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Cheap flights from London to Ontario from £221

LON — YYZ
22 Sep — 29 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

Mon 14/911:35 -
Nonstop7h 40m
Tue 22/916:40 -
1 stop10h 15m
Deal found 21/8£369
Thu 10/908:00 -
2 stops14h 20m
Tue 15/918:50 -
1 stop19h 25m
Deal found 21/8£370
Sat 19/906:00 -
1 stop12h 50m
Wed 23/909:30 -
1 stop18h 05m
Deal found 21/8£370
Fri 18/912:40 -
1 stop11h 52m
Fri 25/922:05 -
Nonstop6h 45m
Deal found 19/8£371
Wed 2/907:25 -
1 stop16h 25m
Sat 12/918:40 -
Nonstop6h 50m
Deal found 20/8£371
Tue 8/906:00 -
1 stop12h 50m
Tue 29/922:10 -
Nonstop6h 50m
Deal found 21/8£372
Fri 11/911:35 -
Nonstop7h 40m
Sun 20/922:05 -
Nonstop6h 45m
Deal found 20/8£372
Tue 1/909:30 -
Nonstop7h 30m
Tue 6/1016:40 -
1 stop14h 10m
Deal found 20/8£372
Mon 31/811:35 -
Nonstop7h 40m
Tue 8/916:40 -
1 stop10h 15m
Deal found 19/8£373
Sat 21/1106:50 -
1 stop9h 50m
Sat 28/1113:15 -
1 stop12h 15m
Deal found 18/8£373
Wed 9/911:35 -
Nonstop7h 40m
Tue 22/922:05 -
Nonstop6h 45m
Deal found 21/8£374
Thu 10/908:45 -
1 stop11h 15m
Tue 15/916:40 -
1 stop10h 55m
Deal found 21/8£374

Find flight deals from London to Ontario

Round-trip from

£369

One-way from

£221

Popular in

August

Cheapest in

February

Average price

£600

Good round-trip deal

£392 or less

Good one-way deal

£209 or less
Air Transat
  • Air Transat
  • 14/9-22/9
  • 1 total stop
  • 17h 55m total
  • London to Ontario
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Air Transat
  • Air Transat
  • 28/9
  • 1 total stop
  • 14h 52m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£40 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
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Average for round-trip flights in August 2026
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Price to beat on a round-trip flight from London (LON) to Ontario.
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Price to beat on a one-way flight from London (LON) to Ontario.
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Cheapflights Fare Finder

 
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 London Gatwick - YTZ Toronto Island

LGWYTZ

London Gatwick

Fri 25/9

09:40-18:55

1 stop14h 15m

Toronto Island

Fri 2/10

16:55-07:55

1 stop10h 00m

£391

LondonToronto

LGW London Gatwick - YTZ Toronto Island

LGWYTZ

London Gatwick

Wed 2/9

11:35-20:11

1 stop13h 36m

Toronto Island

Mon 14/9

20:45-07:55

1 stop30h 10m

£392

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Tue 19/1

11:40-15:00

Nonstop8h 20m

Toronto Pearson Intl

Mon 25/1

21:35-09:45

Nonstop7h 10m

£396

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Tue 19/1

11:40-15:00

Nonstop8h 20m

Toronto Pearson Intl

Tue 26/1

21:35-09:45

Nonstop7h 10m

£396

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Wed 16/9

09:40-12:45

Nonstop8h 05m

Toronto Pearson Intl

Thu 24/9

23:15-09:50

1 stop29h 35m

£402

LondonMontreal

LGW London Gatwick - YUL Montreal Pierre Elliott Trudeau Intl

LGWYUL

London Gatwick

Thu 29/10

11:40-22:20

1 stop14h 40m

Montreal Pierre Elliott Trudeau Intl

Sun 8/11

17:25-09:45

1 stop11h 20m

£409

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Wed 16/9

07:30-20:12

2 stops17h 42m

Montreal Pierre Elliott Trudeau Intl

Wed 30/9

15:25-07:15

1 stop10h 50m

£422

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Wed 16/9

07:30-17:19

2 stops14h 49m

Montreal Pierre Elliott Trudeau Intl

Wed 23/9

17:05-10:40

1 stop12h 35m

£422

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Thu 10/9

07:30-17:19

2 stops14h 49m

Montreal Pierre Elliott Trudeau Intl

Sun 13/9

14:20-06:55

1 stop11h 35m

£422

LondonToronto

STN London Stansted - YYZ Toronto Pearson Intl

STNYYZ

London Stansted

Sun 20/9

22:10-11:00

1 stop17h 50m

Toronto Pearson Intl

Wed 30/9

19:15-20:35

1 stop20h 20m

£425

Flights are sorted by cheapest return flights first.

