£364 Cheap Flights from London (LGW) to Ontario Intl. Airport (ONT)

View £364 flight on Tue, 22 Sept 2026Opens in a new window

Flight 1

Popular airlines from Gatwick Airport (LGW) to Los Angeles - Ontario Intl. Airport (ONT)

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Cheap Flights from London (LGW) to Ontario Intl. Airport (ONT)

Prices were available within the past 7 days and start at £364 for one-way flights and £483 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Finnair
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£483 Return, found 2 days ago
£483
Return
found 2 days ago
Select Finnair flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £483 found 2 days ago
Iberia
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£488 Return, found 2 days ago
£488
Return
found 2 days ago
Select Iberia flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £488 found 2 days ago
British Airways
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£489 Return, found 2 days ago
£489
Return
found 2 days ago
Select British Airways flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £489 found 2 days ago
British Airways
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£490 Return, found 2 days ago
£490
Return
found 2 days ago
Select British Airways flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £490 found 2 days ago
Finnair
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£491 Return, found 2 days ago
£491
Return
found 2 days ago
Select Finnair flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £491 found 2 days ago
American Airlines
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£493 Return, found 2 days ago
£493
Return
found 2 days ago
Select American Airlines flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £493 found 2 days ago
Finnair
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£494 Return, found 2 days ago
£494
Return
found 2 days ago
Select Finnair flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £494 found 2 days ago
American Airlines
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£495 Return, found 2 days ago
£495
Return
found 2 days ago
Select American Airlines flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £495 found 2 days ago
Iberia
Wed, 23 Sept - Mon, 28 Sept
LGW
London
ONT
Ontario
£496 Return, found 2 days ago
£496
Return
found 2 days ago
Select Iberia flight, departing Wed, 23 Sept from London to Ontario, returning Mon, 28 Sept, priced at £496 found 2 days ago
Virgin Atlantic
Sun, 11 Oct - Tue, 20 Oct
LGW
London
ONT
Ontario
£505 Return, found 1 day ago
£505
Return
found 1 day ago
Select Virgin Atlantic flight, departing Sun, 11 Oct from London to Ontario, returning Tue, 20 Oct, priced at £505 found 1 day ago

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city centre is 42 minutes. Flights from £888
SNA
John Wayne
Average driving time to city centre42 min
Flights from £888

Frequently asked questions

Which airlines fly direct from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Enter LGW to ONT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
To find a cheap flight from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
There are approximately 7 connecting flights per day from London (LGW-Gatwick) (LGW) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) (ONT). Some common connection points include Roissy-Charles de Gaulle (CDG), Keflavik Intl. (KEF), and Unknown (ZRH).
What is the earliest flight from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from LGW to ONT. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
How long does it take to fly from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Flying from LGW to ONT with a connection usually takes about 21 hours 20 minutes, traveling roughly 5,434 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
Select the "Business class" and "First class" filters when looking for LGW to ONT flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight with Expedia?
It's easy to earn miles on a London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Is it cheaper to buy a plane ticket from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) at the last minute?
Typically, booking a last minute flight from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package?
Securing a London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.)?
If you booked your London (LGW-Gatwick) to Ontario, CA (ONT-Los Angeles - Ontario Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Gatwick
Destination airport
Ontario Intl. Airport
Airlines serving
Air France, American Airlines, British Airways, Delta, Iberia, JetBlue Airways, KLM
Return price
£483
Distance
8693 km

Book with confidence

Compare flights from London to Ontario Intl. Airport easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from London to Ontario Intl. Airport. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Ontario Intl. Airport in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Gatwick to Ontario Intl. Airport.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Gatwick (LGW) to Ontario Intl. Airport (ONT)

The easiest way to view the best deals on flights from London to Ontario Intl. Airport today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Gatwick to Ontario Intl. Airport start at just £483 and range up to £505.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near London and Ontario Intl. Airport
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your London to Ontario Intl. Airport flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Gatwick to Ontario Intl. Airport for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from London to Ontario Intl. Airport easily and book with confidence

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