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

A quick flight from Region of Ontario to London can take about 10h. Air Transat provides one of the quickest options available for as low as £412. The distance between Region of Ontario and London is about 3557 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 £167 and £204, respectively.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 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 £1,206, our data indicates the cheapest price to be £301. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £354.

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 (87%), KLM (85%) and Air France (85%).

What are the most popular airlines that fly from Region of Ontario to London?

When booking a flight from Region of Ontario to London, you may want to consider flying on Air Canada, Air Transat or British Airways as they are the most popular for this route.

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.

£203+ Cheap Flights from Ontario to London

Cheap flight deals from Ontario to London

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 18 August 2026.

Wed 14/1023:40 -

1 stop28h 20m

Fri 16/1012:40 -

1 stop12h 50m

Deal found 13/8£393

Wed 16/917:00 -

1 stop12h 45m

Wed 7/1011:35 -

Nonstop7h 40m

Deal found 13/8£394

Wed 30/917:00 -

1 stop12h 45m

Wed 7/1011:35 -

Nonstop7h 40m

Deal found 16/8£397

Mon 14/923:40 -

1 stop19h 15m

Tue 22/906:00 -

1 stop15h 05m

Deal found 13/8£398

Sun 11/1022:15 -

1 stop17h 45m

Sat 17/1008:05 -

1 stop11h 05m

Deal found 17/8£398

Sun 13/916:55 -

1 stop10h 00m

Fri 25/909:40 -

1 stop11h 50m

Deal found 17/8£399

Wed 7/1022:45 -

2 stops16h 10m

Wed 14/1007:25 -

2 stops18h 20m

Deal found 13/8£399

Tue 15/922:15 -

1 stop19h 30m

Wed 23/911:35 -

1 stop15h 25m

Deal found 17/8£400

Thu 17/923:55 -

1 stop18h 25m

Thu 24/906:00 -

2 stops20h 45m

Deal found 17/8£400

Wed 7/1017:35 -

2 stops20h 25m

Wed 21/1008:00 -

2 stops35h 00m

Deal found 16/8£401

Thu 8/1017:55 -

1 stop33h 25m

Sun 11/1006:00 -

1 stop15h 10m

Deal found 15/8£401

Wed 23/923:55 -

1 stop12h 10m

Wed 7/1012:40 -

Nonstop8h 00m

Deal found 15/8£401

Best flights from Ontario to London
Discover carefully curated flight deals from Ontario to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Sun 13/916:55 -