Deals found on 17/8

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

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 £396). Flying from London to Region of Ontario in August is currently the most expensive (average of £612). 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?

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

The most flights from LON to CAON are scheduled on a Friday (42 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (22 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 £430 and £599 in September.
The cheapest return price found within the last 5 days was £388 on Multiple Airlines (8 Sept–20 Sept).

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

Booking 43 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

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
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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
574 reviews
Air Transat
7.8
Good
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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
7.4
Good
695 reviews
Air Transat
7.8
Good
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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
11,519 reviews
Air Transat
7.8
Good
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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
733 reviews
Air Transat
7.8
Good
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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
8,209 reviews
Air Transat
7.8
Good
574 reviews
Check prices

Boarding

8.0

Comfort

7.3

Food

6.8

Entertainment

7.1

Crew

8.5

Overall

7.8

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

  • How long is the flight from London to Region of Ontario?

    Air Transat, United Airlines, and Lufthansa can get you from London to Region of Ontario in just under 8h 10m. Your travel time can differ by up to 9h 32m. There are 3543 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 Icelandair (£144), KLM (£178), and Air Transat (£204).

  • 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 (86%), MEA (86%) and Thai Airways (84%).

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

    The cheapest flight price from London to Region of Ontario is £307. On average you can expect to pay £1,544. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £237.

  • 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 £396). Flying from London to Region of Ontario in August is currently the most expensive (average of £612). 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

Alternative routes for London to Ontario

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
London City to Pearson Intl flights
Stansted to Pearson Intl flights
Heathrow to Calgary flights
London City to Vancouver Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Luton to Pearson Intl flights
Stansted to Vancouver Intl flights
Heathrow to Abbotsford flights
Gatwick to Toronto Island flights
Manchester to Pearson Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Gatwick to Calgary flights
London City to Calgary flights
Stansted to Pierre Elliott Trudeau Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Luton to Vancouver Intl flights
Gatwick to Abbotsford flights
Manchester to Vancouver Intl flights
Southend to Pearson Intl flights
Heathrow to Halifax flights
Manchester to Toronto Island flights
Heathrow to Ottawa flights
Luton to Calgary flights
Stansted to Calgary flights
Edinburgh to Vancouver Intl flights
Edinburgh to Pearson Intl flights
Heathrow to Edmonton flights
Birmingham to Pearson Intl flights
Gatwick to Halifax flights
Heathrow to Comox flights
Birmingham to Vancouver Intl flights
London City to Halifax flights
Manchester to Calgary flights
Heathrow to Winnipeg flights
Gatwick to Ottawa flights
Manchester to Abbotsford flights
Gatwick to Edmonton flights
Heathrow to Victoria flights
London City to Ottawa flights
Newcastle upon Tyne to Vancouver Intl flights
Stansted to St. John's flights
Edinburgh to Toronto Island flights
Heathrow to Kelowna flights

Top 10 airlines flying from London to Ontario

AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£173Average£484FlexibilityNo cancel feeOn-time72%
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ITA AirwaysCheapest£260Average£662FlexibilityNo cancel feeOn-time81%
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IcelandairCheapest£268Average£416FlexibilityNo cancel feeOn-time76%
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Air TransatCheapest£326Average£505FlexibilityNo cancel feeOn-time50%
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TAP AIR PORTUGALCheapest£329Average£548FlexibilityNo cancel feeOn-timeN/A
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Air CanadaCheapest£334Average£577FlexibilityNo cancel feeOn-time67%
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American AirlinesCheapest£343Average£653FlexibilityNo cancel feeOn-time71%
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British AirwaysCheapest£358Average£528FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£358Average£555FlexibilityNo cancel feeOn-timeN/A
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LufthansaCheapest£360Average£543FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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