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Cheap flights from the United Kingdom to Los Angeles from $336

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Los Angeles departing on 10/31. 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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Find the cheapest flights from the United Kingdom to Los Angeles

Recent round-trip flight deals from the United Kingdom to Los Angeles

American Airlines Logo
12:30 pm - 8:24 pmLGW-ONT
39h 54m2 stops
American Airlines Logo
6:47 am - 9:00 amONT-LGW
18h 13m2 stops
$490American Airlines
Find Deal
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
12:30 pm - 9:31 amLGW-ONT
29h 01m2 stops
American Airlines Logo
8:04 pm - 7:30 amONT-LGW
27h 26m2 stops
$491American Airlines
Find Deal
Thu, Feb 26 - Mon, Mar 2
Virgin Atlantic Logo
8:25 pm - 10:41 pmLHR-ONT
33h 16m2 stops
Virgin Atlantic Logo
7:05 am - 9:00 amONT-LHR
17h 55m1 stop
$493Virgin Atlantic
Find Deal
Wed, Oct 29 - Wed, Nov 5
Virgin Atlantic Logo
12:20 pm - 10:41 pmLHR-ONT
17h 21m1 stop
Virgin Atlantic Logo
7:05 am - 7:50 amONT-LHR
16h 45m1 stop
$511Virgin Atlantic
Find Deal
Wed, Oct 29 - Wed, Nov 5
British Airways Logo
3:00 pm - 10:02 pmLHR-ONT
15h 02m1 stop
British Airways Logo
5:03 pm - 1:15 pmONT-LHR
12h 12m1 stop
$514British Airways
Find Deal
Sat, Feb 7 - Sat, Feb 21
British Airways Logo
10:05 am - 10:18 pmLHR-ONT
19h 13m1 stop
British Airways Logo
2:59 pm - 11:40 amONT-LHR
12h 41m1 stop
$532British Airways
Find Deal
Thu, Oct 30 - Thu, Nov 6
Delta Logo
6:30 am - 7:19 pmLHR-ONT
19h 49m2 stops
Delta Logo
6:00 am - 8:45 amONT-LHR
18h 45m2 stops
$538Delta
Find Deal
Thu, Oct 30 - Thu, Nov 6
Delta Logo
6:30 am - 5:09 pmLHR-ONT
18h 39m2 stops
Delta Logo
6:00 am - 10:30 amONT-LHR
20h 30m2 stops
$553Delta
Find Deal
Sat, Nov 22 - Sat, Nov 29
United Airlines Logo
9:05 am - 10:31 pmBHX-ONT
20h 26m2 stops
United Airlines Logo
7:00 am - 12:45 pmONT-BHX
21h 45m2 stops
$789United Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5
United Airlines Logo
6:00 am - 10:51 pmMAN-ONT
23h 51m2 stops
United Airlines Logo
7:00 am - 8:40 amONT-MAN
17h 40m2 stops
$802United Airlines
Find Deal
Wed, Oct 29 - Wed, Nov 5

American Airlines flights from United Kingdom to Ontario

Our best American Airlines deals on United Kingdom to Ontario flight tickets
American Airlines
Feb 26
LGW12:30 pmLondon Gatwick
39h 54m
2 stops
ONT8:24 pmOntario
Mar 2
ONT6:47 amOntario
18h 13m
2 stops
LGW9:00 amLondon Gatwick
$490
Find similar
American Airlines
Feb 26
LGW12:30 pmLondon Gatwick
29h 01m
2 stops
ONT9:31 amOntario
Mar 2
ONT8:04 pmOntario
27h 26m
2 stops
LGW7:30 amLondon Gatwick
$491
Find similar
American Airlines
Oct 1
LGW12:20 pmLondon Gatwick
40h 51m
2 stops
ONT9:11 pmOntario
Oct 5
ONT11:59 pmOntario
24h 11m
2 stops
LGW8:10 amLondon Gatwick
$515
Find similar

