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

British Airways is the most popular carrier 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.

€421 Cheap Flights from London to Ontario in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from €599 to €679. The lowest price recently found on this route was €582.

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Find the cheapest flights from London to Los Angeles

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:30 - 17:12

LHR

ONT

18h 42m

2 stops

06:00 - 10:00

ONT

LHR

21h 00m

1 stop

€582KLM

Wed, 7 Oct - Fri, 30 Oct

10:45 - 16:12

LHR

ONT

13h 27m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€583Multiple Airlines

Thu, 12 Nov - Mon, 16 Nov

06:20 - 16:24

LHR

ONT

18h 04m

2 stops

06:00 - 10:00

ONT

LHR

20h 00m

1 stop

€587Multiple Airlines

Tue, 3 Nov - Wed, 25 Nov

10:45 - 23:48

LHR

ONT

21h 03m

1 stop

13:00 - 10:00

ONT

LHR

13h 00m

1 stop

€588Delta

Wed, 11 Nov - Tue, 17 Nov

09:20 - 18:09

LHR

ONT

16h 49m

1 stop

07:05 - 06:25

ONT

LHR

15h 20m

1 stop

€589Delta

Fri, 25 Sep - Tue, 6 Oct

12:30 - 22:14

LHR

ONT

17h 44m

1 stop

13:00 - 10:00

ONT

LHR

13h 00m

1 stop

€590Delta

Fri, 11 Dec - Wed, 6 Jan

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

13:04 - 10:00

ONT

LHR

12h 56m

1 stop

€591KLM

Sat, 12 Sep - Sat, 19 Sep

12:55 - 23:46

LHR

ONT

18h 51m

2 stops

06:00 - 07:05

ONT

LHR

17h 05m

2 stops

€593Virgin Atlantic

Tue, 3 Nov - Tue, 10 Nov

10:45 - 16:24

LHR

ONT

13h 39m

1 stop

12:00 - 09:00

ONT

LHR

13h 00m

1 stop

€597Multiple Airlines

Tue, 3 Nov - Wed, 25 Nov

10:55 - 16:35

LHR

ONT

13h 40m

1 stop

13:04 - 10:00

ONT

LHR

12h 56m

1 stop

€597KLM

Sat, 19 Sep - Sat, 26 Sep

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United Airlines flights from London to Ontario

Our best United Airlines deals on London to Ontario flight tickets

United Airlines

3 Sept

LHR08:45London Heathrow

19h 16m

2 stops

ONT20:01Ontario

16 Sept

ONT05:00Ontario

18h 15m

2 stops

LHR07:15London Heathrow

€623

United Airlines

4 Nov

LHR09:30London Heathrow

18h 36m

2 stops

ONT20:06Ontario

26 Nov

ONT13:13Ontario

12h 27m

1 stop

LHR09:40London Heathrow

€628

United Airlines

30 Oct

LHR09:30London Heathrow

20h 23m

2 stops

ONT22:53Ontario

2 Nov

ONT06:46Ontario

17h 09m

1 stop

LHR07:55London Heathrow

€645

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

3 Nov

LHR12:55London Heathrow

18h 51m

2 stops

ONT23:46Ontario

10 Nov

ONT06:00Ontario

17h 05m

2 stops

LHR07:05London Heathrow

€593

Virgin Atlantic

3 Sept

LHR06:30London Heathrow

17h 54m

2 stops

ONT16:24Ontario

16 Sept

ONT09:52Ontario

19h 13m

2 stops

LHR13:05London Heathrow

€604

Virgin Atlantic

3 Sept

LHR13:25London Heathrow

18h 09m

2 stops

ONT23:34Ontario

16 Sept

ONT13:04Ontario

18h 31m

2 stops

LHR15:35London Heathrow

€615

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 7/10

06:30-17:12

2 stops18h 42m

Ontario

Fri 30/10

06:00-10:00

1 stop21h 00m

€582

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 12/11

10:45-16:12

1 stop13h 27m

Ontario

Mon 16/11

12:00-09:00

1 stop13h 00m

€583

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/11

06:20-16:24

2 stops18h 04m

Ontario

Wed 25/11

06:00-10:00

1 stop20h 00m

€587

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/11

10:45-23:48

1 stop21h 03m

Ontario

Tue 17/11

13:00-10:00

1 stop13h 00m

€588

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 25/9

09:20-18:09

1 stop16h 49m

Ontario

Tue 6/10

07:05-06:25

1 stop15h 20m

€589

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/12

12:30-22:14

1 stop17h 44m

Ontario

Wed 6/1

13:00-10:00

1 stop13h 00m

€590

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 12/9

10:55-16:35

1 stop13h 40m

Ontario

Sat 19/9

13:04-10:00

1 stop12h 56m

€591

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/11

12:55-23:46

2 stops18h 51m

Ontario

Tue 10/11

06:00-07:05

2 stops17h 05m

€593

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/11

10:45-16:24

1 stop13h 39m

Ontario

Wed 25/11

12:00-09:00

1 stop13h 00m

€597

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 19/9

10:55-16:35

1 stop13h 40m

Ontario

Sat 26/9

13:04-10:00

1 stop12h 56m

€597

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 March, then you should wait until February to fly from London, when ticket prices are also cheap, with an average price of €366.

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	14h 11m
Direct flights	None

The fastest flight from London to Ontario takes 14h 11m

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

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Frequently asked questions about flying from London to Ontario

How far is London to Ontario by plane?
A flight from London to Ontario will travel around 8718.6 km. Typically, this will take 14h 11m 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.