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Cheap flights from London to Ontario from £255

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
25 Mar — 1 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Ontario

Enter your travel dates to find the best prices.

Cheapest flights from London to Ontario
Explore the most affordable flight options available from London to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 February 2026.

Wed 4/320:35
LHR
-
YYZ
1 stop26h 40m
Icelandair
Wed 18/320:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 20/2£321
Sat 18/415:40
LGW
-
YYZ
1 stop11h 25m
Icelandair
Sat 25/420:45
YYZ
-
LGW
1 stop12h 55m
Icelandair
Deal found 19/2£321
Tue 3/320:35
LHR
-
YYZ
1 stop26h 40m
Icelandair
Tue 10/320:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 19/2£322
Wed 15/415:40
LGW
-
YYZ
1 stop11h 25m
Icelandair
Wed 6/523:10
YYZ
-
LGW
1 stop10h 30m
Icelandair
Deal found 21/2£322
Thu 16/421:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Tue 28/420:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Deal found 22/2£323
Tue 21/406:30
STN
-
YYZ
1 stop12h 45m
Multiple Airlines
Tue 28/418:15
YYZ
-
STN
2 stops18h 20m
Multiple Airlines
Deal found 20/2£323
Fri 17/415:40
LGW
-
YYZ
1 stop11h 25m
Icelandair
Sat 25/423:10
YYZ
-
LGW
1 stop10h 30m
Icelandair
Deal found 22/2£323
Fri 6/320:35
LHR
-
YYZ
1 stop26h 40m
Icelandair
Mon 9/320:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 19/2£323
Mon 13/422:45
STN
-
YYZ
1 stop20h 30m
Multiple Airlines
Sun 26/421:35
YYZ
-
STN
1 stop10h 20m
Multiple Airlines
Deal found 20/2£323
Fri 15/515:40
LGW
-
YYZ
1 stop11h 25m
Icelandair
Fri 22/520:45
YYZ
-
LGW
1 stop12h 55m
Icelandair
Deal found 20/2£323
Wed 11/320:35
LHR
-
YYZ
1 stop26h 40m
Icelandair
Wed 18/320:40
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 19/2£324
Tue 28/422:00
STN
-
YYZ
1 stop20h 20m
Multiple Airlines
Fri 12/622:15
YYZ
-
STN
1 stop13h 00m
Multiple Airlines
Deal found 19/2£324

Find flight deals from London to Ontario

Keep the following information in mind while searching for London to Ontario flight deals. Data was last updated 23 February 2026.

Round-trip from

£321

One-way from

£255

Popular in

December

Cheapest in

September

Average price

£377

Good round-trip deal

£372 or less

Good one-way deal

£295 or less
Icelandair
  • Icelandair
  • 18/4-25/4
  • 2 total stops
  • 24h 20m total
  • London to Ontario
Search Deals
Icelandair
  • Icelandair
  • 24/4
  • 1 total stop
  • 11h 05m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£19 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Ontario.
Search Deals
Price to beat on a one-way flight from London (LON) to Ontario.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Ontario 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 February 2026.
Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

