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Cheap flights from London Heathrow Airport to Los Angeles from £410

This is the cheapest return 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 13/9. 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

British Airways Logo
08:20 - 22:33LHR-ONT
22h 13m1 stop
British Airways Logo
12:47 - 12:45ONT-LHR
15h 58m1 stop
£410British Airways
Find Deal
Sat, 13 Sep - Sat, 20 Sep
British Airways Logo
14:55 - 22:42LHR-ONT
14h 47m1 stop
British Airways Logo
16:47 - 13:15ONT-LHR
12h 28m1 stop
£412British Airways
Find Deal
Tue, 28 Oct - Tue, 4 Nov
British Airways Logo
10:15 - 18:22LHR-ONT
16h 07m1 stop
British Airways Logo
08:48 - 08:15ONT-LHR
15h 27m1 stop
£414British Airways
Find Deal
Sun, 23 Nov - Sat, 6 Dec
Virgin Atlantic Logo
06:20 - 16:14LHR-ONT
17h 54m2 stops
Virgin Atlantic Logo
06:45 - 13:05ONT-LHR
22h 20m1 stop
£416Virgin Atlantic
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Sun, 23 Nov - Sat, 6 Dec
British Airways Logo
14:55 - 22:23LHR-ONT
15h 28m1 stop
British Airways Logo
17:09 - 13:15ONT-LHR
12h 06m1 stop
£416British Airways
Find Deal
Sun, 23 Nov - Sat, 6 Dec
Virgin Atlantic Logo
06:20 - 16:14LHR-ONT
17h 54m2 stops
Virgin Atlantic Logo
07:00 - 10:35ONT-LHR
19h 35m1 stop
£418Virgin Atlantic
Find Deal
Sun, 23 Nov - Sat, 6 Dec
American Airlines Logo
12:00 - 18:25LHR-ONT
14h 25m1 stop
American Airlines Logo
16:45 - 12:50ONT-LHR
12h 05m1 stop
£428American Airlines
Find Deal
Sun, 24 Aug - Tue, 9 Sep
KLM Logo
14:20 - 22:41LHR-ONT
16h 21m1 stop
KLM Logo
12:00 - 10:35ONT-LHR
14h 35m1 stop
£431KLM
Find Deal
Sun, 16 Nov - Mon, 24 Nov
American Airlines Logo
12:00 - 18:24LHR-ONT
14h 24m1 stop
American Airlines Logo
16:45 - 12:50ONT-LHR
12h 05m1 stop
£444American Airlines
Find Deal
Mon, 25 Aug - Tue, 9 Sep
Finnair Logo
16:25 - 23:59LHR-ONT
15h 34m1 stop
Finnair Logo
14:54 - 12:45ONT-LHR
13h 51m1 stop
£462Finnair
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Sun, 14 Sep - Tue, 30 Sep

Iberia flights from London Heathrow Airport to Ontario

Our best Iberia deals on London Heathrow Airport to Ontario flight tickets
Iberia
20 Sept
LHR06:15London Heathrow
20h 39m
2 stops
ONT18:54Ontario
3 Oct
ONT10:54Ontario
19h 31m
1 stop
LHR14:25London Heathrow
£437
Find similar
Iberia
13 Sept
LHR07:35London Heathrow
22h 58m
2 stops
ONT22:33Ontario
20 Sept
ONT10:53Ontario
19h 32m
1 stop
LHR14:25London Heathrow
£438
Find similar
Iberia
4 Oct
LHR07:35London Heathrow
22h 58m
2 stops
ONT22:33Ontario
18 Oct
ONT14:51Ontario
18h 24m
2 stops
LHR17:15London Heathrow
£449
Find similar

British Airways flights from London Heathrow Airport to Ontario

Our best British Airways deals on London Heathrow Airport to Ontario flight tickets
British Airways
13 Sept
LHR08:20London Heathrow
22h 13m
1 stop
ONT22:33Ontario
20 Sept
ONT12:47Ontario
15h 58m
1 stop
LHR12:45London Heathrow
£410
Find similar
British Airways
28 Oct
LHR14:55London Heathrow
14h 47m
1 stop
ONT22:42Ontario
4 Nov
ONT16:47Ontario
12h 28m
1 stop
LHR13:15London Heathrow
£412
Find similar
British Airways
23 Nov
LHR10:15London Heathrow
16h 07m
1 stop
ONT18:22Ontario
6 Dec
ONT08:48Ontario
15h 27m
1 stop
LHR08:15London Heathrow
£414
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 1 August 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

Sat 13/9

08:20-22:33

1 stop22h 13m

Ontario

Sat 20/9

12:47-12:45

1 stop15h 58m

£410

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Tue 28/10

14:55-22:42

1 stop14h 47m

Ontario

Tue 4/11

16:47-13:15

1 stop12h 28m

£412

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

10:15-18:22

1 stop16h 07m

Ontario

Sat 6/12

08:48-08:15

1 stop15h 27m

£414

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

06:20-16:14

2 stops17h 54m

Ontario

Sat 6/12

06:45-13:05

1 stop22h 20m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

14:55-22:23

1 stop15h 28m

Ontario

Sat 6/12

17:09-13:15

1 stop12h 06m

£416

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 23/11

06:20-16:14

2 stops17h 54m

Ontario

Sat 6/12

07:00-10:35

1 stop19h 35m

£418

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 24/8

12:00-18:25

1 stop14h 25m

Ontario

Tue 9/9

16:45-12:50

1 stop12h 05m

£428

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 16/11

14:20-22:41

1 stop16h 21m

Ontario

Mon 24/11

12:00-10:35

1 stop14h 35m

£431

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Mon 25/8

12:00-18:24

1 stop14h 24m

Ontario

Tue 9/9

16:45-12:50

1 stop12h 05m

£444

LondonOntario

LHR - ONT

LHRONT

London Heathrow

Sun 14/9

16:25-23:59

1 stop15h 34m

Ontario

Tue 30/9

14:54-12:45

1 stop13h 51m

£462

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 February is, on average, the cheapest month to fly to Ontario from London Heathrow Airport, with most prices found around £445. If you’re not able to fly to Ontario in February, then September is your next best option. Flight prices from London Heathrow Airport to Ontario during September average around £480.

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 £497. 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 £574. 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 £486 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 £571.

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 £536 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 £445 on momondo.

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

Best price found

£471

Fastest flight time

13h 59m

Direct flights

None

Airports in Ontario

1 airport
The best one-way flight to Ontario from London Heathrow Airport in the past 72 hours is £471. The best return flight deal from London Heathrow Airport to Ontario found on momondo in the last 72 hours is £410.
The fastest flight from London Heathrow Airport to Ontario takes 13h 59m
There are no direct flights from London Heathrow Airport to Ontario. Popular non-direct route for this connection is London Heathrow Airport - Ontario Airport.
There is 1 airport near Ontario: Ontario (ONT)
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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 59m.

  • 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 £283Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
British AirwaysPriceFrom £384Free CancellationRating
6.6
7,222 reviews
Search British Airways flights
KLMPriceFrom £400Free CancellationRating
7.8
1,383 reviews
Search KLM flights
United AirlinesPriceFrom £401Free CancellationRating
7.4
8,900 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom £422Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom £437Free CancellationRating
6.8
7,275 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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