What is the cheapest airline that flies from London to Ontario?

British Airways and United Airlines are the most popular carriers operating from London to Ontario

When did momondo last update prices for flights from London to Ontario Airport?

Prices for flights from London to Ontario Airport were last updated today.

How old do you have to be to fly from London to Ontario Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

€355 Cheap Flights from London to Ontario in 2025/26

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11:45 - 12:02LHR-ONT

32h 17m2 stops

22:20 - 11:40ONT-LHR

29h 20m1 stop

€479Delta

Find Deal

Wed, 18 Feb - Sun, 22 Feb

06:30 - 21:05LHR-ONT

22h 35m2 stops

06:00 - 06:20ONT-LHR

16h 20m2 stops

€481Delta

Find Deal

Fri, 20 Feb - Wed, 25 Feb

11:45 - 12:02LHR-ONT

32h 17m2 stops

22:20 - 09:00ONT-LHR

26h 40m1 stop

€482Delta

Find Deal

Wed, 18 Feb - Sun, 22 Feb

11:45 - 22:33LHR-ONT

42h 48m2 stops

22:30 - 06:25ONT-LHR

23h 55m1 stop

€483Delta

Find Deal

Tue, 23 Dec - Mon, 9 Feb

10:00 - 22:37LHR-ONT

44h 37m2 stops

07:30 - 10:30ONT-LHR

19h 00m1 stop

€484Virgin Atlantic

Find Deal

Wed, 18 Feb - Sun, 22 Feb

11:45 - 22:33LHR-ONT

42h 48m2 stops

13:10 - 10:00ONT-LHR

12h 50m1 stop

€485Delta

Find Deal

Tue, 23 Dec - Fri, 6 Feb

08:40 - 10:00LHR-ONT

33h 20m2 stops

12:00 - 06:30ONT-LHR

34h 30m1 stop

€492Delta

Find Deal

Wed, 31 Dec - Wed, 29 Jul

11:45 - 22:33LHR-ONT

42h 48m2 stops

12:41 - 06:50ONT-LHR

34h 09m2 stops

€493Delta

Find Deal

Tue, 23 Dec - Tue, 6 Jan

09:55 - 22:40LHR-ONT

20h 45m2 stops

07:00 - 09:00ONT-LHR

18h 00m1 stop

€496Delta

Find Deal

Fri, 1 May - Sun, 10 May

10:45 - 22:33LHR-ONT

19h 48m1 stop

13:10 - 10:00ONT-LHR

12h 50m1 stop

€497Delta

Find Deal

Wed, 24 Dec - Tue, 10 Feb

Delta flights from London to Ontario

Our best Delta deals on London to Ontario flight tickets

Delta

18 Feb

LHR11:45London Heathrow

32h 17m

2 stops

ONT12:02Ontario

22 Feb

ONT22:20Ontario

29h 20m

1 stop

LHR11:40London Heathrow

€479

Find similar

Delta

20 Feb

LHR06:30London Heathrow

22h 35m

2 stops

ONT21:05Ontario

25 Feb

ONT06:00Ontario

16h 20m

2 stops

LHR06:20London Heathrow

€481

Find similar

Delta

18 Feb

LHR11:45London Heathrow

32h 17m

2 stops

ONT12:02Ontario

22 Feb

ONT22:20Ontario

26h 40m

1 stop

LHR09:00London Heathrow

€482

Find similar

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

18 Feb

LHR10:00London Heathrow

44h 37m

2 stops

ONT22:37Ontario

22 Feb

ONT07:30Ontario

19h 00m

1 stop

LHR10:30London Heathrow

€484

Find similar

Virgin Atlantic

1 May

LHR11:20London Heathrow

19h 20m

1 stop

ONT22:40Ontario

17 May

ONT14:00Ontario

16h 15m

1 stop

LHR14:15London Heathrow

€511

Find similar

Virgin Atlantic

28 Mar

LHR11:20London Heathrow

17h 28m

2 stops

ONT21:48Ontario

11 Apr

ONT13:20Ontario

16h 55m

2 stops

LHR14:15London Heathrow

€524

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/2

11:45-12:02

2 stops32h 17m

Ontario

Sun 22/2

22:20-11:40

1 stop29h 20m

€479

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/2

06:30-21:05

2 stops22h 35m

Ontario

Wed 25/2

06:00-06:20

2 stops16h 20m

€481

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/2

11:45-12:02

2 stops32h 17m

Ontario

Sun 22/2

22:20-09:00

1 stop26h 40m

€482

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 23/12

11:45-22:33

2 stops42h 48m

Ontario

Mon 9/2

22:30-06:25

1 stop23h 55m

€483

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/2

10:00-22:37

2 stops44h 37m

Ontario

Sun 22/2

07:30-10:30

1 stop19h 00m

€484

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 23/12

11:45-22:33

2 stops42h 48m

Ontario

Fri 6/2

13:10-10:00

1 stop12h 50m

€485

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 31/12

08:40-10:00

2 stops33h 20m

Ontario

Wed 29/7

12:00-06:30

1 stop34h 30m

€492

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 23/12

11:45-22:33

2 stops42h 48m

Ontario

Tue 6/1

12:41-06:50

2 stops34h 09m

€493

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 1/5

09:55-22:40

2 stops20h 45m

Ontario

Sun 10/5

07:00-09:00

1 stop18h 00m

€496

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 24/12

10:45-22:33

1 stop19h 48m

Ontario

Tue 10/2

13:10-10:00

1 stop12h 50m

€497

Flights are sorted by cheapest return flights first.

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How to get the cheapest flight ticket from London to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Ontario?

If you don’t want to visit Ontario in January, then you should wait until September to fly from London, when ticket prices are also cheap, with an average price of €476.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around €622 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London for as low as €454 on momondo.

When to book flights from London to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London to Ontario (LON to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ontario

Fastest flight time	31h 15m
Direct flights	None

The fastest flight from London to Ontario takes 31h 15m

There are no direct flights from London to Ontario. There are no popular flight routes from London to Ontario.

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How far is London to Ontario by plane?
A flight from London to Ontario will travel around 8718.6 km. Typically, this will take 13h 34m by plane in normal conditions.
When did momondo last update prices for flights from London to Ontario Airport?
Prices for flights from London to Ontario Airport were last updated today.
How old do you have to be to fly from London to Ontario Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from London.

Can I find flights from London to Ontario with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from London.

I’m not ready to book a flight from London to Ontario right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from London and alert you when they change.