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Cheap flights from London to Ontario from £272

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 24/9. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
24 Jul — 31 Jul1
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 24 June 2026.

Thu 2/711:35
LGW
-
YTZ
1 stop15h 43m
Air Transat
Wed 8/720:55
YTZ
-
LGW
1 stop31h 55m
Air Transat
Deal found 22/6£419
Thu 2/713:00
LTN
-
YYZ
1 stop30h 55m
Multiple Airlines
Wed 8/722:10
YYZ
-
LTN
2 stops44h 15m
Multiple Airlines
Deal found 23/6£419
Tue 6/1008:45
LHR
-
YYZ
1 stop12h 25m
Air Canada
Fri 16/1018:35
YYZ
-
LHR
Nonstop7h 00m
Air Canada
Deal found 24/6£419
Wed 1/722:45
STN
-
YYZ
2 stops21h 15m
Multiple Airlines
Wed 22/721:55
YYZ
-
STN
2 stops18h 25m
Multiple Airlines
Deal found 22/6£419
Thu 2/709:40
LGW
-
YYZ
Nonstop8h 05m
Air Transat
Sun 5/723:15
YYZ
-
LGW
1 stop29h 35m
Air Transat
Deal found 24/6£419
Sat 27/611:35
LGW
-
YTZ
1 stop13h 40m
Air Transat
Wed 8/720:55
YTZ
-
LGW
1 stop31h 55m
Air Transat
Deal found 22/6£420
Fri 28/806:00
LHR
-
YYZ
1 stop11h 50m
Air Canada
Thu 3/918:35
YYZ
-
LHR
Nonstop7h 00m
Air Canada
Deal found 22/6£420
Thu 23/706:05
STN
-
YYZ
1 stop12h 35m
Multiple Airlines
Sun 26/718:15
YYZ
-
STN
2 stops23h 05m
Multiple Airlines
Deal found 23/6£420
Wed 1/709:40
LGW
-
YYZ
Nonstop8h 05m
Air Transat
Tue 7/719:10
YYZ
-
LGW
1 stop9h 40m
Air Transat
Deal found 24/6£420
Wed 1/706:15
LTN
-
YYZ
2 stops13h 45m
Multiple Airlines
Fri 10/723:55
YYZ
-
LTN
1 stop19h 35m
Multiple Airlines
Deal found 23/6£421
Wed 23/908:40
LHR
-
YYZ
1 stop12h 30m
Multiple Airlines
Sat 26/915:00
YYZ
-
LHR
1 stop10h 30m
Multiple Airlines
Deal found 22/6£421
Wed 1/722:45
STN
-
YYZ
2 stops21h 15m
Multiple Airlines
Mon 13/722:55
YYZ
-
STN
2 stops17h 00m
Multiple Airlines
Deal found 23/6£421

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 24 June 2026.

Round-trip from

£419

One-way from

£272

Popular in

August

Cheapest in

February

Average price

£474

Good round-trip deal

£445 or less

Good one-way deal

£261 or less
Air Canada
  • Air Canada
  • 6/10-16/10
  • 1 total stop
  • 19h 25m total
  • London to Ontario
Search Deals
24/9
  • 24/9
  • 1 total stop
  • 11h 25m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£32 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 24 June 2026.
Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Wed 14/10

