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Cheap flights from London to Ontario from £226

LON — YYZ
28 Sep — 5 Oct1
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

Tue 22/906:00 -
1 stop12h 50m
Tue 29/918:40 -
Nonstop6h 50m
Deal found 25/8£374
Tue 6/1019:30 -
1 stop23h 20m
Sun 18/1020:40 -
1 stop11h 10m
Deal found 26/8£374
Wed 4/1106:50 -
1 stop9h 50m
Sun 8/1119:10 -
Nonstop7h 00m
Deal found 26/8£375
Fri 23/1009:15 -
1 stop11h 45m
Mon 2/1116:40 -
1 stop19h 25m
Deal found 27/8£376
Fri 30/1012:15 -
1 stop29h 25m
Sun 8/1120:10 -
1 stop14h 45m
Deal found 28/8£376
Sat 19/909:30 -
Nonstop7h 30m
Mon 21/916:35 -
1 stop10h 05m
Deal found 27/8£376
Fri 23/1009:15 -
2 stops15h 06m
Mon 2/1117:10 -
2 stops14h 40m
Deal found 27/8£377
Mon 7/906:00 -
1 stop12h 50m
Sun 25/1020:10 -
Nonstop7h 00m
Deal found 28/8£377
Thu 24/1209:00 -
1 stop14h 43m
Mon 11/116:40 -
1 stop15h 20m
Deal found 28/8£377
Fri 25/1209:00 -
2 stops16h 53m
Thu 7/119:10 -
Nonstop7h 00m
Deal found 28/8£378
Sun 6/906:00 -
1 stop12h 50m
Wed 16/922:10 -
Nonstop6h 50m
Deal found 27/8£379
Sat 3/1015:20 -
1 stop11h 46m
Sun 18/1015:25 -
1 stop10h 50m
Deal found 25/8£380

Find flight deals from London to Ontario

Round-trip from

£373

One-way from

£226

Popular in

August

Cheapest in

February

Average price

£604

Good round-trip deal

£394 or less

Good one-way deal

£210 or less
Air Canada
  • Air Canada
  • 7/9-14/9
  • 2 total stops
  • 27h 40m total
  • London to Ontario
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5/9
  • 5/9
  • 1 total stop
  • 23h 35m total
  • London to Ontario
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Highest demand for flights based on searches. 10% potential increase in price (£41 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£9 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

LondonMontreal

LCY London City - YUL Montreal Pierre Elliott Trudeau Intl

LCYYUL

London City

Fri 23/10

09:15-19:21

2 stops15h 06m

Montreal Pierre Elliott Trudeau Intl

Mon 2/11

17:10-12:50

2 stops14h 40m

£377

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Wed 14/10

10:50-22:06

2 stops16h 16m

Montreal Pierre Elliott Trudeau Intl

Thu 29/10

18:25-10:50

1 stop12h 25m

£391

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Fri 11/12

12:50-15:55

Nonstop8h 05m

Toronto Pearson Intl

Wed 16/12

22:20-10:25

Nonstop7h 05m

£396

LondonToronto

LHR London Heathrow - YYZ Toronto Pearson Intl

LHRYYZ

London Heathrow

Fri 25/12

17:15-20:15

Nonstop8h 00m

Toronto Pearson Intl

Sun 17/1

18:05-06:15

Nonstop7h 10m

£397

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Thu 22/10

11:05-11:23

2 stops53h 18m

Montreal Pierre Elliott Trudeau Intl

Sun 25/10

07:00-21:20

1 stop10h 20m

£397

LondonMontreal

LHR London Heathrow - YUL Montreal Pierre Elliott Trudeau Intl

LHRYUL

London Heathrow

Fri 23/10

11:05-17:23

2 stops35h 18m

Montreal Pierre Elliott Trudeau Intl

Sun 25/10

15:00-16:20

2 stops21h 20m

£397

LondonToronto

LGW London Gatwick - YTZ Toronto Island

LGWYTZ

London Gatwick

Tue 22/9

09:40-16:30

1 stop11h 50m

Toronto Island

Tue 6/10

16:55-09:50

1 stop11h 55m

£397

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Thu 12/11

10:00-16:10

1 stop11h 10m

Toronto Pearson Intl

Tue 24/11

06:00-09:00

2 stops22h 00m

£402

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Tue 8/9

12:40-15:40

Nonstop8h 00m

Toronto Pearson Intl

Mon 21/9

19:50-07:55

Nonstop7h 05m

£402

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Tue 20/10

10:35-22:56

2 stops17h 21m

Toronto Pearson Intl

Mon 26/10

23:20-15:45

1 stop12h 25m

£402

Flights are sorted by cheapest return flights first.

