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

United Airlines, Virgin Atlantic, and British Airways 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.

€362 Cheap Flights from London to Ontario in 2025/26

Q: What is the typical price of a round-trip flight between London and Ontario?

Prices are currently typical for flights on this route. Typical prices usually range from €439 to €720. The lowest price recently found on this route was €465.

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Find the cheapest flights from London to Los Angeles

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One-way

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Enter your travel dates to find the best prices.

11:05 - 21:52LHR-ONT

17h 47m2 stops

06:00 - 08:55ONT-LHR

18h 55m2 stops

€465Delta

Find Deal

Sat, 28 Mar - Sat, 11 Apr

10:45 - 21:07LHR-ONT

18h 22m1 stop

15:30 - 12:50ONT-LHR

13h 20m1 stop

€469Delta

Find Deal

Thu, 26 Feb - Mon, 2 Mar

11:05 - 21:52LHR-ONT

17h 47m2 stops

11:55 - 14:15ONT-LHR

18h 20m1 stop

€471Virgin Atlantic

Find Deal

Sat, 28 Mar - Sat, 11 Apr

06:30 - 21:07LHR-ONT

22h 37m2 stops

15:30 - 12:50ONT-LHR

13h 20m1 stop

€471Delta

Find Deal

Thu, 26 Feb - Mon, 2 Mar

14:45 - 22:38LHR-ONT

14h 53m1 stop

13:00 - 09:50ONT-LHR

12h 50m1 stop

€472KLM

Find Deal

Thu, 26 Mar - Sat, 11 Apr

11:20 - 17:15LHR-ONT

13h 55m1 stop

13:00 - 09:50ONT-LHR

12h 50m1 stop

€479KLM

Find Deal

Thu, 9 Apr - Tue, 21 Apr

10:05 - 17:37LHR-ONT

15h 32m1 stop

13:24 - 09:40ONT-LHR

12h 16m1 stop

€564United Airlines

Find Deal

Mon, 8 Dec - Thu, 22 Jan

10:05 - 17:51LHR-ONT

15h 46m1 stop

13:24 - 09:40ONT-LHR

12h 16m1 stop

€570United Airlines

Find Deal

Tue, 13 Jan - Wed, 28 Jan

07:30 - 22:28LHR-ONT

22h 58m2 stops

07:00 - 06:50ONT-LHR

15h 50m1 stop

€577British Airways

Find Deal

Sat, 6 Dec - Wed, 10 Dec

11:45 - 19:39LHR-ONT

15h 54m1 stop

12:46 - 10:00ONT-LHR

13h 14m1 stop

€584British Airways

Find Deal

Wed, 3 Dec - Thu, 11 Dec

Delta flights from London to Ontario

Our best Delta deals on London to Ontario flight tickets

Delta

28 Mar

LHR11:05London Heathrow

17h 47m

2 stops

ONT21:52Ontario

11 Apr

ONT06:00Ontario

18h 55m

2 stops

LHR08:55London Heathrow

€465

Find similar

Delta

26 Feb

LHR10:45London Heathrow

18h 22m

1 stop

ONT21:07Ontario

2 Mar

ONT15:30Ontario

13h 20m

1 stop

LHR12:50London Heathrow

€469

Find similar

Delta

28 Mar

LHR11:05London Heathrow

17h 47m

2 stops

ONT21:52Ontario

11 Apr

ONT06:00Ontario

18h 55m

2 stops

LHR08:55London Heathrow

€471

Find similar

United Airlines flights from London to Ontario

Our best United Airlines deals on London to Ontario flight tickets

United Airlines

8 Dec

LHR10:05London Heathrow

15h 32m

1 stop

ONT17:37Ontario

22 Jan

ONT13:24Ontario

12h 16m

1 stop

LHR09:40London Heathrow

€564

Find similar

United Airlines

13 Jan

LHR10:05London Heathrow

15h 46m

1 stop

ONT17:51Ontario

28 Jan

ONT13:24Ontario

12h 16m

1 stop

LHR09:40London Heathrow

€570

Find similar

United Airlines

9 Dec

LHR06:30London Heathrow

24h 19m

3 stops

ONT22:49Ontario

17 Dec

ONT05:05Ontario

18h 50m

2 stops

LHR07:55London Heathrow

€574

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 28/3

11:05-21:52

2 stops17h 47m

Ontario

Sat 11/4

06:00-08:55

2 stops18h 55m

€465

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

10:45-21:07

1 stop18h 22m

Ontario

Mon 2/3

15:30-12:50

1 stop13h 20m

€469

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 28/3

11:05-21:52

2 stops17h 47m

Ontario

Sat 11/4

11:55-14:15

1 stop18h 20m

€471

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

06:30-21:07

2 stops22h 37m

Ontario

Mon 2/3

15:30-12:50

1 stop13h 20m

€471

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/3

14:45-22:38

1 stop14h 53m

Ontario

Sat 11/4

13:00-09:50

1 stop12h 50m

€472

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/4

11:20-17:15

1 stop13h 55m

Ontario

Tue 21/4

13:00-09:50

1 stop12h 50m

€479

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/12

10:05-17:37

1 stop15h 32m

Ontario

Thu 22/1

13:24-09:40

1 stop12h 16m

€564

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 13/1

10:05-17:51

1 stop15h 46m

Ontario

Wed 28/1

13:24-09:40

1 stop12h 16m

€570

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 6/12

07:30-22:28

2 stops22h 58m

Ontario

Wed 10/12

07:00-06:50

1 stop15h 50m

€577

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/12

11:45-19:39

1 stop15h 54m

Ontario

Thu 11/12

12:46-10:00

1 stop13h 14m

€584

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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 typical price of a round-trip flight between London and Ontario?

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 €477.

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 €642 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 €470 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

Direct flights	None

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

Search flight deals

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 19m 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.