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Cheap flights from the United Kingdom to Los Angeles from $490

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 10/1. 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

British Airways Logo
8:20 am - 10:33 pmLHR-ONT
22h 13m1 stop
British Airways Logo
12:47 pm - 12:45 pmONT-LHR
15h 58m1 stop
$542British Airways
Find Deal
Sat, Sep 13 - Sat, Sep 20
British Airways Logo
2:55 pm - 10:42 pmLHR-ONT
14h 47m1 stop
British Airways Logo
4:47 pm - 1:15 pmONT-LHR
12h 28m1 stop
$545British Airways
Find Deal
Tue, Oct 28 - Tue, Nov 4
American Airlines Logo
10:40 am - 9:39 pmLGW-ONT
18h 59m2 stops
American Airlines Logo
7:16 pm - 8:10 amONT-LGW
28h 54m2 stops
$548American Airlines
Find Deal
Fri, Aug 29 - Thu, Sep 11
Virgin Atlantic Logo
6:20 am - 4:14 pmLHR-ONT
17h 54m2 stops
Virgin Atlantic Logo
7:00 am - 10:35 amONT-LHR
19h 35m1 stop
$553Virgin Atlantic
Find Deal
Sun, Nov 23 - Sat, Dec 6
American Airlines Logo
12:00 pm - 6:25 pmLHR-ONT
14h 25m1 stop
American Airlines Logo
4:45 pm - 12:50 pmONT-LHR
12h 05m1 stop
$567American Airlines
Find Deal
Sun, Aug 24 - Tue, Sep 9
Delta Logo
6:30 am - 10:23 pmLHR-ONT
23h 53m2 stops
Delta Logo
7:05 am - 1:30 pmONT-LHR
22h 25m1 stop
$573Delta
Find Deal
Sun, Sep 14 - Sun, Sep 21
Virgin Atlantic Logo
8:40 am - 10:42 pmLCY-ONT
22h 02m2 stops
Virgin Atlantic Logo
11:55 am - 4:40 pmONT-LCY
20h 45m2 stops
$593Virgin Atlantic
Find Deal
Wed, Sep 10 - Thu, Sep 25
Delta Logo
6:30 am - 5:11 pmLHR-ONT
18h 41m2 stops
Delta Logo
7:05 am - 10:15 amONT-LHR
19h 10m2 stops
$620Delta
Find Deal
Sat, Aug 30 - Fri, Sep 5
United Airlines Logo
6:05 am - 10:30 pmMAN-ONT
24h 25m2 stops
United Airlines Logo
7:00 am - 10:25 amONT-MAN
19h 25m3 stops
$798United Airlines
Find Deal
Mon, Sep 1 - Mon, Sep 15
United Airlines Logo
6:00 am - 8:44 pmBHX-ONT
21h 44m2 stops
United Airlines Logo
7:00 am - 8:10 amONT-BHX
17h 10m2 stops
$816United Airlines
Find Deal
Thu, Oct 30 - Tue, Nov 11

British Airways flights from United Kingdom to Ontario

Our best British Airways deals on United Kingdom 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 United Kingdom to Ontario

Our best American Airlines deals on United Kingdom 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

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 July 31, 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

LHR - ONT

LHRONT

London Heathrow

Sat 9/13

8:20 am-10:33 pm

1 stop22h 13m

Ontario

Sat 9/20

12:47 pm-12:45 pm

1 stop15h 58m

$542

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 10/28

2:55 pm-10:42 pm

1 stop14h 47m

Ontario

Tue 11/4

4:47 pm-1:15 pm

1 stop12h 28m

$545

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Fri 8/29

10:40 am-9:39 pm

2 stops18h 59m

Ontario

Thu 9/11

7:16 pm-8:10 am

2 stops28h 54m

$548

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 11/23

6:20 am-4:14 pm

2 stops17h 54m

Ontario

Sat 12/6

7:00 am-10:35 am

1 stop19h 35m

$553

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 8/24

12:00 pm-6:25 pm

1 stop14h 25m

Ontario

Tue 9/9

4:45 pm-12:50 pm

1 stop12h 05m

$567

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 9/14

6:30 am-10:23 pm

2 stops23h 53m

Ontario

Sun 9/21

7:05 am-1:30 pm

1 stop22h 25m

$573

LondonOntario

LCY - ONT

LCYONT

London City

Wed 9/10

8:40 am-10:42 pm

2 stops22h 02m

Ontario

Thu 9/25

11:55 am-4:40 pm

2 stops20h 45m

$593

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 8/30

6:30 am-5:11 pm

2 stops18h 41m

Ontario

Fri 9/5

7:05 am-10:15 am

2 stops19h 10m

$620

ManchesterOntario

MAN - ONT

MANONT

Manchester

Mon 9/1

6:05 am-10:30 pm

2 stops24h 25m

Ontario

Mon 9/15

7:00 am-10:25 am

3 stops19h 25m

$798

BirminghamOntario

BHX - ONT

BHXONT

Birmingham

Thu 10/30

6:00 am-8:44 pm

2 stops21h 44m

Ontario

Tue 11/11

7:00 am-8:10 am

2 stops17h 10m

$816

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 $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 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 $709 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 $589 on momondo.

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

You could potentially save up to 40% 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

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 United Kingdom in the past 72 hours is $490. The best round-trip flight deal from United Kingdom to Ontario found on momondo in the last 72 hours is $542.
The fastest flight from United Kingdom to Ontario takes 13h 53m
There are no direct flights from United Kingdom 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)
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  • 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
8,900 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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