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Cheap flights from London Heathrow Airport to Los Angeles from £307

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 25/2. 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 return flights

Enter your travel dates to find the best prices.
United Airlines Logo
07:30 - 21:58
LHR
-
ONT
22h 28m2 stops
United Airlines Logo
06:00 - 07:25
ONT
-
LHR
17h 25m1 stop
£382United Airlines
Thu, 22 Jan - Mon, 26 Jan
Delta Logo
08:55 - 21:05
LHR
-
ONT
20h 10m1 stop
Delta Logo
12:41 - 11:40
ONT
-
LHR
14h 59m1 stop
£383Delta
Mon, 12 Jan - Mon, 26 Jan
British Airways Logo
15:00 - 22:48
LHR
-
ONT
15h 48m1 stop
British Airways Logo
17:06 - 13:15
ONT
-
LHR
12h 09m1 stop
£399British Airways
Tue, 3 Feb - Tue, 17 Feb
British Airways Logo
15:00 - 22:48
LHR
-
ONT
15h 48m1 stop
British Airways Logo
15:19 - 12:15
ONT
-
LHR
12h 56m1 stop
£400British Airways
Tue, 3 Feb - Tue, 17 Feb
United Airlines Logo
10:05 - 17:43
LHR
-
ONT
15h 38m1 stop
United Airlines Logo
13:53 - 12:00
ONT
-
LHR
14h 07m1 stop
£405United Airlines
Mon, 26 Jan - Fri, 6 Feb
British Airways Logo
16:25 - 23:40
LHR
-
ONT
15h 15m1 stop
British Airways Logo
11:01 - 08:05
ONT
-
LHR
13h 04m1 stop
£412British Airways
Tue, 21 Apr - Tue, 28 Apr
British Airways Logo
10:05 - 18:45
LHR
-
ONT
16h 40m1 stop
British Airways Logo
16:45 - 13:15
ONT
-
LHR
12h 30m1 stop
£416British Airways
Mon, 19 Jan - Mon, 2 Feb
American Airlines Logo
10:05 - 17:22
LHR
-
ONT
15h 17m1 stop
American Airlines Logo
16:45 - 13:15
ONT
-
LHR
12h 30m1 stop
£419American Airlines
Mon, 19 Jan - Mon, 2 Feb
Lufthansa Logo
10:05 - 17:43
LHR
-
ONT
15h 38m1 stop
Lufthansa Logo
13:24 - 09:40
ONT
-
LHR
12h 16m1 stop
£430Lufthansa
Mon, 12 Jan - Mon, 26 Jan
American Airlines Logo
10:05 - 17:22
LHR
-
ONT
15h 17m1 stop
American Airlines Logo
16:45 - 13:15
ONT
-
LHR
12h 30m1 stop
£434American Airlines
Mon, 19 Jan - Mon, 2 Feb

British Airways flights from London Heathrow Airport to Ontario

Our best British Airways deals on London Heathrow Airport to Ontario flight tickets
British Airways
3 Feb
LHR15:00London Heathrow
15h 48m
1 stop
ONT22:48Ontario
17 Feb
ONT17:06Ontario
12h 09m
1 stop
LHR13:15London Heathrow
£399
Find similar
British Airways
3 Feb
LHR15:00London Heathrow
15h 48m
1 stop
ONT22:48Ontario
17 Feb
ONT15:19Ontario
12h 56m
1 stop
LHR12:15London Heathrow
£400
Find similar
British Airways
21 Apr
LHR16:25London Heathrow
15h 15m
1 stop
ONT23:40Ontario
28 Apr
ONT11:01Ontario
13h 04m
1 stop
LHR08:05London Heathrow
£412
Find similar

American Airlines flights from London Heathrow Airport to Ontario

Our best American Airlines deals on London Heathrow Airport to Ontario flight tickets
American Airlines
19 Jan
LHR10:05London Heathrow
15h 17m
1 stop
ONT17:22Ontario
2 Feb
ONT16:45Ontario
12h 30m
1 stop
LHR13:15London Heathrow
£419
Find similar
American Airlines
19 Jan
LHR10:05London Heathrow
15h 17m
1 stop
ONT17:22Ontario
2 Feb
ONT16:45Ontario
12h 30m
1 stop
LHR13:15London Heathrow
£434
Find similar
American Airlines
19 Jan
LHR10:05London Heathrow
15h 17m
1 stop
ONT17:22Ontario
2 Feb
ONT16:45Ontario
12h 30m
1 stop
LHR13:15London Heathrow
£435
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 18 December 2025.
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

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 22/1

07:30-21:58

2 stops22h 28m

Ontario

Mon 26/1

06:00-07:25

1 stop17h 25m

£382

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/1

08:55-21:05

1 stop20h 10m

Ontario

Mon 26/1

12:41-11:40

1 stop14h 59m

£383

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/2

15:00-22:48

1 stop15h 48m

Ontario

Tue 17/2

17:06-13:15

1 stop12h 09m

£399

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/2

15:00-22:48

1 stop15h 48m

Ontario

Tue 17/2

15:19-12:15

1 stop12h 56m

£400

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 26/1

10:05-17:43

1 stop15h 38m

Ontario

Fri 6/2

13:53-12:00

1 stop14h 07m

£405

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 21/4

16:25-23:40

1 stop15h 15m

Ontario

Tue 28/4

11:01-08:05

1 stop13h 04m

£412

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 19/1

10:05-18:45

1 stop16h 40m

Ontario

Mon 2/2

16:45-13:15

1 stop12h 30m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 19/1

10:05-17:22

1 stop15h 17m

Ontario

Mon 2/2

16:45-13:15

1 stop12h 30m

£419

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 12/1

10:05-17:43

1 stop15h 38m

Ontario

Mon 26/1

13:24-09:40

1 stop12h 16m

£430

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 19/1

10:05-17:22

1 stop15h 17m

Ontario

Mon 2/2

16:45-13:15

1 stop12h 30m

£434

Flights are sorted by cheapest return 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 cheapest month to fly to Ontario?

The month of September is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £428. If you’re not able to fly to Ontario in September, then January is your next best option. Flight prices from London Heathrow Airport to Ontario during January average around £469.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as £492. This is often the case because there is less demand to fly during this day of the week. Flights from London Heathrow Airport to Ontario on a Sunday will generally be more expensive and average around £568. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Ontario?

Flying to Ontario from London Heathrow Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as £481 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Ontario is at midday when prices are around £565.

How far in advance should I book a flight 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 £535 when searching weeks before you fly. 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 £394 on momondo.

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

You could potentially save up to 35% 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 return 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

  • How far is London Heathrow to Ontario by plane?

    Ontario is 5408.1 mi away from London Heathrow. By plane, this route typically takes 13h 27m.

  • 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 were last updated today.

  • 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 a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport 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.

  • 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
FinnairPriceFrom £280Free CancellationRating
7.6
1,338 reviews
Search Finnair flights
Virgin AtlanticPriceFrom £376Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £387Free CancellationRating
6.7
7,585 reviews
Search British Airways flights
United AirlinesPriceFrom £388Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
KLMPriceFrom £396Free CancellationRating
7.7
1,428 reviews
Search KLM flights
LufthansaPriceFrom £433Free CancellationRating
6.8
7,635 reviews
Search Lufthansa flights

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?

Flights from London to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for London to Ontario flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Ontario from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Ontario trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
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