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

What airlines fly to Ontario?

British Airways, Virgin Atlantic and American Airlines are the top three most popular airlines that fly to Ontario from London according to our data. British Airways is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 12 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from London to Ontario Airport are updated daily.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ontario Airport.

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

The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$370 Cheap Flights from London to Ontario in 2026

Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

9:30 am - 8:20 pm

LHR

ONT

18h 50m

2 stops

1:18 pm - 7:25 am

ONT

LHR

34h 07m

1 stop

$601United Airlines

Fri, Dec 11 - Sun, Dec 27

9:00 am - 8:15 pm

LHR

ONT

19h 15m

2 stops

6:00 am - 7:40 am

ONT

LHR

17h 40m

1 stop

$602United Airlines

Wed, Nov 18 - Thu, Nov 19

8:40 am - 8:01 pm

LHR

ONT

19h 21m

2 stops

7:00 am - 8:30 am

ONT

LHR

17h 30m

1 stop

$604United Airlines

Fri, Aug 28 - Thu, Sep 10

8:40 am - 8:01 pm

LHR

ONT

19h 21m

2 stops

1:56 pm - 2:10 pm

ONT

LHR

16h 14m

1 stop

$605United Airlines

Wed, Sep 16 - Mon, Sep 21

8:40 am - 8:01 pm

LHR

ONT

19h 21m

2 stops

5:00 am - 12:35 pm

ONT

LHR

23h 35m

1 stop

$606United Airlines

Mon, Aug 24 - Sun, Sep 6

8:40 am - 8:01 pm

LHR

ONT

19h 21m

2 stops

5:00 am - 9:40 am

ONT

LHR

20h 40m

1 stop

$606United Airlines

Wed, Sep 16 - Wed, Sep 30

8:45 am - 8:01 pm

LHR

ONT

19h 16m

2 stops

7:00 am - 6:55 am

ONT

LHR

15h 55m

2 stops

$606United Airlines

Sat, Aug 29 - Sat, Sep 5

6:35 am - 8:51 pm

LHR

ONT

22h 16m

2 stops

1:29 pm - 9:40 am

ONT

LHR

12h 11m

1 stop

$607United Airlines

Wed, Nov 18 - Sat, Nov 21

7:30 am - 8:51 pm

LHR

ONT

21h 21m

2 stops

6:00 am - 7:40 am

ONT

LHR

17h 40m

1 stop

$608United Airlines

Wed, Nov 18 - Thu, Nov 19

10:55 am - 4:35 pm

LHR

ONT

13h 40m

1 stop

6:20 am - 3:35 pm

ONT

LHR

25h 15m

1 stop

$615Virgin Atlantic

Sat, Sep 26 - Wed, Sep 30

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Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

Sep 26

LHR10:55 amLondon Heathrow

13h 40m

1 stop

ONT4:35 pmOntario

Sep 30

ONT6:20 amOntario

25h 15m

1 stop

LHR3:35 pmLondon Heathrow

$615

Virgin Atlantic

Oct 29

LHR12:20 pmLondon Heathrow

17h 23m

1 stop

ONT10:43 pmOntario

Nov 4

ONT1:24 pmOntario

12h 36m

1 stop

LHR10:00 amLondon Heathrow

$621

Virgin Atlantic

Nov 20

LHR12:20 pmLondon Heathrow

18h 40m

1 stop

ONT11:00 pmOntario

Nov 27

ONT1:25 pmOntario

12h 35m

1 stop

LHR10:00 amLondon Heathrow

$628

KLM flights from London to Ontario

Our best KLM deals on London to Ontario flight tickets

KLM

Sep 10

LHR10:55 amLondon Heathrow

13h 40m

1 stop

ONT4:35 pmOntario

Sep 23

ONT1:04 pmOntario

12h 56m

1 stop

LHR10:00 amLondon Heathrow

$623

KLM

Aug 15

LHR10:55 amLondon Heathrow

13h 29m

1 stop

ONT4:24 pmOntario

Aug 22

ONT1:06 pmOntario

12h 54m

1 stop

LHR10:00 amLondon Heathrow

$782

KLM

Aug 5

LCY10:00 amLondon City

21h 34m

2 stops

ONT11:34 pmOntario

Aug 9

ONT5:05 pmOntario

16h 15m

2 stops

LCY5:20 pmLondon City

$1,164

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 12/11

9:30 am-8:20 pm

2 stops18h 50m

Ontario

Sun 12/27

1:18 pm-7:25 am

1 stop34h 07m

$601

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

9:00 am-8:15 pm

2 stops19h 15m

Ontario

Thu 11/19

6:00 am-7:40 am

1 stop17h 40m

$602

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 8/28

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Thu 9/10

7:00 am-8:30 am

1 stop17h 30m

$604

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/16

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Mon 9/21

1:56 pm-2:10 pm

1 stop16h 14m

$605

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/24

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Sun 9/6

5:00 am-12:35 pm

1 stop23h 35m

$606

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/16

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Wed 9/30

5:00 am-9:40 am

1 stop20h 40m

$606

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 8/29

8:45 am-8:01 pm

2 stops19h 16m

Ontario

Sat 9/5

7:00 am-6:55 am

2 stops15h 55m

$606

Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

6:35 am-8:51 pm

2 stops22h 16m

Ontario

Sat 11/21

1:29 pm-9:40 am

1 stop12h 11m

$607

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

7:30 am-8:51 pm

2 stops21h 21m

Ontario

Thu 11/19

6:00 am-7:40 am

1 stop17h 40m

$608

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 9/26

10:55 am-4:35 pm

1 stop13h 40m

Ontario

Wed 9/30

6:20 am-3:35 pm

1 stop25h 15m

$615

Flights are sorted by cheapest round-trip 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 $539 to $743.
The lowest price recently found on this route was $601.

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from London to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $553. If you aren’t able to travel during the month of January, then book flights to Ontario from London during September instead. Flights to Ontario in September, while not as cheap as those in January, still average around $571.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 19% on your flight if you consider stops on a London to Ontario flight.

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 round-trip 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	13h 45m
Direct flights	None

The fastest flight from London to Ontario takes 13h 45m

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?
The distance between London and Ontario is about 5417.5 mi. Typically, this will take 13h 45m 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 are updated daily.
How old do you have to be to fly from London to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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?

momondo provides multiple filters to help you find the best flight to Ontario from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of London to Ontario flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from London to Los Angeles from $370

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Los Angeles departing on 1/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

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Our best KLM deals on London to Ontario flight tickets

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How to get the cheapest flight ticket from London to Ontario

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

What is the cheapest month to fly to Ontario?

Can stopping save me money on London to Ontario flights?

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

What airlines fly to Ontario?

When to book flights from London to Ontario

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

Fastest flight time

Direct flights

Frequently asked questions about flying from London to Ontario

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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