Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from the United Kingdom to Los Angeles from $436

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 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from the United Kingdom to Los Angeles

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

Enter your travel dates to find the best prices.
British Airways Logo
10:05 am - 4:22 pm
LHR
-
ONT
14h 17m
1 stop
British Airways Logo
10:59 am - 8:05 am
ONT
-
LHR
13h 06m
1 stop
$511British Airways
Tue, Apr 21 - Tue, Apr 28
British Airways Logo
10:05 am - 4:22 pm
LHR
-
ONT
14h 17m
1 stop
British Airways Logo
10:59 am - 8:05 am
ONT
-
LHR
13h 06m
1 stop
$512British Airways
Mon, Apr 6 - Thu, Apr 16
British Airways Logo
10:05 am - 4:22 pm
LHR
-
ONT
14h 17m
1 stop
British Airways Logo
10:59 am - 8:05 am
ONT
-
LHR
13h 06m
1 stop
$516British Airways
Thu, Apr 16 - Tue, Apr 21
Iberia Logo
6:10 am - 8:54 pm
LHR
-
ONT
22h 44m
2 stops
Iberia Logo
10:59 am - 8:05 am
ONT
-
LHR
13h 06m
1 stop
$530Iberia
Tue, Apr 14 - Tue, Apr 21
Iberia Logo
6:10 am - 8:54 pm
LHR
-
ONT
22h 44m
2 stops
Iberia Logo
2:08 pm - 2:25 pm
ONT
-
LHR
16h 17m
1 stop
$531Iberia
Tue, Apr 14 - Tue, Apr 21
Delta Logo
10:45 am - 11:51 pm
LHR
-
ONT
21h 06m
2 stops
Delta Logo
11:59 am - 3:35 pm
ONT
-
LHR
19h 36m
1 stop
$534Delta
Mon, Mar 30 - Mon, Apr 6
Virgin Atlantic Logo
10:55 am - 4:28 pm
LHR
-
ONT
13h 33m
1 stop
Virgin Atlantic Logo
5:50 pm - 3:35 pm
ONT
-
LHR
13h 45m
1 stop
$536Virgin Atlantic
Tue, Mar 31 - Fri, May 29
Delta Logo
10:25 am - 9:00 pm
LGW
-
ONT
18h 35m
2 stops
Delta Logo
1:35 pm - 4:00 pm
ONT
-
LGW
18h 25m
2 stops
$777Delta
Mon, Apr 27 - Sat, May 9
United Airlines Logo
9:40 am - 9:50 pm
EDI
-
ONT
20h 10m
2 stops
United Airlines Logo
6:05 am - 10:35 am
ONT
-
EDI
20h 30m
2 stops
$793United Airlines
Tue, Apr 14 - Tue, Apr 21
United Airlines Logo
9:40 am - 9:50 pm
EDI
-
ONT
20h 10m
2 stops
United Airlines Logo
6:05 am - 10:35 am
ONT
-
EDI
20h 30m
2 stops
$794United Airlines
Wed, Apr 15 - Wed, Apr 22

Virgin Atlantic flights from United Kingdom to Ontario

Our best Virgin Atlantic deals on United Kingdom to Ontario flight tickets
Virgin Atlantic
Mar 31
LHR10:55 amLondon Heathrow
13h 33m
1 stop
ONT4:28 pmOntario
May 29
ONT5:50 pmOntario
13h 45m
1 stop
LHR3:35 pmLondon Heathrow
$536
Virgin Atlantic
Apr 1
LHR10:55 amLondon Heathrow
13h 33m
1 stop
ONT4:28 pmOntario
Apr 14
ONT1:29 pmOntario
13h 31m
1 stop
LHR11:00 amLondon Heathrow
$539
Virgin Atlantic
Mar 31
LHR10:55 amLondon Heathrow
13h 33m
1 stop
ONT4:28 pmOntario
Apr 6
ONT1:20 pmOntario
12h 40m
1 stop
LHR10:00 amLondon Heathrow
$542

British Airways flights from United Kingdom to Ontario

Our best British Airways deals on United Kingdom to Ontario flight tickets
British Airways
Apr 21
LHR10:05 amLondon Heathrow
14h 17m
1 stop
ONT4:22 pmOntario
Apr 28
ONT10:59 amOntario
13h 06m
1 stop
LHR8:05 amLondon Heathrow
$511
British Airways
Apr 6
LHR10:05 amLondon Heathrow
14h 17m
1 stop
ONT4:22 pmOntario
Apr 16
ONT10:59 amOntario
13h 06m
1 stop
LHR8:05 amLondon Heathrow
$512
British Airways
Apr 16
LHR10:05 amLondon Heathrow
14h 17m
1 stop
ONT4:22 pmOntario
Apr 21
ONT10:59 amOntario
13h 06m
1 stop
LHR8:05 amLondon Heathrow
$516

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 March 2, 2026.
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

Tue 4/21

10:05 am-4:22 pm

1 stop14h 17m

Ontario

Tue 4/28

10:59 am-8:05 am

1 stop13h 06m

$511

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 4/6

10:05 am-4:22 pm

1 stop14h 17m

Ontario

Thu 4/16

10:59 am-8:05 am

1 stop13h 06m

$512

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 4/16

10:05 am-4:22 pm

1 stop14h 17m

Ontario

Tue 4/21

10:59 am-8:05 am

1 stop13h 06m

$516

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 4/14

6:10 am-8:54 pm

2 stops22h 44m

Ontario

Tue 4/21

10:59 am-8:05 am

1 stop13h 06m

$530

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 4/14

6:10 am-8:54 pm

2 stops22h 44m

Ontario

Tue 4/21

2:08 pm-2:25 pm

1 stop16h 17m

$531

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 3/30

10:45 am-11:51 pm

2 stops21h 06m

Ontario

Mon 4/6

11:59 am-3:35 pm

1 stop19h 36m

$534

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/31

10:55 am-4:28 pm

1 stop13h 33m

Ontario

Fri 5/29

5:50 pm-3:35 pm

1 stop13h 45m

$536

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Mon 4/27

10:25 am-9:00 pm

2 stops18h 35m

Ontario

Sat 5/9

1:35 pm-4:00 pm

2 stops18h 25m

$777

EdinburghOntario

EDI - ONT

EDIONT

Edinburgh Turnhouse

Tue 4/14

9:40 am-9:50 pm

2 stops20h 10m

Ontario

Tue 4/21

6:05 am-10:35 am

2 stops20h 30m

$793

EdinburghOntario

EDI - ONT

EDIONT

Edinburgh Turnhouse

Wed 4/15

9:40 am-9:50 pm

2 stops20h 10m

Ontario

Wed 4/22

6:05 am-10:35 am

2 stops20h 30m

$794

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

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, September 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 $547. If you aren’t able to travel during the month of September, then book flights to Ontario from United Kingdom during February instead. Flights to Ontario in February, while not as cheap as those in September, still average around $558.

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 $677 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 $527 on momondo.

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

You could potentially save up to 18% 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

Fastest flight time

13h 19m

Direct flights

None
The fastest flight from United Kingdom to Ontario takes 13h 19m
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 $497Free CancellationRating
7.4
9,375 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.

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 4/1
Wed 4/8
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States