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Cheap flights from London Heathrow Airport to Los Angeles from $512

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 9/21. 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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0 bags

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Find the cheapest flights from London Heathrow Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
12:55 pm - 10:58 pm
LHR
-
ONT
18h 03m
1 stop
British Airways Logo
10:29 am - 9:00 am
ONT
-
LHR
14h 31m
1 stop
$619British Airways
qua, ago 19 - qua, ago 26
British Airways Logo
4:30 pm - 11:57 pm
LHR
-
ONT
15h 27m
1 stop
British Airways Logo
4:47 pm - 1:15 pm
ONT
-
LHR
12h 28m
1 stop
$635British Airways
ter, nov 3 - ter, nov 24
British Airways Logo
3:00 pm - 10:23 pm
LHR
-
ONT
15h 23m
1 stop
British Airways Logo
4:47 pm - 1:15 pm
ONT
-
LHR
12h 28m
1 stop
$637British Airways
seg, nov 2 - seg, nov 23
British Airways Logo
4:00 pm - 9:29 am
LHR
-
ONT
49h 29m
2 stops
British Airways Logo
1:10 pm - 3:05 pm
ONT
-
LHR
17h 55m
1 stop
$648British Airways
ter, jul 7 - seg, jul 13
Virgin Atlantic Logo
10:55 am - 11:49 pm
LHR
-
ONT
20h 54m
1 stop
Virgin Atlantic Logo
1:00 pm - 11:00 am
ONT
-
LHR
14h 00m
1 stop
$650Virgin Atlantic
ter, jun 16 - ter, jun 23
United Airlines Logo
7:25 am - 6:11 pm
LHR
-
ONT
18h 46m
2 stops
United Airlines Logo
1:18 pm - 9:40 am
ONT
-
LHR
12h 22m
1 stop
$658United Airlines
sáb, set 5 - sáb, set 19
United Airlines Logo
7:30 am - 10:59 pm
LHR
-
ONT
23h 29m
2 stops
United Airlines Logo
6:05 am - 7:25 am
ONT
-
LHR
17h 20m
1 stop
$659United Airlines
seg, out 5 - qui, out 15
British Airways Logo
2:25 pm - 9:08 pm
LHR
-
ONT
14h 43m
1 stop
British Airways Logo
11:59 pm - 9:05 am
ONT
-
LHR
25h 06m
1 stop
$660British Airways
qua, set 23 - dom, set 27
British Airways Logo
12:55 pm - 10:38 pm
LHR
-
ONT
17h 43m
1 stop
British Airways Logo
10:22 am - 10:55 am
ONT
-
LHR
16h 33m
1 stop
$661British Airways
qua, jun 3 - ter, jun 9
Iberia Logo
10:50 am - 6:47 pm
LHR
-
ONT
39h 57m
2 stops
Iberia Logo
10:29 am - 12:10 pm
ONT
-
LHR
17h 41m
1 stop
$662Iberia
qua, ago 19 - qua, ago 26

Virgin Atlantic flights from London Heathrow Airport to Ontario

Our best Virgin Atlantic deals on London Heathrow Airport to Ontario flight tickets
Virgin Atlantic
Jun 9
LHR10:55 amLondon Heathrow
13h 46m
1 stop
ONT4:41 pmOntario
Jul 23
ONT7:05 amOntario
15h 20m
1 stop
LHR6:25 amLondon Heathrow
$643
Virgin Atlantic
Jun 6
LHR10:55 amLondon Heathrow
13h 22m
1 stop
ONT4:17 pmOntario
Jun 27
ONT1:00 pmOntario
13h 00m
1 stop
LHR10:00 amLondon Heathrow
$684
Virgin Atlantic
Jul 14
LHR12:25 pmLondon Heathrow
19h 23m
2 stops
ONT11:48 pmOntario
Aug 12
ONT11:55 amOntario
16h 15m
1 stop
LHR12:10 pmLondon Heathrow
$690

