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Cheap flights from the United Kingdom to Los Angeles from $411

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 5/27. 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

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
10:55 am - 11:44 pm
LHR
-
ONT
20h 49m
1 stop
Virgin Atlantic Logo
11:59 am - 2:00 pm
ONT
-
LHR
18h 01m
1 stop
$682Virgin Atlantic
Thu, Jul 9 - Thu, Jul 16
Multiple Airlines Logo
10:55 am - 11:44 pm
LHR
-
ONT
20h 49m
1 stop
Multiple Airlines Logo
1:42 pm - 3:35 pm
ONT
-
LHR
17h 53m
1 stop
$686Multiple Airlines
Thu, Jul 9 - Thu, Jul 16
Air France Logo
11:15 am - 9:44 pm
LHR
-
ONT
18h 29m
1 stop
Air France Logo
11:48 am - 1:15 pm
ONT
-
LHR
17h 27m
1 stop
$687Air France
Tue, Jul 14 - Thu, Jul 30
British Airways Logo
2:25 pm - 9:08 pm
LHR
-
ONT
14h 43m
1 stop
British Airways Logo
1:31 pm - 10:30 am
ONT
-
LHR
12h 59m
1 stop
$689British Airways
Wed, Sep 23 - Tue, Sep 29
Virgin Atlantic Logo
10:55 am - 4:17 pm
LHR
-
ONT
13h 22m
1 stop
Virgin Atlantic Logo
1:29 pm - 11:00 am
ONT
-
LHR
13h 31m
1 stop
$693Virgin Atlantic
Thu, May 21 - Tue, May 26
Delta Logo
6:30 am - 5:10 pm
LHR
-
ONT
18h 40m
2 stops
Delta Logo
5:50 pm - 3:35 pm
ONT
-
LHR
13h 45m
1 stop
$703Delta
Thu, May 21 - Wed, Jun 3
Delta Logo
6:30 am - 4:17 pm
LHR
-
ONT
17h 47m
2 stops
Delta Logo
1:35 pm - 3:35 pm
ONT
-
LHR
18h 00m
1 stop
$704Delta
Thu, May 21 - Wed, Jun 3
KLM Logo
10:55 am - 4:17 pm
LHR
-
ONT
13h 22m
1 stop
KLM Logo
1:29 pm - 11:00 am
ONT
-
LHR
13h 31m
1 stop
$705KLM
Tue, May 12 - Tue, Jun 2
British Airways Logo
5:00 pm - 7:56 pm
LCY
-
ONT
34h 56m
2 stops
British Airways Logo
5:44 am - 11:30 am
ONT
-
LCY
21h 46m
2 stops
$774British Airways
Tue, May 26 - Tue, Jun 2
KLM Logo
5:55 am - 5:08 pm
BHX
-
ONT
19h 13m
2 stops
KLM Logo
1:00 pm - 4:50 pm
ONT
-
BHX
19h 50m
2 stops
$1,151KLM
Fri, Jun 5 - Tue, Jun 9

Virgin Atlantic flights from United Kingdom to Ontario

Our best Virgin Atlantic deals on United Kingdom to Ontario flight tickets
Virgin Atlantic
Jul 9
LHR10:55 amLondon Heathrow
20h 49m
1 stop
ONT11:44 pmOntario
Jul 16
ONT11:59 amOntario
18h 01m
1 stop
LHR2:00 pmLondon Heathrow
$682
Virgin Atlantic
May 21
LHR10:55 amLondon Heathrow
13h 22m
1 stop
ONT4:17 pmOntario
May 26
ONT1:29 pmOntario
13h 31m
1 stop
LHR11:00 amLondon Heathrow
$693
Virgin Atlantic
Sep 30
LHR10:55 amLondon Heathrow
20h 49m
1 stop
ONT11:44 pmOntario
Oct 24
ONT7:00 amOntario
21h 10m
1 stop
LHR12:10 pmLondon Heathrow
$702

Air France flights from United Kingdom to Ontario

Our best Air France deals on United Kingdom to Ontario flight tickets
Air France
Jul 14
LHR11:15 amLondon Heathrow
18h 29m
1 stop
ONT9:44 pmOntario
Jul 30
ONT11:48 amOntario
17h 27m
1 stop
LHR1:15 pmLondon Heathrow
$687
Air France
Jun 2
MAN1:00 pmManchester
16h 48m
1 stop
ONT9:48 pmOntario
Jun 16
ONT11:50 amOntario
35h 25m
1 stop
MAN7:15 amManchester
$1,191
Air France
Apr 19
MAN11:15 amManchester
17h 45m
1 stop
ONT9:00 pmOntario
May 13
ONT12:08 pmOntario
17h 52m
2 stops
MAN2:00 pmManchester
$1,422

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 April 16, 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

Thu 7/9

10:55 am-11:44 pm

1 stop20h 49m

Ontario

Thu 7/16

11:59 am-2:00 pm

1 stop18h 01m

$682

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 7/9

10:55 am-11:44 pm

1 stop20h 49m

Ontario

Thu 7/16

1:42 pm-3:35 pm

1 stop17h 53m

$686

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 7/14

11:15 am-9:44 pm

1 stop18h 29m

Ontario

Thu 7/30

11:48 am-1:15 pm

1 stop17h 27m

$687

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/23

2:25 pm-9:08 pm

1 stop14h 43m

Ontario

Tue 9/29

1:31 pm-10:30 am

1 stop12h 59m

$689
Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/21

10:55 am-4:17 pm

1 stop13h 22m

Ontario

Tue 5/26

1:29 pm-11:00 am

1 stop13h 31m

$693

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/21

6:30 am-5:10 pm

2 stops18h 40m

Ontario

Wed 6/3

5:50 pm-3:35 pm

1 stop13h 45m

$703

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 5/21

6:30 am-4:17 pm

2 stops17h 47m

Ontario

Wed 6/3

1:35 pm-3:35 pm

1 stop18h 00m

$704

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 5/12

10:55 am-4:17 pm

1 stop13h 22m

Ontario

Tue 6/2

1:29 pm-11:00 am

1 stop13h 31m

$705

LondonOntario

LCY - ONT

LCYONT

London City

Tue 5/26

5:00 pm-7:56 pm

2 stops34h 56m

Ontario

Tue 6/2

5:44 am-11:30 am

2 stops21h 46m

$774

BirminghamOntario

BHX - ONT

BHXONT

Birmingham

Fri 6/5

5:55 am-5:08 pm

2 stops19h 13m

Ontario

Tue 6/9

1:00 pm-4:50 pm

2 stops19h 50m

$1,151

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, 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 $674 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 36% 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

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 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.

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

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