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Cheap flights from London Heathrow Airport to Los Angeles from £311

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 3/11. 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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Find the cheapest flights from London Heathrow Airport to Los Angeles

Cheap return flights

Virgin Atlantic Logo
20:25 - 22:41LHR-ONT
33h 16m2 stops
Virgin Atlantic Logo
07:05 - 09:00ONT-LHR
17h 55m1 stop
£363Virgin Atlantic
Find Deal
Wed, 29 Oct - Wed, 5 Nov
Virgin Atlantic Logo
20:00 - 21:20LHR-ONT
32h 20m2 stops
Virgin Atlantic Logo
11:36 - 09:00ONT-LHR
13h 24m1 stop
£375Virgin Atlantic
Find Deal
Tue, 28 Oct - Tue, 4 Nov
British Airways Logo
15:00 - 22:02LHR-ONT
15h 02m1 stop
British Airways Logo
17:03 - 13:15ONT-LHR
12h 12m1 stop
£376British Airways
Find Deal
Sat, 24 Jan - Tue, 3 Feb
Virgin Atlantic Logo
14:45 - 22:41LHR-ONT
14h 56m1 stop
Virgin Atlantic Logo
07:35 - 12:50ONT-LHR
21h 15m1 stop
£377Virgin Atlantic
Find Deal
Thu, 30 Oct - Thu, 6 Nov
British Airways Logo
15:00 - 22:02LHR-ONT
15h 02m1 stop
British Airways Logo
17:03 - 13:15ONT-LHR
12h 12m1 stop
£378British Airways
Find Deal
Sat, 7 Feb - Sat, 21 Feb
Delta Logo
06:30 - 19:19LHR-ONT
19h 49m2 stops
Delta Logo
06:00 - 08:45ONT-LHR
18h 45m2 stops
£396Delta
Find Deal
Thu, 30 Oct - Thu, 6 Nov
American Airlines Logo
12:10 - 21:57LHR-ONT
17h 47m2 stops
American Airlines Logo
10:38 - 09:35ONT-LHR
14h 57m2 stops
£400American Airlines
Find Deal
Thu, 26 Feb - Mon, 2 Mar
Delta Logo
06:30 - 17:09LHR-ONT
18h 39m2 stops
Delta Logo
06:00 - 10:30ONT-LHR
20h 30m2 stops
£407Delta
Find Deal
Sat, 22 Nov - Sat, 29 Nov
American Airlines Logo
12:00 - 18:54LHR-ONT
14h 54m1 stop
American Airlines Logo
16:45 - 12:50ONT-LHR
12h 05m1 stop
£410American Airlines
Find Deal
Wed, 1 Oct - Sun, 5 Oct
Finnair Logo
11:45 - 19:41LHR-ONT
15h 56m1 stop
Finnair Logo
10:47 - 08:35ONT-LHR
13h 48m1 stop
£411Finnair
Find Deal
Mon, 10 Nov - Mon, 17 Nov

American Airlines flights from London Heathrow Airport to Ontario

Our best American Airlines deals on London Heathrow Airport to Ontario flight tickets
American Airlines
26 Feb
LHR12:10London Heathrow
17h 47m
2 stops
ONT21:57Ontario
2 Mar
ONT10:38Ontario
14h 57m
2 stops
LHR09:35London Heathrow
£400
Find similar
American Airlines
1 Oct
LHR12:00London Heathrow
14h 54m
1 stop
ONT18:54Ontario
5 Oct
ONT16:45Ontario
12h 05m
1 stop
LHR12:50London Heathrow
£410
Find similar
American Airlines
22 Sept
LHR15:40London Heathrow
14h 08m
1 stop
ONT21:48Ontario
5 Oct
ONT16:45Ontario
12h 05m
1 stop
LHR12:50London Heathrow
£430
Find similar

Virgin Atlantic flights from London Heathrow Airport to Ontario

Our best Virgin Atlantic deals on London Heathrow Airport to Ontario flight tickets
Virgin Atlantic
29 Oct
LHR20:25London Heathrow
33h 16m
2 stops
ONT22:41Ontario
5 Nov
ONT07:05Ontario
17h 55m
1 stop
LHR09:00London Heathrow
£363
Find similar
Virgin Atlantic
28 Oct
LHR20:00London Heathrow
32h 20m
2 stops
ONT21:20Ontario
4 Nov
ONT11:36Ontario
13h 24m
1 stop
LHR09:00London Heathrow
£375
Find similar
Virgin Atlantic
30 Oct
LHR14:45London Heathrow
14h 56m
1 stop
ONT22:41Ontario
6 Nov
ONT07:35Ontario
21h 15m
1 stop
LHR12:50London Heathrow
£377
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 16 September 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

Wed 29/10

20:25-22:41

2 stops33h 16m

Ontario

Wed 5/11

07:05-09:00

1 stop17h 55m

£363

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 28/10

20:00-21:20

2 stops32h 20m

Ontario

Tue 4/11

11:36-09:00

1 stop13h 24m

£375

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 24/1

15:00-22:02

1 stop15h 02m

Ontario

Tue 3/2

17:03-13:15

1 stop12h 12m

£376

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/10

14:45-22:41

1 stop14h 56m

Ontario

Thu 6/11

07:35-12:50

1 stop21h 15m

£377

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 7/2

15:00-22:02

1 stop15h 02m

Ontario

Sat 21/2

17:03-13:15

1 stop12h 12m

£378

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 30/10

06:30-19:19

2 stops19h 49m

Ontario

Thu 6/11

06:00-08:45

2 stops18h 45m

£396

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

12:10-21:57

2 stops17h 47m

Ontario

Mon 2/3

10:38-09:35

2 stops14h 57m

£400

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sat 22/11

06:30-17:09

2 stops18h 39m

Ontario

Sat 29/11

06:00-10:30

2 stops20h 30m

£407

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 1/10

12:00-18:54

1 stop14h 54m

Ontario

Sun 5/10

16:45-12:50

1 stop12h 05m

£410

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 10/11

11:45-19:41

1 stop15h 56m

Ontario

Mon 17/11

10:47-08:35

1 stop13h 48m

£411

Flights are sorted by cheapest return 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?

The month of September is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £422. If you’re not able to fly to Ontario in September, then February is your next best option. Flight prices from London Heathrow Airport to Ontario during February average around £433.

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 £484. 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 £559. 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 £473 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 £556.

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 £528 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 £429 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

Direct flights

None
There are no direct flights from London Heathrow Airport to Ontario. There are no popular flight routes from London Heathrow Airport to Ontario.
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  • 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 34m.

  • 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 £276Free CancellationRating
7.6
1,323 reviews
Search Finnair flights
British AirwaysPriceFrom £381Free CancellationRating
6.6
7,361 reviews
Search British Airways flights
United AirlinesPriceFrom £381Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
KLMPriceFrom £390Free CancellationRating
7.8
1,385 reviews
Search KLM flights
Virgin AtlanticPriceFrom £404Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom £426Free CancellationRating
6.8
7,407 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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