Virgin Atlantic flights from United Kingdom to Ontario

Our best Virgin Atlantic deals on United Kingdom to Ontario flight tickets
Virgin Atlantic
Oct 29
LHR8:25 pmLondon Heathrow
33h 16m
2 stops
ONT10:41 pmOntario
Nov 5
ONT7:05 amOntario
17h 55m
1 stop
LHR9:00 amLondon Heathrow
$493
Find similar
Virgin Atlantic
Oct 29
LHR12:20 pmLondon Heathrow
17h 21m
1 stop
ONT10:41 pmOntario
Nov 5
ONT7:05 amOntario
16h 45m
1 stop
LHR7:50 amLondon Heathrow
$511
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

momondo Fare Finder

 
Customize your flight search to find flights from United Kingdom to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from the United Kingdom to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 2/26

12:30 pm-8:24 pm

2 stops39h 54m

Ontario

Mon 3/2

6:47 am-9:00 am

2 stops18h 13m

$490

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Thu 2/26

12:30 pm-9:31 am

2 stops29h 01m

Ontario

Mon 3/2

8:04 pm-7:30 am

2 stops27h 26m

$491

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 10/29

8:25 pm-10:41 pm

2 stops33h 16m

Ontario

Wed 11/5

7:05 am-9:00 am

1 stop17h 55m

$493

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 10/29

12:20 pm-10:41 pm

1 stop17h 21m

Ontario

Wed 11/5

7:05 am-7:50 am

1 stop16h 45m

$511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 2/7

3:00 pm-10:02 pm

1 stop15h 02m

Ontario

Sat 2/21

5:03 pm-1:15 pm

1 stop12h 12m

$514

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 10/30

10:05 am-10:18 pm

1 stop19h 13m

Ontario

Thu 11/6

2:59 pm-11:40 am

1 stop12h 41m

$532

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 10/30

6:30 am-7:19 pm

2 stops19h 49m

Ontario

Thu 11/6

6:00 am-8:45 am

2 stops18h 45m

$538

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 11/22

6:30 am-5:09 pm

2 stops18h 39m

Ontario

Sat 11/29

6:00 am-10:30 am

2 stops20h 30m

$553

BirminghamOntario

BHX - ONT

BHXONT

Birmingham

Wed 10/29

9:05 am-10:31 pm

2 stops20h 26m

Ontario

Wed 11/5

7:00 am-12:45 pm

2 stops21h 45m

$789

ManchesterOntario

MAN - ONT

MANONT

Manchester

Wed 10/29

6:00 am-10:51 pm

2 stops23h 51m

Ontario

Wed 11/5

7:00 am-8:40 am

2 stops17h 40m

$802

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from United Kingdom 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

What is the cheapest month to fly to Ontario?

In general, February is the cheapest month to fly from United Kingdom 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 United Kingdom 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 United Kingdom 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 United Kingdom 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 United Kingdom 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 United Kingdom 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 United Kingdom for as low as $583 on momondo.

Can stopping save me money on United Kingdom to Ontario flights?

You could potentially save up to 41% on your flight if you consider stops on a United Kingdom to Ontario flight.

Cheap United Kingdom to Ontario flight deals and tips

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

Direct flights

None
There are no direct flights from United Kingdom to Ontario. There are no popular flight routes from United Kingdom to Ontario.
Search flight deals

  • When did momondo last update prices for flights from United Kingdom to Ontario Airport?

    Prices for flights from United Kingdom to Ontario Airport refresh daily.

  • How many operators does momondo search for flights from United Kingdom to Ontario Airport?

  • How old do you have to be to fly from United Kingdom to Ontario Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United Kingdom to Ontario Airport.

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

    The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from United Kingdom to Ontario

Compare and see reviews for airlines that fly from United Kingdom to Ontario with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $560Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from United Kingdom to Ontario?

It is quick and easy to find United Kingdom to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

Can I find flights from United Kingdom to Ontario with flexible booking policies on momondo?

momondo does allow users to show only those flights to Ontario from United Kingdom which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from United Kingdom 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 United Kingdom.

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

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

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