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Cheap flights from London to Ontario from £260

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
6 Sep — 13 Sep1
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 7 August 2026.

Thu 3/913:50 -
1 stop30h 10m
Sat 12/918:40 -
Nonstop6h 50m
Deal found 7/8£383
Tue 1/911:35 -
Nonstop7h 40m
Thu 15/1016:15 -
1 stop13h 30m
Deal found 7/8£384
Wed 9/908:40 -
1 stop11h 20m
Fri 18/918:40 -
Nonstop6h 50m
Deal found 7/8£384
Mon 21/919:35 -
1 stop21h 00m
Mon 28/914:55 -
2 stops23h 40m
Deal found 7/8£385
Fri 25/906:00 -
1 stop14h 00m
Sun 27/918:25 -
1 stop22h 10m
Deal found 6/8£385
Tue 8/912:40 -
1 stop11h 52m
Sat 3/1022:05 -
Nonstop6h 45m
Deal found 6/8£386
Fri 4/914:05 -
Nonstop7h 35m
Fri 25/916:35 -
1 stop10h 05m
Deal found 7/8£386
Wed 2/911:35 -
Nonstop7h 40m
Sat 12/918:50 -
2 stops32h 05m
Deal found 7/8£386
Mon 21/909:30 -
1 stop11h 30m
Mon 28/913:10 -
1 stop12h 20m
Deal found 7/8£386
Fri 4/911:35 -
Nonstop7h 40m
Fri 25/920:35 -
1 stop9h 10m
Deal found 7/8£387
Wed 26/809:30 -
1 stop11h 30m
Fri 18/918:40 -
Nonstop6h 50m
Deal found 6/8£387
Thu 3/909:40 -
1 stop12h 40m
Thu 10/918:00 -
1 stop11h 45m
Deal found 6/8£388

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 7 August 2026.

Round-trip from

£383

One-way from

£260

Popular in

August

Cheapest in

February

Average price

£586

Good round-trip deal

£464 or less

Good one-way deal

£297 or less
Air Canada
  • Air Canada
  • 27/8-18/9
  • 1 total stop
  • 23h 45m total
  • London to Ontario
Search Deals
24/9
  • 24/9
  • 2 total stops
  • 17h 43m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£37 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 August 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 7 August 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

LondonMontreal

LGW London Gatwick - YUL Montreal Pierre Elliott Trudeau Intl

LGWYUL

London Gatwick

Fri 11/9

11:35-14:15

Nonstop7h 40m

Montreal Pierre Elliott Trudeau Intl

Wed 16/9

20:35-07:55

1 stop30h 20m

£394

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Mon 21/9

06:20-15:50

1 stop14h 30m

Toronto Pearson Intl

Fri 9/10

22:00-10:15

Nonstop7h 15m

£402

LondonToronto

LTN London Luton - YYZ Toronto Pearson Intl

LTNYYZ

London Luton

Mon 21/9

08:50-11:00

1 stop31h 10m

Toronto Pearson Intl

Mon 28/9

19:15-22:05

1 stop21h 50m

£406
Fastest return journey

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Sat 12/9

11:35-18:28

1 stop11h 53m

Toronto Pearson Intl

Tue 15/9

22:45-10:45

Nonstop7h 00m

£412

LondonToronto

LGW London Gatwick - YTZ Toronto Island

LGWYTZ

London Gatwick

Sun 13/9

09:40-16:30

1 stop11h 50m

Toronto Island

Sun 20/9

16:55-07:55

1 stop10h 00m

£415

LondonToronto

LGW London Gatwick - YTZ Toronto Island

LGWYTZ

London Gatwick

Sun 13/9

09:40-18:55

1 stop14h 15m

Toronto Island

Fri 9/10

16:55-07:55

1 stop10h 00m

£416

LondonMontreal

LGW London Gatwick - YUL Montreal Pierre Elliott Trudeau Intl

LGWYUL

London Gatwick

Fri 15/1

11:40-22:20

1 stop15h 40m

Montreal Pierre Elliott Trudeau Intl

Mon 25/1

06:45-09:45

1 stop22h 00m

£416

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Wed 16/9

19:35-15:50

1 stop25h 15m

Toronto Pearson Intl

Mon 12/10

17:35-12:00

1 stop13h 25m

£422

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Wed 9/9

07:30-17:19

2 stops14h 49m

Montreal Pierre Elliott Trudeau Intl

Sun 20/9

11:23-05:55

1 stop13h 32m

£426

LondonToronto

LTN London Luton - YYZ Toronto Pearson Intl

LTNYYZ

London Luton

Mon 21/9

08:50-11:00

1 stop31h 10m

Toronto Pearson Intl

Tue 29/9

19:15-18:30

1 stop18h 15m

£428

Flights are sorted by cheapest return flights first.

Deals found on 6/8

Showing 1-10 of 60 resultsSorted by cheapest first
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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, February is the cheapest month in which you can book a flight from London to Region of Ontario (average of £400). Flying from London to Region of Ontario in August is currently the most expensive (average of £605). 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 7 August 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 7 August 2026.

The most flights from LON to CAON are scheduled on a Wednesday (38 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (13 on average).

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

Airfare is below average for this route at the moment.
London to Region of Ontario flights typically cost between £492 and £707 in September.
The cheapest return price found within the last 5 days was £394 on Aer Lingus (11 Sept–15 Sept).

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

Booking 37 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 7 August 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
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Transat
7.8
Good
572 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Virgin Atlantic
7.5
Good
694 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Air Canada
7.1
Good
11,449 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Icelandair
6.9
Okay
723 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.
Lufthansa
6.8
Okay
8,177 reviews
Air Transat
7.8
Good
572 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Comfort

7.3

Crew

8.5

Overall

7.8

Food

6.8

Reviews

1 / 20
10.0
Excellent

Liam,Jun 2025

GLA - YYZ

To and from Glasgow with Air Transat. Excellent flights, food, service. Nothing but praise.

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 United Airlines can get you from London to Region of Ontario in just under 7h 40m. Your travel time can differ by up to 7h 09m. There are 3258 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 SAUDIA (94%), Thai Airways (87%) and KLM (83%).

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

    The cheapest flight price from London to Region of Ontario is £309. On average you can expect to pay £1,667. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £370.

  • 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 £400). Flying from London to Region of Ontario in August is currently the most expensive (average of £605). 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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Edinburgh to Winnipeg flights
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Gatwick to Abbotsford flights
London City to Edmonton flights
Stansted to Halifax flights
Heathrow to London flights
London City to Halifax 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 7 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£175Average£472FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
ITA AirwaysCheapest£263Average£671FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
IcelandairCheapest£272Average£425FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£319Average£515FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£330Average£509FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£334Average£555FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£342Average£590FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest£347Average£668FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£362Average£561FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£363Average£535FlexibilityNo cancel feeOn-time70%
Search British Airways 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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