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

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

What airlines fly to Ontario?

British Airways, American Airlines and Virgin Atlantic 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 56% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 13 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 many operators does momondo search for flights from London to Ontario Airport?

As of June 2026, there is 1 operator available to choose from for flights from London to Ontario Airport.

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.

$443 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 $669 to $879. The lowest price recently found on this route was $443.

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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.

1:40 pm - 9:55 pm

LHR

ONT

16h 15m

1 stop

5:45 am - 7:55 am

ONT

LHR

18h 10m

1 stop

$443United Airlines

Thu, Jul 2 - Fri, Jul 24

9:30 am - 9:55 pm

LHR

ONT

20h 25m

2 stops

6:10 am - 11:55 am

ONT

LHR

21h 45m

1 stop

$561United Airlines

Wed, Jul 8 - Wed, Jul 22

9:30 am - 11:06 pm

LHR

ONT

21h 36m

2 stops

6:02 am - 7:30 am

ONT

LHR

17h 28m

1 stop

$562United Airlines

Fri, Nov 20 - Thu, Dec 3

2:05 pm - 8:53 pm

LHR

ONT

38h 48m

2 stops

5:00 am - 6:30 am

ONT

LHR

17h 30m

2 stops

$586Air Canada

Wed, Sep 9 - Sun, Sep 13

10:00 am - 9:55 pm

LHR

ONT

19h 55m

1 stop

1:18 pm - 9:40 am

ONT

LHR

12h 22m

1 stop

$590Lufthansa

Thu, Jul 2 - Fri, Jul 24

2:10 pm - 8:53 pm

LHR

ONT

38h 43m

2 stops

5:00 am - 6:35 am

ONT

LHR

17h 35m

2 stops

$595Air Canada

Fri, Sep 11 - Mon, Sep 14

6:45 am - 10:32 pm

LCY

ONT

23h 47m

2 stops

10:25 am - 3:15 pm

ONT

LCY

20h 50m

2 stops

$737Multiple Airlines

Mon, Jul 13 - Mon, Jul 20

10:25 am - 10:45 pm

LGW

ONT

20h 20m

2 stops

11:54 am - 4:00 pm

ONT

LGW

20h 06m

2 stops

$752Delta

Thu, Aug 27 - Wed, Sep 9

7:45 am - 4:30 pm

LCY

ONT

16h 45m

2 stops

7:05 am - 8:50 am

ONT

LCY

17h 45m

2 stops

$774Delta

Tue, Jul 14 - Tue, Jul 21

3:40 pm - 10:00 pm

LGW

ONT

38h 20m

2 stops

2:14 pm - 2:40 pm

ONT

LGW

16h 26m

2 stops

$1,052Multiple Airlines

Tue, Sep 15 - Tue, Oct 6

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Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

Jul 14

LHR9:40 amLondon Heathrow

22h 08m

2 stops

ONT11:48 pmOntario

Jul 21

ONT1:00 pmOntario

37h 40m

2 stops

LHR10:40 amLondon Heathrow

$617

Virgin Atlantic

Jul 15

LHR10:55 amLondon Heathrow

20h 53m

1 stop

ONT11:48 pmOntario

Jul 22

ONT1:00 pmOntario

40h 05m

2 stops

LHR1:05 pmLondon Heathrow

$650

Virgin Atlantic

Sep 2

LHR11:45 amLondon Heathrow

18h 38m

2 stops

ONT10:23 pmOntario

Sep 10

ONT5:55 pmOntario

34h 15m

1 stop

LHR12:10 pmLondon Heathrow

$659

United Airlines flights from London to Ontario

Our best United Airlines deals on London to Ontario flight tickets

United Airlines

Jul 2

LHR1:40 pmLondon Heathrow

16h 15m

1 stop

ONT9:55 pmOntario

Jul 24

ONT5:45 amOntario

18h 10m

1 stop

LHR7:55 amLondon Heathrow

$443

United Airlines

Jul 8

LHR9:30 amLondon Heathrow

20h 25m

2 stops

ONT9:55 pmOntario

Jul 22

ONT6:10 amOntario

21h 45m

1 stop

LHR11:55 amLondon Heathrow

$561

United Airlines

Nov 20

LHR9:30 amLondon Heathrow

21h 36m

2 stops

ONT11:06 pmOntario

Dec 3

ONT6:02 amOntario

17h 28m

1 stop

LHR7:30 amLondon Heathrow

$562

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 7/2

1:40 pm-9:55 pm

1 stop16h 15m

Ontario

Fri 7/24

5:45 am-7:55 am

1 stop18h 10m

$443

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 7/8

9:30 am-9:55 pm

2 stops20h 25m

Ontario

Wed 7/22

6:10 am-11:55 am

1 stop21h 45m

$561

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 11/20

9:30 am-11:06 pm

2 stops21h 36m

Ontario

Thu 12/3

6:02 am-7:30 am

1 stop17h 28m

$562

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/9

2:05 pm-8:53 pm

2 stops38h 48m

Ontario

Sun 9/13

5:00 am-6:30 am

2 stops17h 30m

$586

Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 7/2

10:00 am-9:55 pm

1 stop19h 55m

Ontario

Fri 7/24

1:18 pm-9:40 am

1 stop12h 22m

$590

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 9/11

2:10 pm-8:53 pm

2 stops38h 43m

Ontario

Mon 9/14

5:00 am-6:35 am

2 stops17h 35m

$595

LondonOntario

LCY - ONT

LCYONT

London City

Mon 7/13

6:45 am-10:32 pm

2 stops23h 47m

Ontario

Mon 7/20

10:25 am-3:15 pm

2 stops20h 50m

$737

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 8/27

10:25 am-10:45 pm

2 stops20h 20m

Ontario

Wed 9/9

11:54 am-4:00 pm

2 stops20h 06m

$752

LondonOntario

LCY - ONT

LCYONT

London City

Tue 7/14

7:45 am-4:30 pm

2 stops16h 45m

Ontario

Tue 7/21

7:05 am-8:50 am

2 stops17h 45m

$774

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Tue 9/15

3:40 pm-10:00 pm

2 stops38h 20m

Ontario

Tue 10/6

2:14 pm-2:40 pm

2 stops16h 26m

$1,052

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?

What is the cheapest month to fly to Ontario?

In general, March 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 $398. If you aren’t able to travel during the month of March, then book flights to Ontario from London during February instead. Flights to Ontario in February, while not as cheap as those in March, still average around $418.

How far in advance should I book a flight from London 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 $668 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London for as low as $496 on momondo.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 20% 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 29m
Direct flights	None

The fastest flight from London to Ontario takes 13h 29m

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 29m 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 many operators does momondo search for flights from London to Ontario Airport?
As of June 2026, there is 1 operator available to choose from for flights from London to Ontario Airport.
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.

Best airlines flying from London to Ontario

Compare and see reviews for airlines that fly from London to Ontario with momondo

Airline	Rating	Free Cancellation	Price
British Airways	PriceFrom $567	Free Cancellation	Rating 6.7 8,054 reviews		Search British Airways flights

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

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Cheap flights from London to Los Angeles from $443

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from London to Los Angeles departing on 7/2. 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

United Airlines flights from London to Ontario

Our best United Airlines 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?

How far in advance should I book a flight from London 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

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

Fastest flight time

Direct flights

Frequently asked questions about flying from London to Ontario

Best airlines flying from London to Ontario

Compare and see reviews for airlines that fly from London to Ontario with momondo

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.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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