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

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

What airlines fly to Ontario?

British Airways, American Airlines and Delta 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 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 September 2025, 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.

$336 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 low for flights on this route. Typical prices usually range from $538 to $621. The lowest price recently found on this route was $490.

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Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

12:30 pm - 1:44 pmLGW-ONT

33h 14m2 stops

8:04 pm - 7:30 amONT-LGW

27h 26m2 stops

$490American Airlines

Find Deal

jue., feb. 26 - lun., mar. 2

8:25 pm - 10:41 pmLHR-ONT

33h 16m2 stops

6:00 am - 7:05 amONT-LHR

17h 05m2 stops

$493Virgin Atlantic

Find Deal

mié., oct. 29 - mié., nov. 5

10:45 am - 9:20 pmLHR-ONT

17h 35m1 stop

11:48 am - 10:30 amONT-LHR

14h 42m1 stop

$510Virgin Atlantic

Find Deal

mar., oct. 28 - mar., nov. 4

3:00 pm - 10:02 pmLHR-ONT

15h 02m1 stop

5:03 pm - 1:15 pmONT-LHR

12h 12m1 stop

$511British Airways

Find Deal

sáb., ene. 24 - mar., feb. 3

3:00 pm - 10:02 pmLHR-ONT

15h 02m1 stop

5:03 pm - 1:15 pmONT-LHR

12h 12m1 stop

$514British Airways

Find Deal

sáb., feb. 7 - sáb., feb. 21

6:30 am - 7:19 pmLHR-ONT

19h 49m2 stops

6:00 am - 8:45 amONT-LHR

18h 45m2 stops

$538Delta

Find Deal

jue., oct. 30 - jue., nov. 6

6:30 am - 5:09 pmLHR-ONT

18h 39m2 stops

6:00 am - 10:30 amONT-LHR

20h 30m2 stops

$553Delta

Find Deal

sáb., nov. 22 - sáb., nov. 29

11:45 am - 7:41 pmLHR-ONT

15h 56m1 stop

10:47 am - 8:35 amONT-LHR

13h 48m1 stop

$559Finnair

Find Deal

lun., nov. 10 - lun., nov. 17

3:05 pm - 6:52 pmLGW-ONT

35h 47m2 stops

6:10 am - 8:10 amONT-LGW

18h 00m2 stops

$576

Find Deal

vie., oct. 10 - mié., oct. 22

3:05 pm - 6:52 pmLGW-ONT

35h 47m2 stops

6:10 am - 8:10 amONT-LGW

18h 00m2 stops

$660

Find Deal

vie., oct. 10 - mié., oct. 22

Virgin Atlantic flights from London to Ontario

Our best Virgin Atlantic deals on London to Ontario flight tickets

Virgin Atlantic

Oct 29

LHR8:25 pmLondon Heathrow

33h 16m

2 stops

ONT10:41 pmOntario

Nov 5

ONT6:00 amOntario

17h 05m

2 stops

LHR7:05 amLondon Heathrow

$493

Find similar

Virgin Atlantic

Oct 28

LHR10:45 amLondon Heathrow

17h 35m

1 stop

ONT9:20 pmOntario

Nov 4

ONT11:48 amOntario

14h 42m

1 stop

LHR10:30 amLondon Heathrow

$510

Find similar

Virgin Atlantic

Oct 30

LHR2:45 pmLondon Heathrow

14h 56m

1 stop

ONT10:41 pmOntario

Nov 6

ONT7:35 amOntario

21h 15m

1 stop

LHR12:50 pmLondon Heathrow

$512

Find similar

Delta flights from London to Ontario

Our best Delta deals on London to Ontario flight tickets

Delta

Oct 30

LHR6:30 amLondon Heathrow

19h 49m

2 stops

ONT7:19 pmOntario

Nov 6

ONT6:00 amOntario

18h 45m

2 stops

LHR8:45 amLondon Heathrow

$538

Find similar

Delta

Nov 22

LHR6:30 amLondon Heathrow

18h 39m

2 stops

ONT5:09 pmOntario

Nov 29

ONT6:00 amOntario

20h 30m

2 stops

LHR10:30 amLondon Heathrow

$553

Find similar

Delta

Nov 15

LHR3:05 pmLondon Heathrow

15h 50m

1 stop

ONT10:55 pmOntario

Nov 25

ONT1:20 pmOntario

12h 40m

1 stop

LHR10:00 amLondon Heathrow

$556

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

jue. 2/26

12:30 pm-1:44 pm

2 stops33h 14m

Ontario

lun. 3/2

8:04 pm-7:30 am

2 stops27h 26m

$490

LondonOntario

LHR - ONT

LHRONT

London Heathrow

mié. 10/29

8:25 pm-10:41 pm

2 stops33h 16m

Ontario

mié. 11/5

6:00 am-7:05 am

2 stops17h 05m

$493

LondonOntario

LHR - ONT

LHRONT

London Heathrow

mar. 10/28

10:45 am-9:20 pm

1 stop17h 35m

Ontario

mar. 11/4

11:48 am-10:30 am

1 stop14h 42m

$510

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 1/24

3:00 pm-10:02 pm

1 stop15h 02m

Ontario

mar. 2/3

5:03 pm-1:15 pm

1 stop12h 12m

$511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 2/7

3:00 pm-10:02 pm

1 stop15h 02m

Ontario

sáb. 2/21

5:03 pm-1:15 pm

1 stop12h 12m

$514

LondonOntario

LHR - ONT

LHRONT

London Heathrow

jue. 10/30

6:30 am-7:19 pm

2 stops19h 49m

Ontario

jue. 11/6

6:00 am-8:45 am

2 stops18h 45m

$538

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 11/22

6:30 am-5:09 pm

2 stops18h 39m

Ontario

sáb. 11/29

6:00 am-10:30 am

2 stops20h 30m

$553

LondonOntario

LHR - ONT

LHRONT

London Heathrow

lun. 11/10

11:45 am-7:41 pm

1 stop15h 56m

Ontario

lun. 11/17

10:47 am-8:35 am

1 stop13h 48m

$559

LondonOntario

LGW - ONT

LGWONT

London Gatwick

vie. 10/10

3:05 pm-6:52 pm

2 stops35h 47m

Ontario

mié. 10/22

6:10 am-8:10 am

2 stops18h 00m

$576

LondonOntario

LGW - ONT

LGWONT

London Gatwick

vie. 10/10

3:05 pm-6:52 pm

2 stops35h 47m

Ontario

mié. 10/22

6:10 am-8:10 am

2 stops18h 00m

$660

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, February 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 $546. If you aren’t able to travel during the month of February, then book flights to Ontario from London during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $557.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $602. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from London to Ontario for around $991.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from London to Ontario when you can find flight prices for as low as $602. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $814 on average. Flights to Ontario from London at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $717 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 $583 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 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

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?
The distance between London and Ontario is about 5417.5 mi. Typically, this will take 13h 34m 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 September 2025, 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
United Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 8,929 reviews		Search United Airlines 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.