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Cheap flights from London Heathrow Airport to Los Angeles from $462

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Los Angeles departing on 8/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from London Heathrow Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
8:25 pm - 4:12 pm
LHR
-
ONT
27h 47m
2 stops
Virgin Atlantic Logo
7:00 am - 8:05 am
ONT
-
LHR
17h 05m
2 stops
$612Virgin Atlantic
Wed, Nov 18 - Wed, Dec 2
Virgin Atlantic Logo
9:55 am - 10:45 pm
LHR
-
ONT
20h 50m
2 stops
Virgin Atlantic Logo
1:04 pm - 1:05 pm
ONT
-
LHR
16h 01m
2 stops
$614Virgin Atlantic
Thu, Sep 3 - Mon, Sep 14
Virgin Atlantic Logo
8:25 pm - 4:12 pm
LHR
-
ONT
27h 47m
2 stops
Virgin Atlantic Logo
7:00 am - 11:40 am
ONT
-
LHR
20h 40m
1 stop
$618Virgin Atlantic
Wed, Nov 18 - Wed, Dec 2
Virgin Atlantic Logo
9:55 am - 10:45 pm
LHR
-
ONT
20h 50m
2 stops
Virgin Atlantic Logo
11:54 am - 3:35 pm
ONT
-
LHR
19h 41m
1 stop
$620Virgin Atlantic
Thu, Sep 3 - Mon, Sep 14
Virgin Atlantic Logo
10:45 am - 4:13 pm
LHR
-
ONT
13h 28m
1 stop
Virgin Atlantic Logo
1:00 pm - 10:00 am
ONT
-
LHR
13h 00m
1 stop
$629Virgin Atlantic
Thu, Dec 24 - Sat, Jan 9
Virgin Atlantic Logo
10:45 am - 4:24 pm
LHR
-
ONT
13h 39m
1 stop
Virgin Atlantic Logo
12:00 pm - 9:00 am
ONT
-
LHR
13h 00m
1 stop
$634Virgin Atlantic
Tue, Nov 3 - Tue, Nov 10
Virgin Atlantic Logo
12:20 pm - 10:43 pm
LHR
-
ONT
17h 23m
1 stop
Virgin Atlantic Logo
1:17 pm - 10:00 am
ONT
-
LHR
12h 43m
1 stop
$636Virgin Atlantic
Sat, Oct 31 - Sat, Nov 7
Virgin Atlantic Logo
10:45 am - 4:12 pm
LHR
-
ONT
13h 27m
1 stop
Virgin Atlantic Logo
1:00 pm - 10:00 am
ONT
-
LHR
13h 00m
1 stop
$638Virgin Atlantic
Wed, Dec 16 - Wed, Jan 6
Virgin Atlantic Logo
10:55 am - 4:35 pm
LHR
-
ONT
13h 40m
1 stop
Virgin Atlantic Logo
12:17 pm - 11:20 am
ONT
-
LHR
15h 03m
1 stop
$640Virgin Atlantic
Thu, Sep 10 - Sat, Sep 26
Virgin Atlantic Logo
10:45 am - 4:12 pm
LHR
-
ONT
13h 27m
1 stop
Virgin Atlantic Logo
7:00 am - 7:50 am
ONT
-
LHR
16h 50m
1 stop
$641Virgin Atlantic
Wed, Nov 18 - Wed, Dec 2

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Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets
Delta
Sep 24
LHR1:25 pmLondon Heathrow
17h 01m
1 stop
ONT10:26 pmOntario
Oct 9
ONT6:20 amOntario
21h 50m
1 stop
LHR12:10 pmLondon Heathrow
$662
Delta
Dec 11
LHR12:20 pmLondon Heathrow
18h 23m
1 stop
ONT10:43 pmOntario
Jan 6
ONT12:00 pmOntario
13h 00m
1 stop
LHR9:00 amLondon Heathrow
$665
Delta
Sep 26
LHR10:55 amLondon Heathrow
13h 40m
1 stop
ONT4:35 pmOntario
Oct 13
ONT1:17 pmOntario
13h 43m
1 stop
LHR11:00 amLondon Heathrow
$680

