Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from London to Ontario from £259

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YYZ
1 Sep — 8 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 2 August 2026.

Thu 10/911:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Fri 18/912:00
YUL
-
LGW
2 stops14h 55m
Air Transat
Deal found 30/7£391
Wed 9/914:05
LHR
-
YUL
Nonstop7h 35m
Air Canada
Sun 20/918:40
YUL
-
LHR
Nonstop6h 50m
Air Canada
Deal found 1/8£391
Wed 2/909:40
LGW
-
YUL
1 stop12h 22m
Air Transat
Wed 9/922:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Deal found 30/7£392
Mon 7/906:00
LHR
-
YUL
1 stop14h 00m
SWISS
Wed 23/920:40
YUL
-
LHR
1 stop14h 55m
SWISS
Deal found 1/8£392
Sun 4/1011:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Wed 14/1020:35
YUL
-
LGW
1 stop9h 10m
Air Transat
Deal found 31/7£393
Mon 31/809:30
LHR
-
YUL
1 stop11h 30m
Air Canada
Wed 9/918:55
YUL
-
LHR
1 stop8h 40m
Air Canada
Deal found 30/7£393
Fri 28/818:00
LGW
-
YUL
1 stop22h 35m
Multiple Airlines
Sun 6/921:30
YUL
-
LGW
1 stop20h 10m
Multiple Airlines
Deal found 28/7£394
Thu 10/914:05
LHR
-
YUL
Nonstop7h 35m
Air Canada
Fri 18/918:40
YUL
-
LHR
Nonstop6h 50m
Air Canada
Deal found 30/7£394
Mon 28/909:40
LGW
-
YUL
1 stop12h 22m
Air Transat
Thu 22/1022:05
YUL
-
LGW
Nonstop6h 45m
Air Transat
Deal found 30/7£394
Sat 12/920:05
LHR
-
YUL
1 stop23h 55m
Multiple Airlines
Sat 19/918:40
YUL
-
LHR
Nonstop6h 50m
Multiple Airlines
Deal found 29/7£394
Sat 29/811:35
LGW
-
YUL
Nonstop7h 40m
Air Transat
Sat 19/916:15
YUL
-
LGW
1 stop10h 40m
Air Transat
Deal found 1/8£395
Tue 15/917:55
LHR
-
YUL
1 stop21h 45m
Air Canada
Sun 27/922:10
YUL
-
LHR
Nonstop6h 50m
Air Canada
Deal found 2/8£395

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 2 August 2026.

Round-trip from

£391

One-way from

£259

Popular in

August

Cheapest in

February

Average price

£580

Good round-trip deal

£443 or less

Good one-way deal

£314 or less
Air Transat
  • Air Transat
  • 10/9-18/9
  • 2 total stops
  • 22h 35m total
  • London to Ontario
Search Deals
2/11
  • 2/11
  • 1 total stop
  • 24h 55m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£36 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 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 2 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

LondonToronto

STN - YYZ

STNYYZ

London Stansted

Tue 8/9

21:55-11:00

1 stop18h 05m

Toronto Pearson Intl

Tue 15/9

19:15-20:30

1 stop20h 15m

£403

LondonToronto

LHR - YYZ

LHRYYZ

London Heathrow

Sat 26/9

19:10-15:50

1 stop25h 40m

Toronto Pearson Intl

Mon 12/10

18:05-06:15

Nonstop7h 10m

£407

LondonToronto

LCY - YYZ

LCYYYZ

London City

Fri 16/10

09:15-16:10

1 stop11h 55m

Toronto Pearson Intl

Mon 19/10

20:05-12:35

1 stop11h 30m

£409

LondonToronto

LCY - YYZ

LCYYYZ

London City

Tue 10/11

19:05-16:15

1 stop26h 10m

Toronto Pearson Intl

Mon 16/11

20:25-12:50

1 stop11h 25m

£410

LondonToronto

LCY - YYZ

LCYYYZ

London City

Wed 14/10

09:15-16:10

1 stop11h 55m

Toronto Pearson Intl

Wed 21/10

20:05-12:35

1 stop11h 30m

£410

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Tue 13/10

16:25-14:00

1 stop26h 35m

Toronto Pearson Intl

Sun 18/10

22:55-09:45

1 stop29h 50m

£414
Fastest return journey

LondonToronto

LGW - YYZ

LGWYYZ

London Gatwick

Sat 17/10

09:40-12:45

Nonstop8h 05m

Toronto Pearson Intl

Fri 30/10

22:35-09:45

Nonstop7h 10m

£417

LondonToronto

LTN - YYZ

LTNYYZ

London Luton

Tue 8/9

19:00-11:00

1 stop21h 00m

Toronto Pearson Intl

Tue 15/9

19:15-18:30

1 stop18h 15m

£419

LondonToronto

LTN - YYZ

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

£420

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 27/8

06:50-16:10

2 stops14h 20m

Montreal Pierre Elliott Trudeau Intl

Thu 3/9

08:30-05:55

2 stops16h 25m

£422

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 £398). Flying from London to Region of Ontario in August is currently the most expensive (average of £603). 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 2 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 2 August 2026.

The most flights from LON to CAON are scheduled on a Friday (42 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (17 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 £487 and £701 in September.
The cheapest return price found within the last 5 days was £397 on Air Canada (3 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 2 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
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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
569 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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
11,419 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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
7.0
Good
717 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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
8,172 reviews
Air Transat
7.8
Good
569 reviews
Check prices

Comfort

7.3

Crew

8.5

Overall

7.8

Boarding

8.0

Entertainment

7.1

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?

    British Airways, SWISS, and TAP AIR PORTUGAL can get you from London to Region of Ontario in just under 11h 55m. Your travel time can differ by up to 14h 40m. There are 3562 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 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 Singapore Airlines (84%), Thai Airways (84%) and Egyptair (82%).

  • 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 £1,651. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £347.

  • 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 £398). Flying from London to Region of Ontario in August is currently the most expensive (average of £603). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Toronto Island flights
Heathrow to Calgary flights
Stansted to Pearson Intl flights
London City to Vancouver Intl flights
London City to Pearson 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 Abbotsford flights
Manchester to Pearson Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
Luton to Vancouver Intl flights
Gatwick to Calgary flights
Southend to Pearson Intl flights
London City to Calgary flights
Stansted to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Edinburgh to Pearson Intl flights
Manchester to Vancouver Intl flights
Heathrow to Halifax flights
Luton to Pierre Elliott Trudeau Intl flights
Stansted to Calgary flights
Luton to Calgary flights
Manchester to Toronto Island flights
Heathrow to Ottawa flights
Edinburgh to Vancouver Intl flights
Heathrow to Winnipeg flights
Birmingham to Pearson Intl flights
London City to Ottawa flights
Gatwick to Halifax flights
Heathrow to Edmonton flights
Edinburgh to Toronto Island flights
Heathrow to Victoria flights
London City to Halifax flights
Manchester to Abbotsford flights
Manchester to Calgary flights
Stansted to Halifax flights
Gatwick to Ottawa flights
Gatwick to Victoria flights
Gatwick to Edmonton flights
Stansted to Ottawa flights
Birmingham to Vancouver Intl flights
Gatwick to Abbotsford flights
Birmingham to Toronto Island 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 2 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£175Average£471FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
ITA AirwaysCheapest£263Average£670FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
IcelandairCheapest£271Average£424FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Air FranceCheapest£318Average£514FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapest£330Average£508FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£333Average£554FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£342Average£589FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
American AirlinesCheapest£347Average£666FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Aer LingusCheapest£361Average£560FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
British AirwaysCheapest£362Average£533FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.