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Cheap flights from London Heathrow Airport to Los Angeles from £312

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 9/2. 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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Find the cheapest flights from London Heathrow Airport to Los Angeles

Cheap return flights

Enter your travel dates to find the best prices.
Virgin Atlantic Logo
06:30 - 22:38LHR-ONT
24h 08m2 stops
Virgin Atlantic Logo
13:00 - 06:55ONT-LHR
33h 55m2 stops
£424Virgin Atlantic
Find Deal
Thu, 26 Feb - Mon, 2 Mar
Virgin Atlantic Logo
10:00 - 22:38LHR-ONT
44h 38m2 stops
Virgin Atlantic Logo
13:00 - 10:00ONT-LHR
13h 00m1 stop
£425Virgin Atlantic
Find Deal
Thu, 26 Feb - Mon, 2 Mar
Delta Logo
06:30 - 21:07LHR-ONT
22h 37m2 stops
Delta Logo
07:30 - 10:30ONT-LHR
19h 00m1 stop
£427Delta
Find Deal
Thu, 26 Feb - Mon, 2 Mar
Delta Logo
12:30 - 21:07LHR-ONT
16h 37m1 stop
Delta Logo
13:00 - 11:40ONT-LHR
14h 40m1 stop
£438Delta
Find Deal
Tue, 3 Feb - Thu, 19 Feb
KLM Logo
14:45 - 22:38LHR-ONT
14h 53m1 stop
KLM Logo
13:00 - 09:50ONT-LHR
12h 50m1 stop
£446KLM
Find Deal
Thu, 26 Mar - Sat, 4 Apr
KLM Logo
14:45 - 22:38LHR-ONT
14h 53m1 stop
KLM Logo
13:00 - 09:50ONT-LHR
12h 50m1 stop
£446KLM
Find Deal
Thu, 26 Mar - Mon, 30 Mar
United Airlines Logo
08:30 - 22:49LHR-ONT
22h 19m2 stops
United Airlines Logo
13:40 - 08:30ONT-LHR
34h 50m2 stops
£493United Airlines
Find Deal
Wed, 3 Dec - Wed, 24 Dec
British Airways Logo
11:45 - 19:41LHR-ONT
15h 56m1 stop
British Airways Logo
14:42 - 10:00ONT-LHR
35h 18m1 stop
£494British Airways
Find Deal
Tue, 2 Dec - Mon, 22 Dec
United Airlines Logo
10:05 - 17:37LHR-ONT
15h 32m1 stop
United Airlines Logo
13:50 - 12:00ONT-LHR
14h 10m1 stop
£495United Airlines
Find Deal
Tue, 2 Dec - Tue, 9 Dec
British Airways Logo
15:00 - 22:48LHR-ONT
15h 48m1 stop
British Airways Logo
15:19 - 12:15ONT-LHR
12h 56m1 stop
£496British Airways
Find Deal
Tue, 10 Feb - Tue, 3 Mar

Virgin Atlantic flights from London Heathrow Airport to Ontario

Our best Virgin Atlantic deals on London Heathrow Airport to Ontario flight tickets
Virgin Atlantic
26 Feb
LHR06:30London Heathrow
24h 08m
2 stops
ONT22:38Ontario
2 Mar
ONT13:00Ontario
33h 55m
2 stops
LHR06:55London Heathrow
£424
Find similar
Virgin Atlantic
26 Feb
LHR10:00London Heathrow
44h 38m
2 stops
ONT22:38Ontario
2 Mar
ONT13:00Ontario
13h 00m
1 stop
LHR10:00London Heathrow
£425
Find similar
Virgin Atlantic
26 Feb
LHR10:45London Heathrow
21h 07m
1 stop
ONT23:52Ontario
2 Mar
ONT06:45Ontario
22h 05m
1 stop
LHR12:50London Heathrow
£437
Find similar

Delta flights from London Heathrow Airport to Ontario

Our best Delta deals on London Heathrow Airport to Ontario flight tickets
Delta
26 Feb
LHR06:30London Heathrow
22h 37m
2 stops
ONT21:07Ontario
2 Mar
ONT07:30Ontario
19h 00m
1 stop
LHR10:30London Heathrow
£427
Find similar
Delta
3 Feb
LHR12:30London Heathrow
16h 37m
1 stop
ONT21:07Ontario
19 Feb
ONT13:00Ontario
14h 40m
1 stop
LHR11:40London Heathrow
£438
Find similar
Delta
10 Jan
LHR15:05London Heathrow
15h 24m
1 stop
ONT22:29Ontario
19 Feb
ONT13:09Ontario
14h 31m
1 stop
LHR11:40London Heathrow
£439
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 2 November 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 26/2

06:30-22:38

2 stops24h 08m

Ontario

Mon 2/3

13:00-06:55

2 stops33h 55m

£424

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

10:00-22:38

2 stops44h 38m

Ontario

Mon 2/3

13:00-10:00

1 stop13h 00m

£425

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/2

06:30-21:07

2 stops22h 37m

Ontario

Mon 2/3

07:30-10:30

1 stop19h 00m

£427

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 3/2

12:30-21:07

1 stop16h 37m

Ontario

Thu 19/2

13:00-11:40

1 stop14h 40m

£438

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/3

14:45-22:38

1 stop14h 53m

Ontario

Sat 4/4

13:00-09:50

1 stop12h 50m

£446

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Thu 26/3

14:45-22:38

1 stop14h 53m

Ontario

Mon 30/3

13:00-09:50

1 stop12h 50m

£446

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Wed 3/12

08:30-22:49

2 stops22h 19m

Ontario

Wed 24/12

13:40-08:30

2 stops34h 50m

£493

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/12

11:45-19:41

1 stop15h 56m

Ontario

Mon 22/12

14:42-10:00

1 stop35h 18m

£494

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 2/12

10:05-17:37

1 stop15h 32m

Ontario

Tue 9/12

13:50-12:00

1 stop14h 10m

£495

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 10/2

15:00-22:48

1 stop15h 48m

Ontario

Tue 3/3

15:19-12:15

1 stop12h 56m

£496

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 £436. 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 £452.

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 £500. 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 £578. 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 £489 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 £575.

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 £546 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 £413 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 24m.

  • 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 £285Free CancellationRating
7.6
1,335 reviews
Search Finnair flights
British AirwaysPriceFrom £388Free CancellationRating
6.7
7,494 reviews
Search British Airways flights
United AirlinesPriceFrom £394Free CancellationRating
7.4
8,993 reviews
Search United Airlines flights
KLMPriceFrom £402Free CancellationRating
7.7
1,404 reviews
Search KLM flights
Virgin AtlanticPriceFrom £421Free CancellationRating
7.5
671 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom £440Free CancellationRating
6.8
7,542 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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