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

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

What airlines fly to Ontario?

British Airways, Delta 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 49% 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 July 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.

$490 Cheap Flights from London to Ontario in 2025

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 $770 to $1,188. The lowest price recently found on this route was $542.

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Find the cheapest flights from London to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

8:20 am - 10:33 pmLHR-ONT

22h 13m1 stop

12:47 pm - 12:45 pmONT-LHR

15h 58m1 stop

$542British Airways

Find Deal

sáb., sep. 13 - sáb., sep. 20

2:55 pm - 10:42 pmLHR-ONT

14h 47m1 stop

4:47 pm - 1:15 pmONT-LHR

12h 28m1 stop

$545British Airways

Find Deal

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

10:40 am - 9:39 pmLGW-ONT

18h 59m2 stops

7:16 pm - 8:10 amONT-LGW

28h 54m2 stops

$548American Airlines

Find Deal

vie., ago. 29 - jue., sep. 11

6:20 am - 4:14 pmLHR-ONT

17h 54m2 stops

7:00 am - 10:35 amONT-LHR

19h 35m1 stop

$553Virgin Atlantic

Find Deal

dom., nov. 23 - sáb., dic. 6

12:00 pm - 6:25 pmLHR-ONT

14h 25m1 stop

4:45 pm - 12:50 pmONT-LHR

12h 05m1 stop

$567American Airlines

Find Deal

dom., ago. 24 - mar., sep. 9

6:30 am - 10:23 pmLHR-ONT

23h 53m2 stops

7:05 am - 1:30 pmONT-LHR

22h 25m1 stop

$573Delta

Find Deal

dom., sep. 14 - dom., sep. 21

7:35 am - 6:54 pmLHR-ONT

19h 19m2 stops

12:47 pm - 10:50 amONT-LHR

14h 03m1 stop

$578Iberia

Find Deal

sáb., oct. 4 - sáb., oct. 18

7:35 am - 10:33 pmLHR-ONT

22h 58m2 stops

10:53 am - 2:25 pmONT-LHR

19h 32m1 stop

$579Iberia

Find Deal

sáb., sep. 13 - sáb., sep. 20

8:40 am - 10:42 pmLCY-ONT

22h 02m2 stops

11:55 am - 4:40 pmONT-LCY

20h 45m2 stops

$593Virgin Atlantic

Find Deal

mié., sep. 10 - jue., sep. 25

6:30 am - 5:11 pmLHR-ONT

18h 41m2 stops

7:05 am - 10:15 amONT-LHR

19h 10m2 stops

$620Delta

Find Deal

sáb., ago. 30 - vie., sep. 5

British Airways flights from London to Ontario

Our best British Airways deals on London to Ontario flight tickets

British Airways

Sep 13

LHR8:20 amLondon Heathrow

22h 13m

1 stop

ONT10:33 pmOntario

Sep 20

ONT12:47 pmOntario

15h 58m

1 stop

LHR12:45 pmLondon Heathrow

$542

Find similar

British Airways

Oct 28

LHR2:55 pmLondon Heathrow

14h 47m

1 stop

ONT10:42 pmOntario

Nov 4

ONT4:47 pmOntario

12h 28m

1 stop

LHR1:15 pmLondon Heathrow

$545

Find similar

British Airways

Sep 20

LHR7:35 amLondon Heathrow

19h 19m

2 stops

ONT6:54 pmOntario

Sep 27

ONT2:54 pmOntario

13h 51m

1 stop

LHR12:45 pmLondon Heathrow

$547

Find similar

American Airlines flights from London to Ontario

Our best American Airlines deals on London to Ontario flight tickets

American Airlines

Aug 29

LGW10:40 amLondon Gatwick

18h 59m

2 stops

ONT9:39 pmOntario

Sep 11

ONT7:16 pmOntario

28h 54m

2 stops

LGW8:10 amLondon Gatwick

$548

Find similar

American Airlines

Aug 24

LHR12:00 pmLondon Heathrow

14h 25m

1 stop

ONT6:25 pmOntario

Sep 9

ONT4:45 pmOntario

12h 05m

1 stop

LHR12:50 pmLondon Heathrow

$567

Find similar

American Airlines

Sep 8

LHR3:40 pmLondon Heathrow

14h 08m

1 stop

ONT9:48 pmOntario

Sep 21

ONT4:45 pmOntario

12h 05m

1 stop

LHR12:50 pmLondon Heathrow

$570

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 9/13

8:20 am-10:33 pm

1 stop22h 13m

Ontario

sáb. 9/20

12:47 pm-12:45 pm

1 stop15h 58m

$542

LondonOntario

LHR - ONT

LHRONT

London Heathrow

mar. 10/28

2:55 pm-10:42 pm

1 stop14h 47m

Ontario

mar. 11/4

4:47 pm-1:15 pm

1 stop12h 28m

$545

LondonOntario

LGW - ONT

LGWONT

London Gatwick

vie. 8/29

10:40 am-9:39 pm

2 stops18h 59m

Ontario

jue. 9/11

7:16 pm-8:10 am

2 stops28h 54m

$548

LondonOntario

LHR - ONT

LHRONT

London Heathrow

dom. 11/23

6:20 am-4:14 pm

2 stops17h 54m

Ontario

sáb. 12/6

7:00 am-10:35 am

1 stop19h 35m

$553

LondonOntario

LHR - ONT

LHRONT

London Heathrow

dom. 8/24

12:00 pm-6:25 pm

1 stop14h 25m

Ontario

mar. 9/9

4:45 pm-12:50 pm

1 stop12h 05m

$567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

dom. 9/14

6:30 am-10:23 pm

2 stops23h 53m

Ontario

dom. 9/21

7:05 am-1:30 pm

1 stop22h 25m

$573

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 10/4

7:35 am-6:54 pm

2 stops19h 19m

Ontario

sáb. 10/18

12:47 pm-10:50 am

1 stop14h 03m

$578

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 9/13

7:35 am-10:33 pm

2 stops22h 58m

Ontario

sáb. 9/20

10:53 am-2:25 pm

1 stop19h 32m

$579

LondonOntario

LCY - ONT

LCYONT

London City

mié. 9/10

8:40 am-10:42 pm

2 stops22h 02m

Ontario

jue. 9/25

11:55 am-4:40 pm

2 stops20h 45m

$593

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb. 8/30

6:30 am-5:11 pm

2 stops18h 41m

Ontario

vie. 9/5

7:05 am-10:15 am

2 stops19h 10m

$620

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 $559.

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 $709 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 $589 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

Best Price Found	$490
Fastest flight time	13h 53m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from London in the past 72 hours is $490. The best round-trip flight deal from London to Ontario found on momondo in the last 72 hours is $542.

The fastest flight from London to Ontario takes 13h 53m

There are no direct flights from London to Ontario. Popular non-direct routes for this connection are London City Airport - Ontario Airport, London Heathrow Airport - Ontario Airport and London Gatwick Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

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 53m 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 July 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 8,900 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.