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Cheap flights from London to Ontario from £258

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
26 Jun — 3 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 27 May 2026.

Sat 30/511:35
LGW
-
YTZ
1 stop13h 40m
Air Transat
Fri 12/618:55
YTZ
-
LGW
1 stop9h 55m
Air Transat
Deal found 22/5£423
Mon 7/921:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Thu 17/920:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 22/5£423
Mon 15/620:50
STN
-
YYZ
3 stops30h 10m
Multiple Airlines
Thu 18/623:05
YYZ
-
STN
1 stop18h 20m
Multiple Airlines
Deal found 23/5£423
Wed 3/611:35
LGW
-
YYZ
1 stop11h 05m
Air Transat
Wed 10/622:45
YYZ
-
LGW
Nonstop7h 00m
Air Transat
Deal found 24/5£423
Fri 24/706:20
LTN
-
YYZ
2 stops20h 45m
Multiple Airlines
Wed 5/823:10
YYZ
-
LTN
2 stops17h 05m
Multiple Airlines
Deal found 25/5£424
Fri 5/609:40
LGW
-
YTZ
1 stop31h 23m
Air Transat
Mon 15/619:05
YTZ
-
LGW
1 stop31h 50m
Air Transat
Deal found 24/5£424
Tue 1/913:05
LHR
-
YYZ
1 stop14h 00m
Icelandair
Tue 8/920:45
YYZ
-
LHR
1 stop18h 35m
Icelandair
Deal found 22/5£424
Thu 2/706:30
STN
-
YYZ
2 stops22h 55m
Multiple Airlines
Tue 7/721:55
YYZ
-
STN
2 stops18h 25m
Multiple Airlines
Deal found 23/5£424
Sat 30/511:35
LGW
-
YYZ
1 stop12h 03m
Air Transat
Tue 9/615:40
YYZ
-
LGW
1 stop13h 10m
Air Transat
Deal found 23/5£424
Thu 28/507:30
LTN
-
YYZ
1 stop11h 10m
Multiple Airlines
Wed 3/621:55
YYZ
-
LTN
2 stops18h 20m
Multiple Airlines
Deal found 24/5£425
Mon 8/611:35
LGW
-
YTZ
1 stop10h 50m
Air Transat
Wed 1/720:55
YTZ
-
LGW
1 stop31h 55m
Air Transat
Deal found 25/5£425
Mon 7/921:25
LHR
-
YYZ
1 stop26h 45m
Icelandair
Tue 15/920:45
YYZ
-
LHR
1 stop10h 10m
Icelandair
Deal found 26/5£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 27 May 2026.

Round-trip from

£423

One-way from

£258

Popular in

December

Cheapest in

February

Average price

£463

Good round-trip deal

£380 or less

Good one-way deal

£314 or less
15/6-18/6
  • 15/6-18/6
  • 4 total stops
  • 48h 30m total
  • London to Ontario
Search Deals
13/7
  • 13/7
  • 3 total stops
  • 34h 15m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 0% potential increase in price (£3 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 May 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 27 May 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 7/6