1 stop10h 00m

Fri 18/909:40 -

1 stop11h 50m

Deal found 15/8£412

Wed 18/1118:45 -

1 stop22h 45m

Wed 25/1115:10 -

1 stop26h 25m

Deal found 17/8£415

Tue 29/910:00 -

1 stop18h 50m

Wed 21/1011:35 -

1 stop13h 36m

Deal found 13/8£416

Mon 12/1023:10 -

1 stop10h 30m

Wed 21/1015:40 -

1 stop32h 30m

Deal found 16/8£416

Sun 18/1018:00 -

1 stop11h 00m

Sun 25/1007:40 -

1 stop12h 15m

Deal found 13/8£468

Mon 12/1022:55 -

Nonstop7h 15m

Fri 11/1206:30 -

1 stop17h 45m

Deal found 17/8£471

Sat 28/1121:00 -

Nonstop7h 05m

Sat 12/1208:55 -

1 stop12h 15m

Deal found 14/8£474

Sun 6/908:30 -

2 stops16h 25m

Sun 13/906:50 -

2 stops15h 33m

Deal found 13/8£506

Sun 18/1017:30 -

2 stops45h 55m

Wed 21/1016:25 -

1 stop26h 35m

Deal found 17/8£525

Mon 5/1016:45 -

1 stop10h 10m

Thu 10/1210:00 -

1 stop10h 40m

Deal found 14/8£532

Thu 8/1022:00 -

Nonstop6h 40m

Tue 13/1018:05 -

Nonstop7h 10m

Deal found 13/8£538

Thu 10/916:35 -

2 stops13h 45m

Tue 15/920:05 -

1 stop23h 55m

Deal found 15/8£546

Tue 17/1121:35 -

Nonstop7h 10m

Fri 27/1111:40 -

Nonstop8h 20m

Deal found 16/8£417

Mon 1/220:15 -

1 stop32h 40m

Thu 25/210:55 -

1 stop36h 25m

Deal found 15/8£836

Sat 24/1019:50 -

1 stop22h 55m

Sat 31/1007:30 -

1 stop33h 40m

Deal found 13/8£432

Fri 20/1121:35 -

Nonstop7h 10m

Sun 22/1111:40 -

Nonstop8h 20m

Deal found 17/8£419

Mon 12/1022:45 -

Nonstop7h 00m

Fri 23/1011:35 -

1 stop11h 53m

Deal found 16/8£464

Mon 16/1120:30 -

Nonstop7h 05m

Sat 28/1108:40 -

1 stop12h 00m

Deal found 16/8£476

Tue 3/1118:05 -

Nonstop7h 25m

Thu 19/1118:00 -

Nonstop8h 05m

Deal found 15/8£477

Sun 27/918:50 -

1 stop21h 30m

Wed 7/1016:10 -

1 stop24h 25m

Deal found 17/8£438

Tue 22/909:45 -

2 stops15h 10m

Sun 27/906:50 -

2 stops14h 20m

Deal found 13/8£506

Mon 7/920:55 -

1 stop30h 00m

Sun 20/909:40 -

1 stop11h 50m

Deal found 16/8£423

Thu 15/1022:10 -

Nonstop6h 50m

Thu 22/1014:05 -

Nonstop7h 35m

Deal found 14/8£477

Sun 20/914:55 -

1 stop14h 50m

Wed 23/909:40 -

1 stop19h 57m

Deal found 17/8£479

Thu 8/1022:55 -

Nonstop7h 15m

Sat 12/1213:05 -

Nonstop7h 55m

Deal found 14/8£480

Tue 29/918:00 -

1 stop10h 25m

Tue 6/1010:35 -

2 stops17h 21m

Deal found 15/8£533

Wed 9/923:40 -

1 stop11h 45m

Fri 11/911:35 -

Nonstop7h 40m

Deal found 15/8£446

Mon 12/1022:45 -

2 stops31h 35m

Wed 28/1009:35 -

2 stops15h 20m

Deal found 17/8£545

Thu 24/919:43 -

2 stops15h 17m

Sat 24/1017:00 -

2 stops35h 25m

Deal found 17/8£556

Sun 22/1115:15 -

1 stop10h 25m

Thu 3/1212:05 -

1 stop11h 40m

Deal found 13/8£507

Find flight deals from Ontario to London

Round-trip from	£393
One-way from	£203
Popular in	December
Cheapest in	February
Average price	£616
Good round-trip deal	£187 or less
Good one-way deal	£215 or less

Air Transat
14/10-16/10
2 total stops
41h 10m total
Ontario to London

Search Deals

Air Transat
15/9
1 total stop
18h 36m total
Ontario to London

Search Deals

High demand for flights, 0% potential price rise

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 August 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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Sun 13/9

16:55-07:55

1 stop10h 00m

London Gatwick

Fri 18/9

09:40-16:30

1 stop11h 50m

£412

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Wed 18/11

18:45-22:30

1 stop22h 45m

London Luton

Wed 25/11

15:10-12:35

1 stop26h 25m

£415

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Tue 29/9

10:00-09:50

1 stop18h 50m

London Gatwick

Wed 21/10

11:35-20:11

1 stop13h 36m

£416

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Mon 12/10

23:10-14:40

1 stop10h 30m

London Gatwick

Wed 21/10

15:40-19:10

1 stop32h 30m

£416

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Tue 17/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Fri 27/11