Deals found on 28/8

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 £399). Flying from London to Region of Ontario in August is currently the most expensive (average of £607). 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 Thursday (44 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (28 on average).

How much does it cost for a return flight from London to Region of Ontario?

Airfare is typical for this route at the moment.
London to Region of Ontario flights typically cost between £380 and £499 in September.
The cheapest return price found within the last 5 days was £395 on Air Canada (15 Sept–15 Oct).

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
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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
576 reviews
Air Transat
7.8
Good
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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
11,554 reviews
Air Transat
7.8
Good
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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
740 reviews
Air Transat
7.8
Good
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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
8,229 reviews
Air Transat
7.8
Good
576 reviews
Check prices

Entertainment

7.1

Boarding

8.0

Crew

8.5

Comfort

7.3

Food

6.8

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?

    SWISS, United Airlines, and British Airways can get you from London to Region of Ontario in just under 8h 05m. Your travel time can differ by up to 8h 11m. 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 (£145), KLM (£179), and Air Transat (£206).

  • 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 £305. On average you can expect to pay £1,516. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £180.

  • 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 £399). Flying from London to Region of Ontario in August is currently the most expensive (average of £607). 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
Heathrow to Pierre Elliott Trudeau Intl flights
London City to Pearson Intl flights
Heathrow to Toronto Island flights
Gatwick to Vancouver Intl flights
Heathrow to Calgary flights
Stansted to Pearson Intl flights
London City to Vancouver Intl flights
Luton to Pearson Intl flights
Stansted to Vancouver Intl flights
Gatwick to Pierre Elliott Trudeau Intl flights
Manchester to Pearson Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Heathrow to Abbotsford flights
London City to Pierre Elliott Trudeau Intl flights
Gatwick to Toronto Island flights
Heathrow to Halifax flights
Gatwick to Calgary flights
Luton to Pierre Elliott Trudeau Intl flights
London City to Calgary flights
Luton to Vancouver Intl flights
Manchester to Vancouver Intl flights
Manchester to Toronto Island flights
Southend to Pearson Intl flights
Luton to Calgary flights
Edinburgh to Pearson Intl flights
Stansted to Calgary flights
Heathrow to Ottawa flights
Gatwick to Abbotsford flights
Gatwick to Halifax flights
Heathrow to Winnipeg flights
Edinburgh to Vancouver Intl flights
Manchester to Calgary flights
London City to Ottawa flights
Stansted to Halifax flights
Gatwick to Winnipeg flights
London City to Halifax flights
Heathrow to Edmonton flights
Birmingham to Vancouver Intl flights
Birmingham to Pearson Intl flights
Gatwick to Edmonton flights
Edinburgh to Toronto Island flights
Gatwick to Ottawa flights
Luton to Halifax flights
Heathrow to Kelowna flights
Gatwick to Québec City flights
Heathrow to Québec City flights

Top 10 airlines flying from London to Ontario

AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest£174Average£486FlexibilityNo cancel feeOn-time72%
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ITA AirwaysCheapest£261Average£666FlexibilityNo cancel feeOn-time81%
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IcelandairCheapest£269Average£419FlexibilityNo cancel feeOn-time76%
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Air CanadaCheapest£316Average£553FlexibilityNo cancel feeOn-time67%
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Air TransatCheapest£328Average£505FlexibilityNo cancel feeOn-time50%
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TAP AIR PORTUGALCheapest£331Average£553FlexibilityNo cancel feeOn-timeN/A
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American AirlinesCheapest£345Average£688FlexibilityNo cancel feeOn-time71%
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Air FranceCheapest£352Average£511FlexibilityNo cancel feeOn-time77%
Search Air France flights
WestJetCheapest£357Average£549FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Aer LingusCheapest£360Average£558FlexibilityNo cancel feeOn-timeN/A
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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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