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Cheap flights from London to Ontario from £219

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
19 Mei — 26 Mei1
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 19 April 2026.

Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Jumaat 22/514:40
YOW
-
LHR
1 stop10h 50m
Multiple Airlines
Deal found 15/4£367
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Sabtu 23/514:40
YOW
-
LHR
1 stop10h 50m
Multiple Airlines
Deal found 16/4£368
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Selasa 19/514:40
YOW
-
LHR
1 stop10h 50m
Multiple Airlines
Deal found 15/4£370
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Austrian Airlines
Rabu 20/519:30
YOW
-
LHR
1 stop9h 05m
Austrian Airlines
Deal found 16/4£370
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Austrian Airlines
Isnin 25/520:05
YOW
-
LHR
1 stop10h 45m
Austrian Airlines
Deal found 14/4£371
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Austrian Airlines
Jumaat 22/520:05
YOW
-
LHR
1 stop10h 45m
Austrian Airlines
Deal found 15/4£373
Rabu 30/908:40
LHR
-
YOW
2 stops17h 10m
Air Canada
Rabu 7/1021:00
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 18/4£376
Ahad 7/614:05
LHR
-
YOW
1 stop11h 46m
Air Canada
Khamis 18/618:55
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 15/4£377
Khamis 4/620:05
LHR
-
YOW
2 stops26h 06m
Multiple Airlines
Khamis 11/618:55
YOW
-
LHR
Nonstop6h 35m
Multiple Airlines
Deal found 17/4£378
Jumaat 15/506:00
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Khamis 21/518:55
YOW
-
LHR
Nonstop6h 35m
Multiple Airlines
Deal found 18/4£379
Jumaat 5/606:00
LHR
-
YOW
2 stops16h 11m
Multiple Airlines
Jumaat 19/614:00
YOW
-
LHR
2 stops15h 00m
Multiple Airlines
Deal found 17/4£380
Selasa 12/521:35
LGW
-
YUL
3 stops31h 50m
Multiple Airlines
Selasa 19/519:20
YUL
-
LGW
2 stops22h 25m
Multiple Airlines
Deal found 14/4£386

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 19 April 2026.

Round-trip from

£367

One-way from

£219

Popular in

December

Cheapest in

February

Average price

£444

Good round-trip deal

£404 or less

Good one-way deal

£289 or less
Lufthansa
  • Lufthansa
  • 15/5-22/5
  • 3 total stops
  • 27h 01m total
  • London to Ontario
Search Deals
20/5
  • 20/5
  • 3 total stops
  • 37h 30m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£10 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 April 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 19 April 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

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Isnin 22/6

07:30-21:35

2 stops19h 05m

Ottawa

Isnin 29/6

15:10-10:40

2 stops14h 30m

£424

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Rabu 3/6

06:50-23:54

2 stops22h 04m

Ottawa

Khamis 11/6

06:05-21:20

1 stop10h 15m

£427

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Selasa 2/6

06:50-18:48

2 stops16h 58m

Ottawa

Isnin 15/6

15:10-07:15

1 stop11h 05m

£427

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Isnin 1/6

07:30-18:48

2 stops16h 18m

Ottawa

Isnin 8/6

19:30-14:40

2 stops14h 10m

£431
Fastest return journey

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sabtu 19/9

11:35-14:15

Nonstop7h 40m

Montreal Pierre Elliott Trudeau Intl

Selasa 29/9

22:05-09:50

Nonstop6h 45m

£438

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Sabtu 6/6

11:35-14:15

Nonstop7h 40m

Montreal Pierre Elliott Trudeau Intl

Ahad 14/6

22:05-09:50

Nonstop6h 45m

£456

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Khamis 10/9

09:30-16:00

1 stop11h 30m

Montreal Pierre Elliott Trudeau Intl

Sabtu 19/9

18:55-08:35

1 stop8h 40m

£475

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Ahad 5/7

11:35-14:15

Nonstop7h 40m

Montreal Pierre Elliott Trudeau Intl

Khamis 16/7

20:35-10:45

1 stop9h 10m

£475

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Ahad 24/5

09:40-18:58

1 stop14h 18m

Toronto Island

Ahad 7/6

16:55-07:55

1 stop10h 00m

£480

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Isnin 18/5

16:35-11:00

1 stop23h 25m

Toronto Pearson Intl

Selasa 26/5

19:15-22:50

1 stop22h 35m

£484

Flights are sorted by cheapest return flights first.

Deals found on 18/4

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 £387). Flying from London to Region of Ontario in December is currently the most expensive (average of £575). 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 19 April 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 19 April 2026.

The most flights from LON to CAON are scheduled on a Sunday (41 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (24 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 19 April 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
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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
536 reviews
Air Transat
7.7
Good
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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
687 reviews
Air Transat
7.7
Good
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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
10,941 reviews
Air Transat
7.7
Good
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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
7,930 reviews
Air Transat
7.7
Good
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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
7,895 reviews
Air Transat
7.7
Good
536 reviews
Check prices

Boarding

7.9

Entertainment

7.0

Food

6.8

Overall

7.7

Crew

8.4

Comfort

7.3

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?

    United Airlines, Air Transat, and Lufthansa can get you from London to Region of Ontario in just under 7h 40m. Your travel time can differ by up to 11h 25m. 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 (£180), Icelandair (£198), and TAP AIR PORTUGAL (£213).

  • 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 Thai Airways (80%), United Airlines (79%) and Lufthansa (79%).

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

    The cheapest flight price from London to Region of Ontario is £329. On average you can expect to pay £932. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £408.

  • 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 £387). Flying from London to Region of Ontario in December is currently the most expensive (average of £575). 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 Vancouver Intl flights
Gatwick to Pearson Intl flights
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Heathrow to Pierre Elliott Trudeau Intl flights
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Stansted to Pearson Intl flights
Stansted to Vancouver Intl flights
Heathrow to Calgary flights
Gatwick to Toronto Island flights
Luton to Pearson Intl flights
Manchester to Pearson Intl flights
Heathrow to Abbotsford flights
Gatwick to Pierre Elliott Trudeau Intl flights
Gatwick to Calgary flights
Heathrow to Ottawa flights
London City to Calgary flights
London City to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
Manchester to Vancouver Intl flights
Luton to Vancouver Intl flights
Heathrow to Halifax flights
Stansted to Calgary flights
Edinburgh to Vancouver Intl flights
Edinburgh to Pearson Intl flights
Luton to Calgary flights
Manchester to Toronto Island flights
Birmingham to Vancouver Intl flights
Gatwick to Ottawa flights
Stansted to Ottawa flights
Bristol to Vancouver Intl flights
Heathrow to Edmonton flights
Leeds to Vancouver Intl flights
Stansted to Halifax flights
Birmingham to Pearson Intl flights
Newcastle upon Tyne to Vancouver Intl flights
Edinburgh to Halifax flights
Gatwick to Edmonton flights
Gatwick to Halifax flights
London City to Halifax flights
London City to Edmonton flights
Heathrow to Winnipeg flights
Edinburgh to Toronto Island flights
Luton to Halifax flights
Edinburgh to Calgary 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 19 April 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£270Average£344FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£270Average£410FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air TransatCheapest£306Average£427FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£308Average£544FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
DeltaCheapest£317Average£569FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£317Average£564FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Aer LingusCheapest£324Average£508FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£333Average£696FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
United AirlinesCheapest£333Average£448FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£334Average£461FlexibilityNo 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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