16:25-14:00

1 stop26h 35m

Toronto Pearson Intl

Sun 18/10

22:55-09:45

1 stop29h 50m

£424

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Wed 16/9

19:50-11:00

1 stop20h 10m

Toronto Pearson Intl

Tue 29/9

19:15-22:50

1 stop22h 35m

£426

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 7/7

13:05-19:10

1 stop11h 05m

Toronto Pearson Intl

Thu 10/9

20:45-20:20

1 stop18h 35m

£426

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Thu 9/7

07:05-14:10

1 stop12h 05m

Toronto Pearson Intl

Tue 14/7

16:15-13:25

2 stops16h 10m

£428

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Fri 24/7

09:40-16:33

1 stop11h 53m

Toronto Island

Sun 26/7

16:55-07:55

1 stop10h 00m

£441

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Thu 9/7

11:35-20:13

1 stop13h 38m

Toronto Island

Tue 14/7

16:55-07:55

1 stop10h 00m

£443

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Wed 16/9

19:50-11:00

1 stop20h 10m

Toronto Pearson Intl

Wed 30/9

19:15-13:00

1 stop12h 45m

£449

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Sun 27/9

12:20-14:40

1 stop31h 20m

Toronto Pearson Intl

Thu 15/10

21:30-00:25

1 stop21h 55m

£449

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 30/9

07:30-17:19

2 stops14h 49m

Montreal Pierre Elliott Trudeau Intl

Sat 3/10

13:10-05:55

1 stop11h 45m

£450

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Wed 9/9

07:30-17:19

2 stops14h 49m

Montreal Pierre Elliott Trudeau Intl

Thu 24/9

11:23-06:55

2 stops14h 32m

£450

Flights are sorted by cheapest return flights first.

Deals found on 20/6

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, February is the cheapest month in which you can book a flight from London to Region of Ontario (average of £399). Flying from London to Region of Ontario in August is currently the most expensive (average of £604). 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 24 June 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 24 June 2026.

The most flights from LON to CAON are scheduled on a Monday (52 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 London to Region of Ontario?

How far ahead should I book a flight from London to Region of Ontario?

Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Region of Ontario. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 24 June 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
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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
7.8
Good
558 reviews
Air Transat
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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
690 reviews
Air Transat
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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
11,252 reviews
Air Transat
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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
8,092 reviews
Air Transat
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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
8,070 reviews
Air Transat
7.8
Good
558 reviews
Check prices

Entertainment

7.1

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Food

6.8

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?

    TAP AIR PORTUGAL, Icelandair, and Air Transat can get you from London to Region of Ontario in just under 11h 05m. Your travel time can differ by up to 15h 30m. There are 3543 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 KLM (£184), Icelandair (£202), and WestJet (£220).

  • 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 Ethiopian Air (90%), Aegean Airlines (89%) and Singapore Airlines (89%).

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

    The cheapest flight price from London to Region of Ontario is £321. On average you can expect to pay £1,186. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £159.

  • 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, February is the cheapest month in which you can book a flight from London to Region of Ontario (average of £399). Flying from London to Region of Ontario in August is currently the most expensive (average of £604). 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

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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.
Heathrow to Vancouver Intl flights
Heathrow to Pearson Intl flights
Gatwick to Pearson Intl flights
Gatwick to Vancouver Intl flights
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London City to Pearson Intl flights
Stansted to Vancouver Intl flights
Gatwick to Toronto Island flights
Heathrow to Pierre Elliott Trudeau Intl flights
Heathrow to Calgary flights
Luton to Pearson Intl flights
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Gatwick to Pierre Elliott Trudeau Intl flights
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Heathrow to Halifax flights
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Southend to Pearson Intl flights
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Manchester to Toronto Island flights
Edinburgh to Pearson Intl flights
Heathrow to Ottawa flights
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Luton to Calgary flights
Edinburgh to Vancouver Intl flights
Gatwick to Ottawa flights
Birmingham to Pearson Intl flights
Edinburgh to Toronto Island flights
Gatwick to Halifax flights
Heathrow to Winnipeg flights
Stansted to Halifax flights
Birmingham to Vancouver Intl flights
London City to Ottawa flights
Gatwick to Abbotsford flights
London City to Halifax flights
Manchester to Abbotsford flights
Luton to Halifax flights
Manchester to Calgary flights
Stansted to Ottawa flights
Edinburgh to Calgary flights
Heathrow to Edmonton flights
Manchester to Pierre Elliott Trudeau Intl flights
Heathrow to Victoria flights

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 24 June 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£276Average£348FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£277Average£429FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£324Average£535FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£332Average£512FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£333Average£559FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£337Average£479FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
DeltaCheapest£339Average£636FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£348Average£585FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£353Average£514FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£354Average£674FlexibilityNo cancel feeOn-time71%
Search American 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 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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