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Cheap flights from the United Kingdom to Los Angeles from $455

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 7/7. 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

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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

Enter your travel dates to find the best prices.
United Airlines Logo
9:30 am - 9:21 pm
LHR
-
ONT
19h 51m
2 stops
United Airlines Logo
5:00 am - 7:55 am
ONT
-
LHR
18h 55m
2 stops
$655United Airlines
Paz, Kas 1 - Cmt, Kas 14
United Airlines Logo
7:30 am - 8:01 pm
LHR
-
ONT
20h 31m
2 stops
United Airlines Logo
1:18 pm - 12:25 pm
ONT
-
LHR
15h 07m
1 stop
$657United Airlines
Sal, Eyl 22 - Sal, Eki 6
Lufthansa Logo
10:00 am - 9:21 pm
LHR
-
ONT
19h 21m
1 stop
Lufthansa Logo
6:00 am - 7:25 am
ONT
-
LHR
17h 25m
1 stop
$669Lufthansa
Paz, Kas 1 - Cmt, Kas 14
Lufthansa Logo
1:00 pm - 8:01 pm
LHR
-
ONT
15h 01m
1 stop
Lufthansa Logo
9:39 am - 7:25 am
ONT
-
LHR
13h 46m
1 stop
$671Lufthansa
Sal, Eyl 22 - Sal, Eki 6
British Airways Logo
3:00 pm - 10:36 pm
LHR
-
ONT
15h 36m
1 stop
British Airways Logo
12:41 pm - 2:25 pm
ONT
-
LHR
17h 44m
1 stop
$678British Airways
Pzt, Haz 22 - Pzt, Haz 29
British Airways Logo
9:15 am - 11:06 pm
LHR
-
ONT
21h 51m
2 stops
British Airways Logo
11:59 pm - 12:50 pm
ONT
-
LHR
28h 51m
1 stop
$679British Airways
Çar, Eki 7 - Paz, Eki 11
Iberia Logo
11:30 am - 11:06 pm
LGW
-
ONT
19h 36m
2 stops
Iberia Logo
12:35 pm - 8:00 pm
ONT
-
LGW
23h 25m
2 stops
$740Iberia
Per, Eyl 24 - Per, Eki 15
Iberia Logo
11:30 am - 11:36 pm
LGW
-
ONT
20h 06m
2 stops
Iberia Logo
2:22 pm - 8:00 pm
ONT
-
LGW
21h 38m
2 stops
$801Iberia
Per, Eki 1 - Cmt, Eki 10
Multiple Airlines Logo
6:00 pm - 10:23 pm
MAN
-
ONT
36h 23m
2 stops
Multiple Airlines Logo
11:59 pm - 5:15 pm
ONT
-
MAN
33h 16m
2 stops
$925Multiple Airlines
Paz, Kas 22 - Pzt, Ara 7
Multiple Airlines Logo
9:15 am - 11:05 pm
LGW
-
ONT
21h 50m
2 stops
Multiple Airlines Logo
9:36 pm - 7:05 am
ONT
-
LGW
25h 29m
2 stops
$926Multiple Airlines
Sal, Haz 9 - Pzt, Haz 22

Iberia flights from United Kingdom to Ontario

Our best Iberia deals on United Kingdom to Ontario flight tickets
Iberia
Aug 24
LHR2:25 pmLondon Heathrow
14h 47m
1 stop
ONT9:12 pmOntario
Sep 9
ONT2:22 pmOntario
14h 28m
1 stop
LHR12:50 pmLondon Heathrow
$713
Iberia
Jul 20
LHR2:25 pmLondon Heathrow
17h 34m
1 stop
ONT11:59 pmOntario
Jul 27
ONT7:00 amOntario
15h 20m
1 stop
LHR6:20 amLondon Heathrow
$727
Iberia
Jul 27
LHR4:25 pmLondon Heathrow
15h 34m
1 stop
ONT11:59 pmOntario
Aug 26
ONT12:33 pmOntario
14h 22m
1 stop
LHR10:55 amLondon Heathrow
$728

British Airways flights from United Kingdom to Ontario

Our best British Airways deals on United Kingdom to Ontario flight tickets
British Airways
Jun 22
LHR3:00 pmLondon Heathrow
15h 36m
1 stop
ONT10:36 pmOntario
Jun 29
ONT12:41 pmOntario
17h 44m
1 stop
LHR2:25 pmLondon Heathrow
$678
British Airways
Nov 23
LHR3:00 pmLondon Heathrow
15h 23m
1 stop
ONT10:23 pmOntario
Dec 14
ONT4:47 pmOntario
12h 28m
1 stop
LHR1:15 pmLondon Heathrow
$680
British Airways
Aug 4
LHR4:30 pmLondon Heathrow
34h 17m
2 stops
ONT6:47 pmOntario
Aug 24
ONT2:27 pmOntario
13h 43m
1 stop
LHR12:10 pmLondon Heathrow
$693

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 Mayıs 29, 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

Cheapest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Paz 11/1

9:30 am-9:21 pm

2 stops19h 51m

Ontario

Cmt 11/14

5:00 am-7:55 am

2 stops18h 55m

$655

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sal 9/22

7:30 am-8:01 pm

2 stops20h 31m

Ontario

Sal 10/6

1:18 pm-12:25 pm

1 stop15h 07m

$657

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Paz 11/1

10:00 am-9:21 pm

1 stop19h 21m

Ontario

Cmt 11/14

6:00 am-7:25 am

1 stop17h 25m

$669
Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sal 9/22

1:00 pm-8:01 pm

1 stop15h 01m

Ontario

Sal 10/6

9:39 am-7:25 am

1 stop13h 46m

$671

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Pzt 6/22

3:00 pm-10:36 pm

1 stop15h 36m

Ontario

Pzt 6/29

12:41 pm-2:25 pm

1 stop17h 44m

$678

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Çar 10/7

9:15 am-11:06 pm

2 stops21h 51m

Ontario

Paz 10/11

11:59 pm-12:50 pm

1 stop28h 51m

$679

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Per 9/24

11:30 am-11:06 pm

2 stops19h 36m

Ontario

Per 10/15

12:35 pm-8:00 pm

2 stops23h 25m

$740

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Per 10/1

11:30 am-11:36 pm

2 stops20h 06m

Ontario

Cmt 10/10

2:22 pm-8:00 pm

2 stops21h 38m

$801

ManchesterOntario

MAN - ONT

MANONT

Manchester

Paz 11/22

6:00 pm-10:23 pm

2 stops36h 23m

Ontario

Pzt 12/7

11:59 pm-5:15 pm

2 stops33h 16m

$925

LondonOntario

LGW - ONT

LGWONT

London Gatwick

Sal 6/9

9:15 am-11:05 pm

2 stops21h 50m

Ontario

Pzt 6/22

9:36 pm-7:05 am

2 stops25h 29m

$926

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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, March 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 $398. If you aren’t able to travel during the month of March, then book flights to Ontario from United Kingdom during February instead. Flights to Ontario in February, while not as cheap as those in March, still average around $418.

How far in advance should I book a flight from the United Kingdom 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 $651 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 $496 on momondo.

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

You could potentially save up to 29% 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 22m

Direct flights

None
The fastest flight from United Kingdom to Ontario takes 13h 22m
There are no direct flights from United Kingdom to Ontario. There are no popular flight routes from United Kingdom to Ontario.
Search flight deals

Frequently asked questions about flying from the United Kingdom to Ontario

  • 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
British AirwaysPriceFrom $567Free CancellationRating
6.7
8,008 reviews
Search British Airways 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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1 adult
Paz 6/28
Paz 7/5
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