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Cheap flights from London to Los Angeles from $447

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
2:45 pm - 6:17 pmLHR  London Heathrow-ONT Ontario
35h 32m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 12:20 pmONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
$555Alaska Airlines
Thu, Nov 12 - Thu, Nov 26
Alaska Airlines Logo
2:45 pm - 11:06 pmLHR  London Heathrow-ONT Ontario
16h 21m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 12:20 pmONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
$562Alaska Airlines
Mon, Nov 16 - Mon, Nov 23
Alaska Airlines Logo
2:45 pm - 6:17 pmLHR  London Heathrow-ONT Ontario
35h 32m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 12:20 pmONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
$563Alaska Airlines
Sat, Nov 14 - Tue, Dec 1
Alaska Airlines Logo
2:45 pm - 11:06 pmLHR  London Heathrow-ONT Ontario
16h 21m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 12:20 pmONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
$564Alaska Airlines
Mon, Nov 9 - Mon, Nov 16
Alaska Airlines Logo
2:45 pm - 11:18 amLHR  London Heathrow-ONT Ontario
28h 33m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
6:00 am - 12:20 pmONT  Ontario-LHR London Heathrow
22h 20m1 stop Seattle/Tacoma Intl
$565Alaska Airlines
Wed, Nov 11 - Tue, Nov 17
Alaska Airlines Logo
2:45 pm - 10:41 pmLHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:16 pm - 12:20 pmONT  Ontario-LHR London Heathrow
36h 04m1 stop Seattle/Tacoma Intl
$566Alaska Airlines
Sat, Jan 23 - Mon, Jan 25
Alaska Airlines Logo
2:45 pm - 6:17 pmLHR  London Heathrow-ONT Ontario
35h 32m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:01 pm - 12:20 pmONT  Ontario-LHR London Heathrow
36h 19m1 stop Seattle/Tacoma Intl
$567Alaska Airlines
Fri, Nov 13 - Sat, Nov 21
Alaska Airlines Logo
2:45 pm - 10:41 pmLHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:36 am - 12:20 pmONT  Ontario-LHR London Heathrow
16h 44m1 stop Seattle/Tacoma Intl
$568Alaska Airlines
Mon, Jan 18 - Sun, Jan 31
Alaska Airlines Logo
2:45 pm - 10:41 pmLHR  London Heathrow-ONT Ontario
15h 56m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
4:16 pm - 12:20 pmONT  Ontario-LHR London Heathrow
36h 04m1 stop Seattle/Tacoma Intl
$569Alaska Airlines
Sat, Jan 23 - Fri, Jan 29
Alaska Airlines Logo
2:45 pm - 11:31 pmLHR  London Heathrow-ONT Ontario
16h 46m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
11:57 am - 12:20 pmONT  Ontario-LHR London Heathrow
16h 23m1 stop Seattle/Tacoma Intl
$570Alaska Airlines
Mon, Nov 23 - Tue, Dec 8

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Alaska Airlines flights from London to Ontario

Our best Alaska Airlines deals on London to Ontario flight tickets
Alaska Airlines
Nov 12
LHR2:45 pmLondon Heathrow
35h 32m
1 stop
ONT6:17 pmOntario
Nov 26
ONT6:00 amOntario
22h 20m
1 stop
LHR12:20 pmLondon Heathrow
$555
Alaska Airlines
Jan 13
LHR2:45 pmLondon Heathrow
15h 56m
1 stop
ONT10:41 pmOntario
Jan 19
ONT7:00 amOntario
21h 20m
1 stop
LHR12:20 pmLondon Heathrow
$557
Alaska Airlines
Nov 8
LHR2:45 pmLondon Heathrow
16h 21m
1 stop
ONT11:06 pmOntario
Nov 15
ONT6:00 amOntario
22h 20m
1 stop
LHR12:20 pmLondon Heathrow
$562

momondo Fare Finder

 
Use the filters below to find and compare flights from London to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Thu 11/12

2:45 pm-6:17 pm

1 stop35h 32m

Ontario

Thu 11/26

6:00 am-12:20 pm

1 stop22h 20m

$555

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 11/16

2:45 pm-11:06 pm

1 stop16h 21m

Ontario

Mon 11/23

6:00 am-12:20 pm

1 stop22h 20m

$562

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sat 11/14

2:45 pm-6:17 pm

1 stop35h 32m

Ontario

Tue 12/1

6:00 am-12:20 pm

1 stop22h 20m

$563

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 11/9

2:45 pm-11:06 pm

1 stop16h 21m

Ontario

Mon 11/16

6:00 am-12:20 pm

1 stop22h 20m

$564

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Wed 11/11

2:45 pm-11:18 am

1 stop28h 33m

Ontario

Tue 11/17

6:00 am-12:20 pm

1 stop22h 20m

$565

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sat 1/23

2:45 pm-10:41 pm

1 stop15h 56m

Ontario

Mon 1/25

4:16 pm-12:20 pm

1 stop36h 04m

$566

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Fri 11/13

2:45 pm-6:17 pm

1 stop35h 32m

Ontario

Sat 11/21

4:01 pm-12:20 pm

1 stop36h 19m

$567
Quickest round-trip

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 1/18

2:45 pm-10:41 pm

1 stop15h 56m

Ontario

Sun 1/31

11:36 am-12:20 pm

1 stop16h 44m

$568

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Sat 1/23

2:45 pm-10:41 pm

1 stop15h 56m

Ontario

Fri 1/29

4:16 pm-12:20 pm

1 stop36h 04m

$569

LondonOntario

LHR London Heathrow - ONT Ontario

LHRONT

London Heathrow

Mon 11/23

2:45 pm-11:31 pm

1 stop16h 46m

Ontario

Tue 12/8

11:57 am-12:20 pm

1 stop16h 23m

$570

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 London 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 typical price of a round-trip flight between London and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $672 to $821.
The lowest price recently found on this route was $553.

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from London to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $553. If you aren’t able to travel during the month of January, then book flights to Ontario from London during February instead. Flights to Ontario in February, while not as cheap as those in January, still average around $567.

Can stopping save me money on London to Ontario flights?

You could potentially save up to 15% on your flight if you consider stops on a London to Ontario flight.

When to book flights from London to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ontario according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London to Ontario (LON to ONT) flight deals and tips

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

Best Price Found

$447

Fastest flight time

13h 30m

Direct flights

None
The best one-way flight to Ontario from London in the past 72 hours is $447. The best round-trip flight deal from London to Ontario found on momondo in the last 72 hours is $555.
The fastest flight from London to Ontario takes 13h 30m
There are no direct flights from London to Ontario. There are no popular flight routes from London to Ontario.
Search flight deals

Frequently asked questions about flying from London to Ontario

  • How far is London to Ontario by plane?

    The distance between London and Ontario is about 5417.5 mi. Typically, this will take 13h 30m by plane in normal conditions.

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

    Prices for flights from London to Ontario Airport are updated daily.

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London to Ontario Airport.

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

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek 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 London to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from London.

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

Yes. momondo allows you to filter the results for London to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of London 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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