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Cheap flights from London to Ontario from £233

LON — YYZ
25 Oct — 1 Nov1
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

Wed 21/1008:30 -
Nonstop7h 45m
Wed 28/1006:15 -
1 stop10h 45m
Deal found 23/9£362
Tue 13/1011:05 -
2 stops39h 25m
Mon 2/1120:55 -
2 stops29h 15m
Deal found 23/9£362
Wed 21/1011:35 -
1 stop13h 36m
Thu 22/1020:45 -
1 stop30h 10m
Deal found 23/9£363
Fri 2/1014:05 -
1 stop12h 48m
Thu 15/1018:35 -
Nonstop7h 00m
Deal found 24/9£363
Thu 5/1111:40 -
Nonstop8h 20m
Sat 21/1121:35 -
Nonstop7h 10m
Deal found 23/9£363
Tue 1/1207:45 -
2 stops15h 30m
Mon 7/1219:40 -
2 stops17h 20m
Deal found 25/9£364
Sun 8/1118:40 -
2 stops42h 12m
Sun 15/1109:45 -
2 stops17h 05m
Deal found 22/9£364
Thu 8/1006:50 -
1 stop10h 00m
Sun 11/1006:40 -
1 stop9h 20m
Deal found 23/9£364
Tue 17/1111:40 -
Nonstop8h 20m
Tue 24/1121:35 -
Nonstop7h 10m
Deal found 22/9£364
Thu 5/1113:25 -
1 stop13h 10m
Wed 11/1110:45 -
1 stop15h 25m
Deal found 22/9£364
Sun 15/1108:40 -
2 stops14h 11m
Sat 21/1110:45 -
2 stops16h 05m
Deal found 22/9£364
Wed 7/1017:55 -
1 stop22h 55m
Fri 23/1006:40 -
1 stop9h 20m
Deal found 23/9£364

Find flight deals from London to Ontario

Round-trip from

£362

One-way from

£233

Popular in

August

Cheapest in

February

Average price

£441

Good round-trip deal

£389 or less

Good one-way deal

£226 or less
Air Canada
  • Air Canada
  • 7/3-15/3
  • 1 total stop
  • 19h 50m total
  • London to Ontario
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Air Transat
  • Air Transat
  • 27/9-31/12
  • Nonstop
  • 8h 00m total
  • London to Ontario
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£43 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 September 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

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Mon 5/10

12:40-00:25

1 stop16h 45m

Ottawa

Wed 31/12

00:00-06:00

Nonstop0h 00m

£234

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Fri 9/10

09:40-12:40

Nonstop8h 00m

Ottawa

Wed 31/12

00:00-06:00

Nonstop0h 00m

£234

LondonOttawa

LGW London Gatwick - YOW Ottawa

LGWYOW

London Gatwick

Sun 4/10

09:40-12:40

Nonstop8h 00m

Ottawa

Wed 31/12

00:00-06:00

Nonstop0h 00m

£240

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Thu 3/12

11:40-15:00

Nonstop8h 20m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£262

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Sat 5/12

11:40-15:00

Nonstop8h 20m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£263

LondonToronto

LTN London Luton - YYZ Toronto Pearson Intl

LTNYYZ

London Luton

Thu 3/12

16:10-12:10

1 stop25h 00m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£268

LondonToronto

LTN London Luton - YYZ Toronto Pearson Intl

LTNYYZ

London Luton

Sun 15/11

18:40-14:05

1 stop24h 25m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£271

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Sun 8/11

18:30-14:05

1 stop24h 35m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£271

LondonToronto

LTN London Luton - YYZ Toronto Pearson Intl

LTNYYZ

London Luton

Sun 8/11

18:40-14:05

1 stop24h 25m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£274

LondonToronto

LGW London Gatwick - YYZ Toronto Pearson Intl

LGWYYZ

London Gatwick

Wed 25/11

11:55-18:15

1 stop11h 20m

Toronto Pearson Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£277

Flights are sorted by cheapest return flights first.

Deals found on 21/9

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 £414). Flying from London to Region of Ontario in August is currently the most expensive (average of £625). 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 Wednesday (38 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 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 £402 and £553 in March.
The cheapest return price found within the last 5 days was £362 on Air Canada (7 Mar–14 Mar).

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
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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
7.7
Good
581 reviews
Air Transat
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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
694 reviews
Air Transat
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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
11,682 reviews
Air Transat
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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
751 reviews
Air Transat
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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
8,236 reviews
Air Transat
7.7
Good
581 reviews
Check prices

Overall

7.7

Crew

8.5

Food

6.8

Entertainment

7.1

Boarding

8.0

Comfort

7.3

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?

    Delta, Air Canada, and Lufthansa can get you from London to Region of Ontario in just under 7h 50m. Your travel time can differ by up to 18h 59m. 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 (£149), KLM (£184), and Air Transat (£211).

  • 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 MEA (94%), Singapore Airlines (93%) and SriLankan Airlines (88%).

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

    The cheapest flight price from London to Region of Ontario is £321. On average you can expect to pay £1,491. The most popular route, (London Heathrow - Toronto Pearson Intl), can usually be booked for £268.

  • 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 £414). Flying from London to Region of Ontario in August is currently the most expensive (average of £625). 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 Pearson Intl flights
Heathrow to Vancouver Intl flights
Gatwick to Pearson Intl flights
Heathrow to Toronto Island flights
London City to Pearson Intl flights
Stansted to Pearson Intl flights
Heathrow to Calgary flights
Luton to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Stansted to Vancouver Intl flights
London City to Vancouver Intl flights
Gatwick to Toronto Island flights
Luton to Vancouver Intl flights
Heathrow to Abbotsford flights
London City to Calgary flights
Gatwick to Calgary flights
Manchester to Pearson Intl flights
Luton to Calgary flights
Gatwick to Pierre Elliott Trudeau Intl flights
London City to Pierre Elliott Trudeau Intl flights
Stansted to Pierre Elliott Trudeau Intl flights
Heathrow to Halifax flights
Heathrow to Ottawa flights
Stansted to Calgary flights
Manchester to Vancouver Intl flights
Luton to Pierre Elliott Trudeau Intl flights
Edinburgh to Pearson Intl flights
Manchester to Toronto Island flights
Gatwick to Ottawa flights
Manchester to Abbotsford flights
Heathrow to St. John's flights
Southend to Pearson Intl flights
Heathrow to Edmonton flights
Edinburgh to Toronto Island flights
Gatwick to Halifax flights
Manchester to Calgary flights
Stansted to Halifax flights
Gatwick to St. John's flights
London City to Ottawa flights
London City to Halifax flights
Gatwick to Abbotsford flights
Gatwick to Edmonton flights
Heathrow to Winnipeg flights
Manchester to Halifax flights
Edinburgh to Vancouver Intl flights
Birmingham to Pearson Intl flights
London City to Edmonton flights

Top 10 airlines flying from London to Ontario

AirlineCheapestAverageFlexibilityOn-time
ITA AirwaysCheapest£268Average£683FlexibilityNo cancel feeOn-time81%
Search ITA Airways flights
IcelandairCheapest£276Average£421FlexibilityNo cancel feeOn-time76%
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Air CanadaCheapest£324Average£596FlexibilityNo cancel feeOn-time67%
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Air TransatCheapest£338Average£519FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapest£339Average£567FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Virgin AtlanticCheapest£344Average£561FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£353Average£715FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapest£364Average£570FlexibilityNo cancel feeOn-time76%
Search Finnair flights
WestJetCheapest£366Average£563FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Aer LingusCheapest£368Average£560FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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