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Cheap flights from London Heathrow Airport to Los Angeles from £319

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 11/3. 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
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
08:30 - 22:18
LHR
-
ONT
20h 48m
2 stops
United Airlines Logo
13:40 - 07:25
ONT
-
LHR
34h 45m
1 stop
£342United Airlines
Fri, 13 Mar - Fri, 20 Mar
Virgin Atlantic Logo
12:20 - 22:33
LHR
-
ONT
17h 13m
1 stop
Virgin Atlantic Logo
22:25 - 07:50
ONT
-
LHR
26h 25m
1 stop
£354Virgin Atlantic
Fri, 13 Mar - Fri, 20 Mar
United Airlines Logo
08:30 - 22:18
LHR
-
ONT
20h 48m
2 stops
United Airlines Logo
23:59 - 06:40
ONT
-
LHR
23h 41m
2 stops
£356United Airlines
Fri, 13 Mar - Fri, 20 Mar
Virgin Atlantic Logo
14:30 - 22:37
LHR
-
ONT
16h 07m
1 stop
Virgin Atlantic Logo
07:30 - 11:55
ONT
-
LHR
20h 25m
1 stop
£360Virgin Atlantic
Thu, 26 Feb - Thu, 5 Mar
United Airlines Logo
10:05 - 17:41
LHR
-
ONT
15h 36m
1 stop
United Airlines Logo
13:40 - 12:00
ONT
-
LHR
14h 20m
1 stop
£365United Airlines
Thu, 26 Feb - Thu, 5 Mar
United Airlines Logo
11:35 - 20:57
LHR
-
ONT
16h 22m
1 stop
United Airlines Logo
13:34 - 12:20
ONT
-
LHR
14h 46m
1 stop
£366United Airlines
Sun, 15 Mar - Mon, 30 Mar
Delta Logo
06:30 - 22:34
LHR
-
ONT
23h 04m
2 stops
Delta Logo
11:59 - 15:35
ONT
-
LHR
19h 36m
1 stop
£369Delta
Thu, 19 Mar - Wed, 1 Apr
United Airlines Logo
09:30 - 20:50
LHR
-
ONT
19h 20m
2 stops
United Airlines Logo
13:40 - 12:00
ONT
-
LHR
14h 20m
1 stop
£369United Airlines
Thu, 26 Feb - Thu, 5 Mar
United Airlines Logo
13:45 - 22:57
LHR
-
ONT
16h 12m
1 stop
United Airlines Logo
13:40 - 12:00
ONT
-
LHR
15h 20m
1 stop
£371United Airlines
Fri, 20 Mar - Tue, 24 Mar
Virgin Atlantic Logo
11:40 - 22:37
LHR
-
ONT
18h 57m
1 stop
Virgin Atlantic Logo
09:55 - 10:00
ONT
-
LHR
16h 05m
1 stop
£372Virgin Atlantic
Sat, 25 Apr - Wed, 27 May

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets
Delta
19 Mar
LHR06:30London Heathrow
23h 04m
2 stops
ONT22:34Ontario
1 Apr
ONT11:59Ontario
19h 36m
1 stop
LHR15:35London Heathrow
£369
Delta
10 Feb
LHR12:30London Heathrow
16h 35m
1 stop
ONT21:05Ontario
2 Mar
ONT13:10Ontario
12h 50m
1 stop
LHR10:00London Heathrow
£379
Delta
9 Feb
LHR15:50London Heathrow
27h 41m
1 stop
ONT11:31Ontario
16 Feb
ONT13:10Ontario
12h 50m
1 stop
LHR10:00London Heathrow
£379

Air France flights from London Heathrow Airport to Ontario

Our best Air France deals on London Heathrow Airport to Ontario flight tickets
Air France
11 Feb
LHR06:20London Heathrow
17h 55m
2 stops
ONT16:15Ontario
25 Mar
ONT06:00Ontario
21h 00m
1 stop
LHR10:00London Heathrow
£385
Air France
18 Feb
LHR06:20London Heathrow
17h 42m
2 stops
ONT16:02Ontario
24 Feb
ONT13:15Ontario
33h 10m
1 stop
LHR06:25London Heathrow
£412

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 29 January 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

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/3

08:30-22:18

2 stops20h 48m

Ontario

Fri 20/3

13:40-07:25

1 stop34h 45m

£342

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/3

12:20-22:33

1 stop17h 13m

Ontario

Fri 20/3

22:25-07:50

1 stop26h 25m

£354

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 13/3

08:30-22:18

2 stops20h 48m

Ontario

Fri 20/3

23:59-06:40

2 stops23h 41m

£356

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

14:30-22:37

1 stop16h 07m

Ontario

Thu 5/3

07:30-11:55

1 stop20h 25m

£360

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

10:05-17:41

1 stop15h 36m

Ontario

Thu 5/3

13:40-12:00

1 stop14h 20m

£365

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 15/3

11:35-20:57

1 stop16h 22m

Ontario

Mon 30/3

13:34-12:20

1 stop14h 46m

£366

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 19/3

06:30-22:34

2 stops23h 04m

Ontario

Wed 1/4

11:59-15:35

1 stop19h 36m

£369

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

09:30-20:50

2 stops19h 20m

Ontario

Thu 5/3

13:40-12:00

1 stop14h 20m

£369

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Fri 20/3

13:45-22:57

1 stop16h 12m

Ontario

Tue 24/3

13:40-12:00

1 stop15h 20m

£371

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 25/4

11:40-22:37

1 stop18h 57m

Ontario

Wed 27/5

09:55-10:00

1 stop16h 05m

£372

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 January is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £400. If you’re not able to fly to Ontario in January, then September is your next best option. Flight prices from London Heathrow Airport to Ontario during September average around £414.

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 £493 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 £382 on momondo.

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

You could potentially save up to 2% 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 £271Free CancellationRating
7.6
1,356 reviews
Search Finnair flights
United AirlinesPriceFrom £359Free CancellationRating
7.4
9,215 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom £366Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom £375Free CancellationRating
6.7
7,705 reviews
Search British Airways flights
KLMPriceFrom £383Free CancellationRating
7.7
1,443 reviews
Search KLM flights
LufthansaPriceFrom £412Free CancellationRating
6.8
7,756 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

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