Mon 1/12

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Thu 6/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Mon 17/11

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YYZ - LGW

YYZLGW

Toronto Pearson Intl

Mon 10/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Mon 17/11

11:40-15:00

Nonstop8h 20m

£392

TorontoLondon

YTZ - LHR

YTZLHR

Toronto Island

Wed 15/10

16:10-09:35

2 stops12h 25m

London Heathrow

Wed 5/11

09:00-21:35

2 stops17h 35m

£395

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 60 results
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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 £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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 17 September 2025.

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 17 September 2025.

The most flights from CAON to LON are scheduled on a Tuesday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 on average).

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. Icelandair provides one of the quickest options available for as low as £392. 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?

    £183 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 Canada, with prices starting from £190 and £214, 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 KLM (87%), Air France (87%) and Delta (87%).

  • 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 £598, our data indicates the cheapest price to be £218. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £292.

  • 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 £112). Flying from Region of Ontario to London in August is currently the most expensive (average of £164). 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
Croydon
Hounslow
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Gatwick
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Deal
Wembley
Ilford
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Hayes
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Bishop's Stortford
Romford

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Alternative routes for Ontario to London

See prices for flight routes from nearby airports that may be better suited for you.
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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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£334Average£474FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£360Average£448FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£360Average£471FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Porter AirlinesCheapest£365Average£471FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapest£371Average£781FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
KLMCheapest£376Average£508FlexibilityNo cancel feeOn-time75%
Search KLM flights
Virgin AtlanticCheapest£382Average£509FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£392Average£609FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
British AirwaysCheapest£396Average£520FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£409Average£450FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

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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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