London

Fly to

Ontario

Route

Depart

Return

Price

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Mon 27/4

15:40-22:05

1 stop11h 25m

Toronto Pearson Intl

Tue 19/5

23:10-14:40

1 stop10h 30m

£335

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Wed 29/4

06:15-13:20

1 stop12h 05m

Toronto Pearson Intl

Tue 16/6

21:35-13:25

1 stop10h 50m

£336

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Wed 29/4

06:15-13:20

1 stop12h 05m

Toronto Pearson Intl

Mon 15/6

21:35-12:45

1 stop10h 10m

£340

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Thu 30/4

06:30-13:20

1 stop11h 50m

Toronto Pearson Intl

Sun 14/6

07:35-22:20

2 stops33h 45m

£348

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Tue 7/4

09:40-19:10

2 stops14h 30m

Toronto Pearson Intl

Tue 21/4

20:45-15:30

2 stops13h 45m

£354

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 14/5

13:05-19:10

1 stop11h 05m

Toronto Pearson Intl

Wed 20/5

20:45-11:55

1 stop10h 10m

£362

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 14/5

13:00-19:10

1 stop11h 10m

Toronto Pearson Intl

Wed 27/5

20:45-11:45

1 stop10h 00m

£388

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 14/5

15:40-22:05

1 stop11h 25m

Toronto Pearson Intl

Sat 23/5

20:45-11:45

1 stop10h 00m

£388

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 27/4

19:30-15:40

1 stop25h 10m

Toronto Pearson Intl

Sun 10/5

17:10-16:25

2 stops18h 15m

£392

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 5/5

06:40-15:40

1 stop14h 00m

Toronto Pearson Intl

Sat 23/5

17:10-09:20

1 stop11h 10m

£398

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 60 results
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Best time to book a flight from London to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from London 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 London to Ontario

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

Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of £212). Flying from London to Region of Ontario in December is currently the most expensive (average of £366). 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 LON to ON?

Find hourly flight availability from London to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 February 2026.

When flying from London to Region of Ontario, 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 London to Region of Ontario

Explore weekly flight availability from London to Ontario. 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 February 2026.

The most flights from LON to CAON are scheduled on a Friday (43 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (30 on average).

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

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated 23 February 2026.
Read reviews from past customers who have flown with Air Transat, Virgin Atlantic, andAir Canada from London to Ontario. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Air Transat
7.7
Good
511 reviews
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Virgin Atlantic
7.5
Good
679 reviews
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Air Canada
7.1
Good
10,742 reviews
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
Lufthansa
6.8
Okay
7,808 reviews
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.
British Airways
6.7
Okay
7,761 reviews
Air Transat
7.7
Good
511 reviews
Check prices

Overall

7.7

Entertainment

7.0

Comfort

7.3

Crew

8.4

Food

6.8

Boarding

7.9

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

YOW - GCM

The flight was delayed for 3.5 hours. No compensation for a meal voucher. We were positioned at the back of the plane and the toilets were not working properly. It was a foul smell coming from the toilet.

Related info for your journey

Find useful and relevant information for your journey from London to Ontario. 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 London to Region of Ontario?

    Icelandair, Scandinavian Airlines, and Air Transat can get you from London to Region of Ontario in just under 8h. Your travel time can differ by up to 17h 10m. There are 3563 mi between London and Region of Ontario. This flight may include one or multiple stops.

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

    The cheapet airlines for a one-way flight from London to Region of Ontario are Icelandair (£146), KLM (£190), and Air Transat (£202).

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

    The most popular route from London to Region of Ontario is London Heathrow - Toronto Pearson Intl. You may also consider London Gatwick - Toronto Pearson Intl or London Heathrow - Toronto Island.

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

    The top 3 most reliable airlines when flying from London to Region of Ontario are KLM (91%), Air France (91%) and Delta (91%).

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

    The cheapest flight price from London to Region of Ontario is £295. On average you can expect to pay £1,262. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £311.

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

    Yes. In addition to deals on London to Ontario flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Ontario.

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

    Yes. Cheapflights offers flight deals from London to Ontario 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 London to Region of Ontario?

    Currently, January is the cheapest month in which you can book a flight from London to Region of Ontario (average of £212). Flying from London to Region of Ontario in December is currently the most expensive (average of £366). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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Heathrow to London flights
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Stansted to Ottawa flights
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Top 10 airlines flying from London to Ontario

Discover the top 10 airlines that operate flights from London to Ontario. 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 February 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£270Average£341FlexibilityNo cancel feeOn-time79%
Search SWISS flights
TAP AIR PORTUGALCheapest£278Average£524FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Scandinavian AirlinesCheapest£284Average£440FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£293Average£411FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air CanadaCheapest£303Average£534FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£305Average£497FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air TransatCheapest£307Average£432FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Aer LingusCheapest£313Average£503FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£320Average£479FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£333Average£442FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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 London to Ontario?

When you search for this flight from London to Ontario, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Ontario?

Millions of users choose and trust Cheapflights to book the best flight deals from London to Ontario for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from London to Ontario with no change fees?

Certainly. Search results for flights to Ontario from London shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from London to Ontario become cheaper?

Of course! You can now track prices for flights from London to Ontario 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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