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Cheap flights from London to Ontario from £264

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 20/5. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
21 Feb — 28 Feb1
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 22 January 2026.

Fri 6/306:50
LHR
-
YYZ
2 stops14h 50m
Air Canada
Sun 17/518:30
YYZ
-
LHR
Nonstop7h 05m
Air Canada
Deal found 21/1£330
Sun 3/513:00
LGW
-
YYZ
1 stop11h 10m
Icelandair
Tue 12/523:10
YYZ
-
LGW
1 stop10h 30m
Icelandair
Deal found 20/1£330
Fri 8/511:35
LGW
-
YTZ
1 stop12h 45m
Air Transat
Fri 15/516:55
YTZ
-
LGW
1 stop10h 00m
Air Transat
Deal found 21/1£331
Sun 15/218:00
LHR
-
YYZ
Nonstop8h 10m
Air Canada
Mon 23/206:15
YYZ
-
LHR
1 stop9h 20m
Air Canada
Deal found 22/1£331
Thu 5/211:40
LGW
-
YYZ
Nonstop8h 20m
Air Transat
Thu 19/221:35
YYZ
-
LGW
Nonstop7h 10m
Air Transat
Deal found 21/1£331
Tue 21/413:30
LHR
-
YYZ
1 stop11h 05m
Lufthansa
Thu 30/421:30
YYZ
-
LHR
Nonstop7h 05m
Lufthansa
Deal found 20/1£331
Fri 13/311:40
LGW
-
YYZ
Nonstop8h 20m
Air Transat
Wed 18/322:35
YYZ
-
LGW
Nonstop7h 10m
Air Transat
Deal found 20/1£331
Wed 15/408:40
LHR
-
YTZ
2 stops14h 12m
Multiple Airlines
Tue 21/412:30
YTZ
-
LHR
2 stops14h 25m
Multiple Airlines
Deal found 22/1£331
Thu 16/411:30
LHR
-
YYZ
1 stop13h 05m
Multiple Airlines
Tue 21/406:15
YYZ
-
LHR
1 stop9h 45m
Multiple Airlines
Deal found 21/1£332
Mon 9/211:40
LGW
-
YYZ
Nonstop8h 20m
Air Transat
Wed 18/221:35
YYZ
-
LGW
Nonstop7h 10m
Air Transat
Deal found 21/1£332
Sun 3/511:35
LGW
-
YTZ
1 stop15h 45m
Air Transat
Sat 16/508:40
YTZ
-
LGW
1 stop20h 10m
Air Transat
Deal found 20/1£333
Wed 11/220:15
LHR
-
YYZ
1 stop23h 35m
Multiple Airlines
Thu 19/219:15
YYZ
-
LHR
1 stop20h 20m
Multiple Airlines
Deal found 21/1£333

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 22 January 2026.

Round-trip from

£330

One-way from

£264

Popular in

December

Cheapest in

February

Average price

£391

Good round-trip deal

£370 or less

Good one-way deal

£281 or less
Air Canada
  • Air Canada
  • 6/3-20/5
  • 2 total stops
  • 22h 55m total
  • London to Ontario
Search Deals
30/1
  • 30/1
  • 2 total stops
  • 34h 40m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£21 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 January 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 22 January 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 - YTZ

LGWYTZ

London Gatwick

Fri 8/5

11:35-19:20

1 stop12h 45m

Toronto Island

Fri 15/5

16:55-07:55

1 stop10h 00m

£331

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Mon 9/2

11:40-15:00

Nonstop8h 20m

Toronto Pearson Intl

Wed 18/2

21:35-09:45

Nonstop7h 10m

£332

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Sun 3/5

11:35-19:20

1 stop12h 45m

Toronto Island

Sat 16/5

11:15-09:50

1 stop17h 35m

£335

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Tue 28/4

07:25-14:25

1 stop12h 00m

Toronto Pearson Intl

Thu 7/5

16:05-06:30

1 stop9h 25m

£337

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Sat 18/4

12:40-16:00

Nonstop8h 20m

Toronto Pearson Intl

Fri 24/4

22:35-10:45

Nonstop7h 10m

£338

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Sun 8/3

11:55-19:15

1 stop11h 20m

Toronto Pearson Intl

Sat 23/5

20:45-14:40

1 stop12h 55m

£340

LondonToronto

LHR - YTZ

LHRYTZ

London Heathrow

Fri 6/2

12:00-18:13

1 stop11h 13m

Toronto Island

Mon 9/2

12:30-07:10

1 stop13h 40m

£340

LondonToronto

LCY - YYZ

LCYYYZ

London City

Tue 10/3

19:10-17:10

1 stop26h 00m

Toronto Pearson Intl

Tue 17/3

21:25-12:55

1 stop11h 30m

£348

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sun 8/3

11:10-15:20

Nonstop8h 10m

Toronto Pearson Intl

Thu 21/5

18:30-06:35

Nonstop7h 05m

£348

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Mon 9/3

13:00-16:50

Nonstop7h 50m

Toronto Pearson Intl

Thu 21/5

20:15-08:35

Nonstop7h 20m

£348

Flights are sorted by cheapest return flights first.

Deals found on 21/1

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 £243). Flying from London to Region of Ontario in December is currently the most expensive (average of £364). 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 22 January 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 22 January 2026.

The most flights from LON to CAON are scheduled on a Monday (37 on average). You will have fewer flight options on Saturday, 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?

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 22 January 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
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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
499 reviews
Air Transat
7.7
Good
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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
678 reviews
Air Transat
7.7
Good
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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
10,646 reviews
Air Transat
7.7
Good
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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
7,736 reviews
Air Transat
7.7
Good
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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
7,689 reviews
Air Transat
7.7
Good
499 reviews
Check prices

Boarding

7.9

Comfort

7.3

Overall

7.7

Crew

8.4

Entertainment

7.0

Food

6.7

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, Lufthansa, and Icelandair can get you from London to Region of Ontario in just under 11h 20m. Your travel time can differ by up to 1h 25m. 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 KLM (£191), Air Transat (£203), and Scandinavian Airlines (£209).

  • 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 (94%), Air France (94%) and Delta (94%).

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

    The cheapest flight price from London to Region of Ontario is £276. On average you can expect to pay £964. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £281.

  • 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 £243). Flying from London to Region of Ontario in December is currently the most expensive (average of £364). 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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London City to Ottawa flights
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Heathrow to St. John's flights
Birmingham to Vancouver Intl 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 22 January 2026.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£256Average£270FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
SWISSCheapest£271Average£339FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£285Average£442FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£294Average£401FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£300Average£454FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapest£304Average£525FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£306Average£499FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£310Average£528FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Aer LingusCheapest£314Average£504FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£316Average£476FlexibilityNo cancel feeOn-time76%
Search Lufthansa 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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