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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 13/7. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
4 Jul — 11 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 4 June 2026.

Fri 26/611:35
LGW
-
YTZ
1 stop26h 50m
Air Transat
Sun 19/720:55
YTZ
-
LGW
1 stop31h 55m
Air Transat
Deal found 2/6£423
Mon 29/611:40
LTN
-
YYZ
3 stops32h 15m
Multiple Airlines
Thu 13/822:15
YYZ
-
LTN
2 stops18h 10m
Multiple Airlines
Deal found 3/6£423
Fri 12/609:40
LGW
-
YTZ
1 stop11h 53m
Air Transat
Sat 13/617:00
YTZ
-
LGW
1 stop11h 50m
Air Transat
Deal found 4/6£423
Thu 1/1006:30
LHR
-
YYZ
1 stop11h 50m
Virgin Atlantic
Thu 15/1022:55
YYZ
-
LHR
Nonstop7h 15m
Virgin Atlantic
Deal found 3/6£423
Mon 20/708:00
STN
-
YYZ
1 stop11h 10m
Multiple Airlines
Wed 29/721:55
YYZ
-
STN
1 stop17h 35m
Multiple Airlines
Deal found 3/6£423
Sat 6/609:40
LGW
-
YYZ
Nonstop8h 05m
Air Transat
Tue 16/622:45
YYZ
-
LGW
Nonstop7h 00m
Air Transat
Deal found 3/6£423
Tue 30/609:40
LGW
-
YTZ
1 stop11h 53m
Air Transat
Thu 9/710:55
YTZ
-
LGW
1 stop17h 55m
Air Transat
Deal found 3/6£424
Mon 7/921:25
LHR
-
YYZ
1 stop29h 40m
Icelandair
Fri 11/920:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Deal found 3/6£424
Sat 20/606:35
STN
-
YYZ
1 stop12h 25m
Multiple Airlines
Sun 28/619:15
YYZ
-
STN
1 stop23h 35m
Multiple Airlines
Deal found 1/6£424
Wed 10/610:45
LGW
-
YYZ
1 stop11h 25m
WestJet
Mon 15/616:15
YYZ
-
LGW
1 stop12h 10m
WestJet
Deal found 4/6£424
Sun 23/814:05
LHR
-
YTZ
1 stop10h 46m
Air Canada
Fri 13/1112:30
YTZ
-
LHR
1 stop13h 40m
Air Canada
Deal found 3/6£424
Tue 16/609:40
LTN
-
YYZ
1 stop10h 15m
Multiple Airlines
Tue 30/619:15
YYZ
-
LTN
1 stop18h 15m
Multiple Airlines
Deal found 1/6£425

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 4 June 2026.

Round-trip from

£423

One-way from

£255

Popular in

December

Cheapest in

February

Average price

£429

Good round-trip deal

£385 or less

Good one-way deal

£314 or less
Air Transat
  • Air Transat
  • 26/6-19/7
  • 2 total stops
  • 58h 45m total
  • London to Ontario
Search Deals
13/7
  • 13/7
  • 1 total stop
  • 23h 40m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£2 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 4 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 - YTZ

LGWYTZ

London Gatwick

Sun 30/8

09:40-16:33

1 stop11h 53m

Toronto Island

Sun 13/9

16:55-07:55

1 stop10h 00m

£428

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Thu 2/7

09:40-12:45

Nonstop8h 05m

Toronto Pearson Intl

Mon 6/7

19:50-07:55

Nonstop7h 05m

£432

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Sun 30/8

13:05-20:15

1 stop12h 10m

Toronto Island

Thu 17/9

18:55-09:50

1 stop9h 55m

£433

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Mon 22/6

12:40-15:40

Nonstop8h 00m

Toronto Pearson Intl

Thu 9/7

22:45-10:45

Nonstop7h 00m

£433

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Mon 15/6

09:40-12:45

Nonstop8h 05m

Toronto Pearson Intl

Sat 20/6

22:45-10:45

Nonstop7h 00m

£437

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Tue 8/9

19:00-11:00

1 stop21h 00m

Toronto Pearson Intl

Tue 15/9

19:15-22:50

1 stop22h 35m

£450

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 22/10

17:05-20:10

Nonstop8h 05m

Toronto Pearson Intl

Mon 2/11

22:05-10:10

Nonstop7h 05m

£451

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Sun 13/9

18:05-11:00

1 stop21h 55m

Toronto Pearson Intl

Tue 29/9

19:15-22:50

1 stop22h 35m

£453

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Tue 22/9

09:40-17:10

1 stop12h 30m

Toronto Pearson Intl

Wed 7/10

23:45-21:50

1 stop17h 05m

£463

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Thu 10/9

08:50-15:50

1 stop12h 00m

Toronto Pearson Intl

Mon 28/9

22:00-10:15

Nonstop7h 15m

£464

Flights are sorted by cheapest return flights first.

Deals found on 31/5

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 £392). Flying from London to Region of Ontario in December is currently the most expensive (average of £584). 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 4 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 4 June 2026.

The most flights from LON to CAON are scheduled on a Tuesday (41 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (21 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 80 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 4 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
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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
554 reviews
Air Transat
7.8
Good
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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
689 reviews
Air Transat
7.8
Good
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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
11,126 reviews
Air Transat
7.8
Good
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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
8,036 reviews
Air Transat
7.8
Good
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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
8,025 reviews
Air Transat
7.8
Good
554 reviews
Check prices

Crew

8.5

Boarding

7.9

Overall

7.8

Comfort

7.3

Food

6.8

Entertainment

7.1

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?

    Air Transat, British Airways, and Lufthansa can get you from London to Region of Ontario in just under 8h 05m. Your travel time can differ by up to 3h 48m. 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 (£181), Icelandair (£199), and WestJet (£216).

  • 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 MEA (91%), Singapore Airlines (91%) and Aegean Airlines (90%).

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

    The cheapest flight price from London to Region of Ontario is £305. On average you can expect to pay £1,156. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £307.

  • 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 £392). Flying from London to Region of Ontario in December is currently the most expensive (average of £584). 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.
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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 4 June 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£271Average£346FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£272Average£424FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£319Average£552FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£321Average£460FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapest£324Average£614FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£326Average£546FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£327Average£550FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£333Average£466FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£338Average£532FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£342Average£578FlexibilityNo cancel feeOn-time67%
Search Air Canada 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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