Latest deals
Insights
When to book
FAQs
Price Alerts

Cheap flights from London Heathrow Airport to Los Angeles from $370

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 1/7. 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
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.
United Airlines Logo
9:30 am - 8:20 pm
LHR
-
ONT
18h 50m
2 stops
United Airlines Logo
1:18 pm - 7:25 am
ONT
-
LHR
34h 07m
1 stop
$601United Airlines
Fri, Dec 11 - Sun, Dec 27
United Airlines Logo
9:00 am - 8:15 pm
LHR
-
ONT
19h 15m
2 stops
United Airlines Logo
6:00 am - 7:40 am
ONT
-
LHR
17h 40m
1 stop
$602United Airlines
Wed, Nov 18 - Thu, Nov 19
United Airlines Logo
8:40 am - 8:01 pm
LHR
-
ONT
19h 21m
2 stops
United Airlines Logo
7:00 am - 8:30 am
ONT
-
LHR
17h 30m
1 stop
$604United Airlines
Fri, Aug 28 - Thu, Sep 10
United Airlines Logo
8:40 am - 8:01 pm
LHR
-
ONT
19h 21m
2 stops
United Airlines Logo
1:56 pm - 2:10 pm
ONT
-
LHR
16h 14m
1 stop
$605United Airlines
Wed, Sep 16 - Mon, Sep 21
United Airlines Logo
8:40 am - 8:01 pm
LHR
-
ONT
19h 21m
2 stops
United Airlines Logo
5:00 am - 9:40 am
ONT
-
LHR
20h 40m
1 stop
$606United Airlines
Wed, Sep 16 - Wed, Sep 30
United Airlines Logo
8:40 am - 8:01 pm
LHR
-
ONT
19h 21m
2 stops
United Airlines Logo
5:00 am - 12:35 pm
ONT
-
LHR
23h 35m
1 stop
$606United Airlines
Mon, Aug 24 - Sun, Sep 6
United Airlines Logo
6:35 am - 8:51 pm
LHR
-
ONT
22h 16m
2 stops
United Airlines Logo
6:00 am - 10:15 am
ONT
-
LHR
20h 15m
1 stop
$606United Airlines
Wed, Nov 18 - Thu, Nov 19
United Airlines Logo
8:45 am - 8:01 pm
LHR
-
ONT
19h 16m
2 stops
United Airlines Logo
7:00 am - 6:55 am
ONT
-
LHR
15h 55m
2 stops
$606United Airlines
Sat, Aug 29 - Sat, Sep 5
United Airlines Logo
6:35 am - 8:51 pm
LHR
-
ONT
22h 16m
2 stops
United Airlines Logo
1:29 pm - 9:40 am
ONT
-
LHR
12h 11m
1 stop
$607United Airlines
Wed, Nov 18 - Sat, Nov 21
United Airlines Logo
7:30 am - 8:51 pm
LHR
-
ONT
21h 21m
2 stops
United Airlines Logo
6:00 am - 7:40 am
ONT
-
LHR
17h 40m
1 stop
$608United Airlines
Wed, Nov 18 - Thu, Nov 19

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets
Delta
Aug 11
LHR11:40 amLondon Heathrow
19h 05m
1 stop
ONT10:45 pmOntario
Aug 25
ONT6:01 pmOntario
13h 34m
1 stop
LHR3:35 pmLondon Heathrow
$699
Delta
Aug 11
LHR10:55 amLondon Heathrow
13h 29m
1 stop
ONT4:24 pmOntario
Aug 24
ONT9:43 amOntario
16h 17m
1 stop
LHR10:00 amLondon Heathrow
$702
Delta
Aug 6
LHR6:30 amLondon Heathrow
18h 51m
2 stops
ONT5:21 pmOntario
Aug 10
ONT9:43 amOntario
20h 07m
2 stops
LHR1:50 pmLondon Heathrow
$766

United Airlines flights from London Heathrow Airport to Ontario

Our best United Airlines deals on London Heathrow Airport to Ontario flight tickets
United Airlines
Dec 11
LHR9:30 amLondon Heathrow
18h 50m
2 stops
ONT8:20 pmOntario
Dec 27
ONT1:18 pmOntario
34h 07m
1 stop
LHR7:25 amLondon Heathrow
$601
United Airlines
Nov 18
LHR9:00 amLondon Heathrow
19h 15m
2 stops
ONT8:15 pmOntario
Nov 19
ONT6:00 amOntario
17h 40m
1 stop
LHR7:40 amLondon Heathrow
$602
United Airlines
Aug 28
LHR8:40 amLondon Heathrow
19h 21m
2 stops
ONT8:01 pmOntario
Sep 10
ONT7:00 amOntario
17h 30m
1 stop
LHR8:30 amLondon Heathrow
$604

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 31, 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

Fri 12/11

9:30 am-8:20 pm

2 stops18h 50m

Ontario

Sun 12/27

1:18 pm-7:25 am

1 stop34h 07m

$601

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

9:00 am-8:15 pm

2 stops19h 15m

Ontario

Thu 11/19

6:00 am-7:40 am

1 stop17h 40m

$602

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 8/28

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Thu 9/10

7:00 am-8:30 am

1 stop17h 30m

$604

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/16

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Mon 9/21

1:56 pm-2:10 pm

1 stop16h 14m

$605

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 9/16

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Wed 9/30

5:00 am-9:40 am

1 stop20h 40m

$606

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 8/24

8:40 am-8:01 pm

2 stops19h 21m

Ontario

Sun 9/6

5:00 am-12:35 pm

1 stop23h 35m

$606

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

6:35 am-8:51 pm

2 stops22h 16m

Ontario

Thu 11/19

6:00 am-10:15 am

1 stop20h 15m

$606

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 8/29

8:45 am-8:01 pm

2 stops19h 16m

Ontario

Sat 9/5

7:00 am-6:55 am

2 stops15h 55m

$606
Quickest round-trip

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

6:35 am-8:51 pm

2 stops22h 16m

Ontario

Sat 11/21

1:29 pm-9:40 am

1 stop12h 11m

$607

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 11/18

7:30 am-8:51 pm

2 stops21h 21m

Ontario

Thu 11/19

6:00 am-7:40 am

1 stop17h 40m

$608

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

Prices are currently low for flights on this route.

Typical prices usually range from $707 to $897.
The lowest price recently found on this route was $601.

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 $544. 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 19% 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.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 8/30
Sun 9/6
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States