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets
Delta
May 21
LHR1:25 pmLondon Heathrow
16h 23m
1 stop
ONT9:48 pmOntario
May 23
ONT1:29 pmOntario
22h 41m
2 stops
LHR8:10 pmLondon Heathrow
$682
Delta
Jul 1
LHR10:55 amLondon Heathrow
13h 46m
1 stop
ONT4:41 pmOntario
Jul 10
ONT6:01 pmOntario
13h 34m
1 stop
LHR3:35 pmLondon Heathrow
$686
Delta
Jul 4
LHR10:55 amLondon Heathrow
19h 28m
1 stop
ONT10:23 pmOntario
Jul 10
ONT6:01 pmOntario
13h 34m
1 stop
LHR3:35 pmLondon Heathrow
$697

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 maio 7, 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

qua 8/19

12:55 pm-10:58 pm

1 stop18h 03m

Ontario

qua 8/26

10:29 am-9:00 am

1 stop14h 31m

$619

LondonOntario

LHR - ONT

LHRONT

London Heathrow

ter 11/3

4:30 pm-11:57 pm

1 stop15h 27m

Ontario

ter 11/24

4:47 pm-1:15 pm

1 stop12h 28m

$635
Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

seg 11/2

3:00 pm-10:23 pm

1 stop15h 23m

Ontario

seg 11/23

4:47 pm-1:15 pm

1 stop12h 28m

$637

LondonOntario

LHR - ONT

LHRONT

London Heathrow

ter 7/7

4:00 pm-9:29 am

2 stops49h 29m

Ontario

seg 7/13

1:10 pm-3:05 pm

1 stop17h 55m

$648

LondonOntario

LHR - ONT

LHRONT

London Heathrow

ter 6/16

10:55 am-11:49 pm

1 stop20h 54m

Ontario

ter 6/23

1:00 pm-11:00 am

1 stop14h 00m

$650

LondonOntario

LHR - ONT

LHRONT

London Heathrow

sáb 9/5

7:25 am-6:11 pm

2 stops18h 46m

Ontario

sáb 9/19

1:18 pm-9:40 am

1 stop12h 22m

$658

LondonOntario

LHR - ONT

LHRONT

London Heathrow

seg 10/5

7:30 am-10:59 pm

2 stops23h 29m

Ontario

qui 10/15

6:05 am-7:25 am

1 stop17h 20m

$659

LondonOntario

LHR - ONT

LHRONT

London Heathrow

qua 9/23

2:25 pm-9:08 pm

1 stop14h 43m

Ontario

dom 9/27

11:59 pm-9:05 am

1 stop25h 06m

$660

LondonOntario

LHR - ONT

LHRONT

London Heathrow

qua 6/3

12:55 pm-10:38 pm

1 stop17h 43m

Ontario

ter 6/9

10:22 am-10:55 am

1 stop16h 33m

$661

LondonOntario

LHR - ONT

LHRONT

London Heathrow

qua 8/19

10:50 am-6:47 pm

2 stops39h 57m

Ontario

qua 8/26

10:29 am-12:10 pm

1 stop17h 41m

$662

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 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 $526. 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.

How far in advance should I book a flight from London Heathrow Airport to Ontario?

You are more likely to see cheaper flights to Ontario from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $675 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from London Heathrow Airport for as low as $496 on momondo.

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

You could potentially save up to 25% 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 22m

Direct flights

None
The fastest flight from London Heathrow Airport to Ontario takes 13h 22m
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 22m 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 many operators does momondo search for flights from London Heathrow Airport to Ontario Airport?

  • 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.

  • What is the most popular airline from London Heathrow Airport to Ontario?

Best airlines flying from London Heathrow Airport to Ontario

Compare and see reviews for airlines that fly from London Heathrow Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $567Free CancellationRating
6.7
7,949 reviews
Search British Airways flights

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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