Alaska Airlines flights from London Heathrow Airport to Ontario

Our best Alaska Airlines deals on London Heathrow Airport to Ontario flight tickets
Alaska Airlines
Jul 7
LHR5:00 pmLondon Heathrow
14h 11m
1 stop
ONT11:11 pmOntario
Jul 14
ONT5:26 pmOntario
13h 39m
1 stop
LHR3:05 pmLondon Heathrow
$748
Alaska Airlines
Jul 10
LHR5:00 pmLondon Heathrow
14h 11m
1 stop
ONT11:11 pmOntario
Jul 14
ONT5:26 pmOntario
13h 39m
1 stop
LHR3:05 pmLondon Heathrow
$758
Alaska Airlines
Jul 9
LHR5:00 pmLondon Heathrow
14h 11m
1 stop
ONT11:11 pmOntario
Jul 13
ONT9:20 pmOntario
33h 45m
1 stop
LHR3:05 pmLondon Heathrow
$763

momondo Fare Finder

 
Customize your flight search to find flights from London Heathrow Airport 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 6, 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

8:25 pm-4:12 pm

2 stops27h 47m

Ontario

Wed 12/2

7:00 am-8:05 am

2 stops17h 05m

$612

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/3

9:55 am-10:45 pm

2 stops20h 50m

Ontario

Mon 9/14

1:04 pm-1:05 pm

2 stops16h 01m

$614

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

8:25 pm-4:12 pm

2 stops27h 47m

Ontario

Wed 12/2

7:00 am-11:40 am

1 stop20h 40m

$618

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/3

9:55 am-10:45 pm

2 stops20h 50m

Ontario

Mon 9/14

11:54 am-3:35 pm

1 stop19h 41m

$620

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 12/24

10:45 am-4:13 pm

1 stop13h 28m

Ontario

Sat 1/9

1:00 pm-10:00 am

1 stop13h 00m

$629

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 11/3

10:45 am-4:24 pm

1 stop13h 39m

Ontario

Tue 11/10

12:00 pm-9:00 am

1 stop13h 00m

$634

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 10/31

12:20 pm-10:43 pm

1 stop17h 23m

Ontario

Sat 11/7

1:17 pm-10:00 am

1 stop12h 43m

$636
Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 12/16

10:45 am-4:12 pm

1 stop13h 27m

Ontario

Wed 1/6

1:00 pm-10:00 am

1 stop13h 00m

$638

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 9/10

10:55 am-4:35 pm

1 stop13h 40m

Ontario

Sat 9/26

12:17 pm-11:20 am

1 stop15h 03m

$640

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

10:45 am-4:12 pm

1 stop13h 27m

Ontario

Wed 12/2

7:00 am-7:50 am

1 stop16h 50m

$641

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 London Heathrow Airport 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 Heathrow Airport and Ontario?

What is the cheapest month to fly to Ontario?

In general, February is the cheapest month to fly from London Heathrow Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $534. If you aren’t able to travel during the month of February, then book flights to Ontario from London Heathrow Airport during January instead. Flights to Ontario in January, while not as cheap as those in February, still average around $553.

Can stopping save me money on London Heathrow Airport to Ontario flights?

You could potentially save up to 5% on your flight if you consider stops on a London Heathrow Airport to Ontario flight.

When to book flights from London Heathrow Airport to Ontario

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

Cheap London Heathrow Airport to Ontario (LHR to ONT) flight deals and tips

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

Fastest flight time

13h 27m

Direct flights

None
The fastest flight from London Heathrow Airport to Ontario takes 13h 27m
There are no direct flights from London Heathrow Airport to Ontario. There are no popular flight routes from London Heathrow Airport to Ontario.
Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Ontario

  • How far is London Heathrow to Ontario by plane?

    London Heathrow and Ontario are 5408.1 mi apart from one another. 13h 27m is a normal flight duration for this route.

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

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

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

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

    The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Why use momondo?

Why should I use momondo to find a flight deal from London to Ontario?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Ontario. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Ontario from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once all potential London to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Yes momondo offers price alerts on flights to Ontario from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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