09:40-16:33

1 stop11h 53m

Toronto Island

Fri 19/6

16:55-07:55

1 stop10h 00m

£430

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Fri 5/6

09:40-16:33

1 stop11h 53m

Toronto Island

Fri 19/6

16:55-07:55

1 stop10h 00m

£430

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Fri 26/6

22:50-14:00

1 stop20h 10m

Toronto Pearson Intl

Sat 27/6

19:15-10:15

1 stop10h 00m

£445

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Sun 28/6

13:05-20:15

1 stop12h 10m

Toronto Island

Sat 11/7

16:55-09:50

1 stop11h 55m

£446

LondonToronto

LGW - YTZ

LGWYTZ

London Gatwick

Fri 10/7

09:40-21:53

1 stop17h 13m

Toronto Island

Sat 11/7

16:55-11:20

1 stop13h 25m

£454

LondonMontreal

LGW - YUL

LGWYUL

London Gatwick

Mon 22/6

16:20-11:35

1 stop24h 15m

Montreal Pierre Elliott Trudeau Intl

Mon 29/6

18:50-21:05

1 stop21h 15m

£456

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Mon 10/8

19:50-13:20

2 stops22h 30m

Toronto Pearson Intl

Sun 30/8

19:15-12:05

1 stop11h 50m

£459

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Mon 5/10

19:25-11:00

1 stop20h 35m

Toronto Pearson Intl

Fri 23/10

19:15-16:20

1 stop16h 05m

£462

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Fri 16/10

10:35-21:05

1 stop15h 30m

Toronto Pearson Intl

Sun 1/11

17:25-15:45

1 stop17h 20m

£463

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Mon 14/9

09:30-15:58

1 stop11h 28m

Montreal Pierre Elliott Trudeau Intl

Mon 28/9

22:10-10:00

Nonstop6h 50m

£480

Flights are sorted by cheapest return flights first.

Deals found on 21/5

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 £583). 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 27 May 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 27 May 2026.

The most flights from LON to CAON are scheduled on a Tuesday (41 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (18 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 78 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 27 May 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
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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
553 reviews
Air Transat
7.8
Good
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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
11,091 reviews
Air Transat
7.8
Good
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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
8,032 reviews
Air Transat
7.8
Good
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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
8,005 reviews
Air Transat
7.8
Good
553 reviews
Check prices

Overall

7.8

Boarding

7.9

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

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, TAP AIR PORTUGAL, and Lufthansa can get you from London to Region of Ontario in just under 11h 28m. Your travel time can differ by up to 4h 02m. There are 3239 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 City - Toronto Pearson Intl.

  • 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 United Airlines (85%), Lufthansa (85%) and MEA (84%).

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

    The cheapest flight price from London to Region of Ontario is £319. On average you can expect to pay £1,152. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £350.

  • 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 £583). 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 Pearson Intl flights
Heathrow to Vancouver Intl flights
Gatwick to Pearson Intl flights
Gatwick to Vancouver Intl flights
London City to Pearson Intl flights
Stansted to Pearson Intl flights
Heathrow to Toronto Island flights
London City to Vancouver Intl flights
Stansted to Vancouver Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Luton to Pearson Intl flights
Gatwick to Toronto Island flights
Heathrow to Calgary flights
Manchester to Pearson Intl flights
Heathrow to Abbotsford flights
Gatwick to Pierre Elliott Trudeau Intl flights
Southend to Pearson Intl flights
Luton to Vancouver Intl flights
Edinburgh to Pearson Intl flights
Gatwick to Calgary flights
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London City to Pierre Elliott Trudeau Intl flights
Heathrow to Halifax flights
London City to Calgary flights
Stansted to Pierre Elliott Trudeau Intl flights
Manchester to Toronto Island flights
Heathrow to Ottawa flights
Luton to Pierre Elliott Trudeau Intl flights
Stansted to Calgary flights
Edinburgh to Vancouver Intl flights
Luton to Calgary flights
Edinburgh to Toronto Island flights
Birmingham to Pearson Intl flights
Gatwick to Halifax flights
Birmingham to Vancouver Intl flights
Stansted to Halifax flights
Heathrow to Winnipeg flights
Manchester to Calgary flights
Heathrow to Edmonton flights
Gatwick to Ottawa flights
Luton to Halifax flights
Manchester to Pierre Elliott Trudeau Intl flights
Birmingham to Toronto Island flights
London City to Halifax flights
London City to Ottawa flights
Gatwick to Edmonton flights
Manchester to Abbotsford flights
Stansted to Ottawa flights
Heathrow to Kelowna 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 27 May 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest£271Average£345FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£272Average£419FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£318Average£544FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£319Average£458FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
DeltaCheapest£323Average£613FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Aer LingusCheapest£325Average£537FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
TAP AIR PORTUGALCheapest£327Average£549FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£332Average£464FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
LufthansaCheapest£336Average£694FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapest£338Average£576FlexibilityNo 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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