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

Alaska Airlines, United Airlines, and JetBlue 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.

€410 Cheap Flights from London to Ontario in 2026

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.

09:30 - 20:20

LHR

ONT

18h 50m

2 stops

13:18 - 07:25

ONT

LHR

34h 07m

1 stop

€528United Airlines

Fri, 11 Dec - Sun, 27 Dec

06:35 - 20:51

LHR

ONT

22h 16m

2 stops

13:29 - 21:20

ONT

LHR

23h 51m

2 stops

€532United Airlines

Wed, 18 Nov - Thu, 19 Nov

06:35 - 20:51

LHR

ONT

22h 16m

2 stops

13:29 - 09:40

ONT

LHR

12h 11m

1 stop

€533United Airlines

Wed, 18 Nov - Sat, 21 Nov

09:30 - 20:15

LHR

ONT

18h 45m

2 stops

13:29 - 21:20

ONT

LHR

23h 51m

2 stops

€534United Airlines

Wed, 18 Nov - Thu, 19 Nov

06:35 - 20:56

LHR

ONT

22h 21m

2 stops

06:00 - 21:20

ONT

LHR

31h 20m

2 stops

€535United Airlines

Wed, 18 Nov - Thu, 19 Nov

07:25 - 18:16

LHR

ONT

18h 51m

2 stops

09:01 - 07:25

ONT

LHR

14h 24m

1 stop

€536United Airlines

Wed, 9 Sep - Wed, 16 Sep

09:30 - 21:59

LHR

ONT

20h 29m

2 stops

13:18 - 09:40

ONT

LHR

12h 22m

1 stop

€536United Airlines

Thu, 17 Sep - Mon, 21 Sep

09:30 - 21:59

LHR

ONT

20h 29m

2 stops

05:00 - 11:55

ONT

LHR

22h 55m

2 stops

€537United Airlines

Thu, 17 Sep - Mon, 21 Sep

06:55 - 20:53

LHR

ONT

21h 58m

2 stops

07:00 - 06:45

ONT

LHR

15h 45m

1 stop

€539United Airlines

Thu, 20 Aug - Fri, 4 Sep

10:35 - 18:16

LHR

ONT

15h 41m

1 stop

08:03 - 07:25

ONT

LHR

15h 22m

1 stop

€555United Airlines

Wed, 23 Sep - Tue, 29 Sep

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

3 Sept

LHR11:45London Heathrow

19h 00m

2 stops

ONT22:45Ontario

24 Sept

ONT18:00Ontario

13h 35m

1 stop

LHR15:35London Heathrow

€563

Virgin Atlantic

13 Jan

LHR10:45London Heathrow

13h 27m

1 stop

ONT16:12Ontario

17 Jan

ONT12:00Ontario

15h 40m

1 stop

LHR11:40London Heathrow

€582

Virgin Atlantic

13 Jan

LHR08:55London Heathrow

21h 48m

2 stops

ONT22:43Ontario

17 Jan

ONT07:00Ontario

15h 25m

1 stop

LHR06:25London Heathrow

€586

United Airlines flights from London to Ontario

Our best United Airlines deals on London to Ontario flight tickets

United Airlines

11 Dec

LHR09:30London Heathrow

18h 50m

2 stops

ONT20:20Ontario

27 Dec

ONT13:18Ontario

34h 07m

1 stop

LHR07:25London Heathrow

€528

United Airlines

18 Nov

LHR06:35London Heathrow

22h 16m

2 stops

ONT20:51Ontario

19 Nov

ONT13:29Ontario

23h 51m

2 stops

LHR21:20London Heathrow

€532

United Airlines

18 Nov

LHR06:35London Heathrow

22h 16m

2 stops

ONT20:51Ontario

21 Nov

ONT13:29Ontario

12h 11m

1 stop

LHR09:40London Heathrow

€533

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/12

09:30-20:20

2 stops18h 50m

Ontario

Sun 27/12

13:18-07:25

1 stop34h 07m

€528

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

06:35-20:51

2 stops22h 16m

Ontario

Thu 19/11

13:29-21:20

2 stops23h 51m

€532

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

06:35-20:51

2 stops22h 16m

Ontario

Sat 21/11

13:29-09:40

1 stop12h 11m

€533

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

09:30-20:15

2 stops18h 45m

Ontario

Thu 19/11

13:29-21:20

2 stops23h 51m

€534

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 18/11

06:35-20:56

2 stops22h 21m

Ontario

Thu 19/11

06:00-21:20

2 stops31h 20m

€535

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/9

07:25-18:16

2 stops18h 51m

Ontario

Wed 16/9

09:01-07:25

1 stop14h 24m

€536

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 17/9

09:30-21:59

2 stops20h 29m

Ontario

Mon 21/9

13:18-09:40

1 stop12h 22m

€536

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 17/9

09:30-21:59

2 stops20h 29m

Ontario

Mon 21/9

05:00-11:55

2 stops22h 55m

€537

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 20/8

06:55-20:53

2 stops21h 58m

Ontario

Fri 4/9

07:00-06:45

1 stop15h 45m

€539

Fastest return journey

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 23/9

10:35-18:16

1 stop15h 41m

Ontario

Tue 29/9

08:03-07:25

1 stop15h 22m

€555

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?

Prices are currently typical for flights on this route.

Typical prices usually range from €473 to €652.
The lowest price recently found on this route was €528.

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 €501.

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	27h 05m
Direct flights	None

The fastest flight from London to Ontario takes 27h 05m

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

Search flight deals

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 27h 05m 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.