Cheap Flights from London Gatwick to Ontario International

Compare London Gatwick to Ontario International flight deals

Find the cheapest month or even day of the year to fly to Ontario International

Book the best Ontario International fare with no extra fees

Flight deals from London Gatwick to Ontario International

Looking for a cheap last-minute deal or the best return flight from London Gatwick to Ontario International? Find the lowest prices on one-way and return tickets right here.

Ontario.$939 per passenger.Departing Wed, 9 Sep, returning Thu, 24 Sep.Return flight with Delta.Outbound indirect flight with Delta, departs from London Gatwick on Wed, 9 Sep, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Thu, 24 Sep, arriving in London Gatwick.Price includes taxes and charges.From $939, select.

Ontario.$1,010 per passenger.Departing Wed, 1 Apr, returning Tue, 7 Apr.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Wed, 1 Apr, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Tue, 7 Apr, arriving in London Gatwick.Price includes taxes and charges.From $1,010, select.

Ontario.$1,027 per passenger.Departing Fri, 1 May, returning Fri, 8 May.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Fri, 1 May, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Fri, 8 May, arriving in London Gatwick.Price includes taxes and charges.From $1,027, select.

Ontario.$1,182 per passenger.Departing Wed, 29 Apr, returning Fri, 8 May.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Wed, 29 Apr, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Fri, 8 May, arriving in London Gatwick.Price includes taxes and charges.From $1,182, select.

Ontario.$1,357 per passenger.Departing Mon, 2 Mar, returning Wed, 1 Apr.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Mon, 2 Mar, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Wed, 1 Apr, arriving in London Gatwick.Price includes taxes and charges.From $1,357, select.

Ontario.$1,481 per passenger.Departing Mon, 9 Feb, returning Tue, 24 Feb.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Mon, 9 Feb, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Tue, 24 Feb, arriving in London Gatwick.Price includes taxes and charges.From $1,481, select.

Ontario.$1,510 per passenger.Departing Fri, 15 May, returning Mon, 1 Jun.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Fri, 15 May, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Mon, 1 Jun, arriving in London Gatwick.Price includes taxes and charges.From $1,510, select.

Ontario.$1,656 per passenger.Departing Mon, 23 Feb, returning Tue, 31 Mar.Return flight with Iberia.Outbound indirect flight with Iberia, departs from London Gatwick on Mon, 23 Feb, arriving in Ontario International.Inbound indirect flight with Iberia, departs from Ontario International on Tue, 31 Mar, arriving in London Gatwick.Price includes taxes and charges.From $1,656, select.

Find the cheapest month to fly from London Gatwick to Ontario International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Gatwick to Ontario International flights are currently cheapest in September.

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

London Gatwick to Ontario International: Alternative routes

Compare routes from London Gatwick to Ontario below. You may find an airport to fly into that's cheaper, faster, or easier than Ontario International.

London to Ontario: Flight information

The things to know before you go.

Cheapest flight found	$936
Cheapest month to fly	September

Finding cheap flights from London Gatwick to Ontario International: Frequently asked questions

How much are return flights from London Gatwick to Ontario International?

The best price we found for a return flight from London Gatwick to Ontario International is $939. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

Which airlines fly direct from London Gatwick to Ontario International?

Currently, there are no airlines that fly direct from London Gatwick to Ontario International. But we found flights with one or more stops from $936.

How many flights are there a week from London Gatwick to Ontario International?

As of February 2026, there are no flights flying from London Gatwick to Ontario International.

When is the cheapest time to fly from London Gatwick to Ontario International?

The cheapest month to fly from London Gatwick to Ontario International is usually September.

Which upcoming date is cheapest to fly from London Gatwick Airport to Ontario International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Gatwick Airport to Ontario International Airport on Wednesday, 9 September 2026.

Can I get a direct flight from London Gatwick Airport to Ontario International Airport?

No airlines currently offer direct flights between London Gatwick Airport and Ontario International Airport. Most routes have one or more stops.