11:40-15:00

Nonstop8h 20m

£417

TorontoLondon

YYZ Toronto Pearson Intl - LGW London Gatwick

YYZLGW

Toronto Pearson Intl

Fri 20/11

21:35-09:45

Nonstop7h 10m

London Gatwick

Sun 22/11

11:40-15:00

Nonstop8h 20m

£419

TorontoLondon

YTZ Toronto Island - LGW London Gatwick

YTZLGW

Toronto Island

Mon 7/9

20:55-07:55

1 stop30h 00m

London Gatwick

Sun 20/9

09:40-16:30

1 stop11h 50m

£423

TorontoLondon

YYZ Toronto Pearson Intl - LTN London Luton

YYZLTN

Toronto Pearson Intl

Sat 24/10

19:50-23:45

1 stop22h 55m

London Luton

Sat 31/10

07:30-13:10

1 stop33h 40m

£432

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Sun 27/9

18:50-21:20

1 stop21h 30m

London Gatwick

Wed 7/10

16:10-11:35

1 stop24h 25m

£438

MontrealLondon

YUL Montreal Pierre Elliott Trudeau Intl - LGW London Gatwick

YULLGW

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

23:40-16:25

1 stop11h 45m

London Gatwick

Fri 11/9

11:35-14:15

Nonstop7h 40m

£446

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

YUL-LGW

YYZ-LGW

YTZ-LGW

YYZ-LHR

YTZ-LHR

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

CAON-LON

YUL-LGW

YYZ-LGW

YTZ-LGW

YYZ-LHR

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 £431). Flying from Region of Ontario to London in December is currently the most expensive (average of £677). 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 Monday (50 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (32 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 £516 and £713 in October.
The cheapest return price found within the last 5 days was £398 on Multiple Airlines (11 Oct–17 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

How long is the flight from Region of Ontario to London?
A quick flight from Region of Ontario to London can take about 10h. Air Transat provides one of the quickest options available for as low as £412. The distance between Region of Ontario and London is about 3557 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 £167 and £204, 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 SAUDIA (87%), KLM (85%) and Air France (85%).
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 £1,206, our data indicates the cheapest price to be £301. The most popular route (Toronto Pearson Intl - London Heathrow), is priced around £354.
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 £431). Flying from Region of Ontario to London in December is currently the most expensive (average of £677). 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

Hounslow

Milton Keynes

Luton

Wembley

Gatwick

Slough

Ilford

Hayes

Croydon

Colchester

Eastbourne

Brentford

Southend-on-Sea

Barnet

Enfield

Kingston upon Thames

Southall

Watford

Dover

Romford

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Alternative routes for Ontario to London

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Québec City to Heathrow flights

Top 10 airlines flying from Ontario to London

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£306	Average£631	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Icelandair	Cheapest£357	Average£615	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
KLM	Cheapest£375	Average£491	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Transat	Cheapest£380	Average£527	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Virgin Atlantic	Cheapest£385	Average£592	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Air Canada	Cheapest£412	Average£683	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
British Airways	Cheapest£412	Average£637	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£416	Average£506	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Lufthansa	Cheapest£417	Average£585	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£467	Average£568	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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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!

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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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Cheap flights from Ontario to London from £203

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ontario to London

Cheapest flights from Ontario to LondonExplore 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 18 August 2026.

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 18 August 2026.

Best flights from Ontario to LondonDiscover carefully curated flight deals from Ontario to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Discover carefully curated flight deals from Ontario to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Direct flights from Ontario to LondonExplore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Explore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Last-minute flights from Ontario to LondonDiscover last-minute flight deals from Ontario to London. Data last updated 18 August 2026 and is based on user searches.

Discover last-minute flight deals from Ontario to London. Data last updated 18 August 2026 and is based on user searches.

One-way flights from Ontario to LondonSearch for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

Search for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

Find flight deals from Ontario to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

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.

Cheapflights Insights

What is the cheapest month to book a flight from Region of Ontario to London?

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 18 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 18 August 2026.

The most flights from CAON to LON are scheduled on a Monday (50 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (32 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 £516 and £713 in October.The cheapest return price found within the last 5 days was £398 on Multiple Airlines (11 Oct–17 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

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

What are the cheapest airlines to fly from Region of Ontario to London one-way?

What are the most popular routes from Region of Ontario to London?

What are the most reliable airlines from Region of Ontario to London?

What are the cheapest flights from Region of Ontario to London?

Can I find deals for flights from Ontario to London that include hotel bookings?

How can I find direct flights from Ontario to London?

Can I find deals for business class flights from Ontario to London?

What is the cheapest month to book a flight from Region of Ontario to London?

Travelling to a place near London?

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Alternative routes for Ontario to London

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Complete your trip

Complete your trip to London by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

Book a non-stop flight to one of these other cities located in England.

Search flights from Ontario to London by cabin class

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Other flights to London

Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 August 2026.

Ontario and London flights

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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 18 August 2026.

Best flights from Ontario to London
Discover carefully curated flight deals from Ontario to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 August 2026.

Direct flights from Ontario to London
Explore direct flight options from Ontario to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 18 August 2026.

Last-minute flights from Ontario to London
Discover last-minute flight deals from Ontario to London. Data last updated 18 August 2026 and is based on user searches.

One-way flights from Ontario to London
Search for one-way flight options from Ontario to London. Find affordable one-way fares based on user searches. Data last updated 18 August 2026.

Region of Ontario to London flights typically cost between £516 and £713 in October.
The cheapest return price found within the last 5 days was £398 on Multiple Airlines (11 Oct–17 Oct).