How can I find the best flight deal to Ontario International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Ontario International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Ontario?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from London Gatwick Airport to Ontario International with?

Currently, Delta offers the cheapest flight tickets to Ontario International.

Travelling from London Gatwick Airport (LGW) to Ontario International Airport (ONT): what you need to know

Ontario is seven hours behind London and is in the UTC-7 timezone.
Leave enough time to catch your LGW to ONT flight. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.
You can expect bigger queues during popular months such as August. Arriving up to four hours in advance for an international flight and two hours for domestic departures is a smart move.
Explore another city along the way or simply break up your flight with a stopover. Just uncheck 'Direct flights only' to see your options when searching for tickets from London Gatwick Airport to Ontario International Airport. Many travellers pass through Harry Reid Airport (formerly McCarran Airport) on this route.

How to find the cheapest flights from London Gatwick Airport (LGW) to Ontario International Airport (ONT)

At the moment, $770 is the cheapest price we've seen for a one-way London Gatwick Airport to Ontario International Airport flight. The best price for a return ticket is $939. Keep in mind that fares could change due to demand at the time of booking.
It's usually smart to book in advance if you're looking for cheap tickets from LGW to ONT. That's because airlines adjust prices based on demand, which tends to rise closer to departure.
Finding cheap flights from London Gatwick Airport to Ontario International Airport is easy if you can be flexible with your dates. Use the 'Whole month' function to see the lowest prices across every month and snap up a great deal.
There's no need to check every day to see if fares have gone down when you create a Price Alert. We'll notify you as soon as a special offer becomes available on cheap flights from LGW to ONT.
Secure the perfect flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from London Gatwick Airport to Ontario International Airport, use the 'Sort by' tool. You can also filter results by departure and arrival times, airline, and number of stops.

Handy information about London Gatwick Airport (LGW)

When it comes to London Gatwick Airport's on-time performance, 69.26% of flights arrive within the scheduled timeframe.
Central London to London Gatwick Airport is approximately 80 kilometres. Depending on traffic, it'll take about 1 hour 20 minutes to get there if you're driving, ride-sharing or catching a cab.
Catching public transport? You can expect a journey time of around 1 hour 25 minutes.
Get your journey off to a stress-free start by staying near LGW. Whether you've booked an early flight from London Gatwick Airport to Ontario International Airport or just don't like being rushed, these stays are ideal:

Arriving at Ontario International Airport (ONT)

The last thing you want is a lengthy journey to your hotel if you're arriving on a late London Gatwick Airport to Ontario International Airport flight. Book one of these accommodation options near ONT instead:
Pick up an Ontario International Airport rental car and explore Ontario and beyond with your own set of wheels. Dollar, Fox - Rent A Car and Thrifty are well-known companies you can book with here.
Lock in the best deal by booking your vehicle from Ontario International Airport about three weeks before your trip.

Getting from Ontario International Airport (ONT) to central Ontario

The address for ONT is 2900 E. Airport Drive.
Ontario International Airport is approximately 6 kilometres from central Ontario. The drive time takes about 10 minutes.
Travelling to the centre by public transport takes roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

The quietest month for a flight from London Gatwick Airport to Ontario International Airport is May, while August is the most popular. Pick the best time to visit Ontario based on whether you prefer a bustling atmosphere or a more laid-back vibe.
Before locking in your flight from London Gatwick Airport to Ontario International Airport, consider the kind of weather you like. August is the warmest month in Ontario, with temperatures ranging from 15ºC to 35ºC.
For cooler conditions, search for a cheap ticket from LGW to ONT in January. Temperatures average between 4ºC and 23ºC then.

Explore more of United States

Ontario has plenty to offer, but there are so many other parts of United States you should also see. Around 56 kilometres west of Ontario, a visit to Los Angeles will fill your itinerary to the brim. Start with leading attractions like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.
Around 153 kilometres south of Ontario, San Diego is another favourite stop in United States. No visit is complete without checking out San Diego Zoo, USS Midway Museum and SeaWorld San Diego.