A building with a neon sign that reads "I ♥ THIS" and a sign above the entrance that says "TOBY KIRK'S".

£340 Cheap Flights to Ontario

View £340 flight on Wed, 16 Sept 2026Opens in a new window

Popular airlines to Ontario

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 25% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to Ontario

Prices were available within the past 7 days and start at £340 for one-way flights and £440 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Tue, 15 Dec - Wed, 30 Dec
LHR
London
ONT
Ontario
£440 Return, found 3 hours ago
£440
Return
found 3 hours ago
Select Swiss International Air Lines flight, departing Tue, 15 Dec from London to Ontario, returning Wed, 30 Dec, priced at £440 found 3 hours ago
Lufthansa
Mon, 26 Oct - Tue, 3 Nov
LHR
London
SNA
Orange County
£445 Return, found 1 day ago
£445
Return
found 1 day ago
Select Lufthansa flight, departing Mon, 26 Oct from London to Orange County, returning Tue, 3 Nov, priced at £445 found 1 day ago
United
Wed, 23 Dec - Wed, 30 Dec
LHR
London
SNA
Orange County
£451 Return, found 2 hours ago
£451
Return
found 2 hours ago
Select United flight, departing Wed, 23 Dec from London to Orange County, returning Wed, 30 Dec, priced at £451 found 2 hours ago
Brussels Airlines
Tue, 22 Sept - Sat, 10 Oct
LHR
London
SNA
Orange County
£461 Return, just found
£461
Return
just found
Select Brussels Airlines flight, departing Tue, 22 Sept from London to Orange County, returning Sat, 10 Oct, priced at £461 just found
Air France
Thu, 19 Nov - Thu, 26 Nov
LHR
London
ONT
Ontario
£461 Return, found 10 hours ago
£461
Return
found 10 hours ago
Select Air France flight, departing Thu, 19 Nov from London to Ontario, returning Thu, 26 Nov, priced at £461 found 10 hours ago

Frequently asked questions

What is the name of Ontario's airport?
Ontario is served by more than one airport, but most visitors choose to touch down at John Wayne Airport (SNA).
How far is John Wayne Airport (SNA) from central Ontario?
SNA is 48 kms (30 miles) from downtown Ontario, so expect a bit of a commute into the city centre.
What airport is best to fly into Ontario?
With a range of airports in one place, travellers are spoiled when flying into Ontario. If you touchdown at SNA, you'll be 48 kms (30 miles) from the downtown area. There's also Los Angeles - Ontario Intl. Airport (ONT) (5 kms (3 miles) away) and LGB (56 kms (35 miles) away).
How many airlines fly to Ontario?
Ontario is serviced by 16 air carriers from at least 46 worldwide airports.
Which airlines fly to Ontario?
Southwest Airlines, American Airlines and Frontier Airlines fly the most frequently to Ontario. The majority of flights begin in Phoenix, with Southwest Airlines having the most services on this route.
How many nonstop flights are there to Ontario?
Organising an amazing Ontario getaway is easy when there are 1,614 nonstop flights each week to choose from.
Where are the most popular flights to Ontario departing from?
Travellers often depart from Phoenix, Las Vegas and Denver airports when going to Ontario.
How long is the flight to Ontario Airport?
If it's Phoenix you're departing, you'll be airborne for around 1 hour and 24 minutes before you touchdown in Ontario. Runway to runway from Las Vegas takes around 1 hour and 11 minutes and from Denver, the average flight time is 2 hours and 33 minutes.
How to book the cheapest flight to Ontario?
We've all come across those lucky jet-setters who manage to score wonderfully cheap plane tickets every time they fly. Would you like to know how to do it for your Ontario holiday? Don't wait until the last possible moment to lock in your flight. Another excellent way to score an unbeatable deal is to compare all options. If your destination has more than one airport, be sure to research the cost of flying into a smaller terminal. Last but not least, another simple way to save some cash is be ready to book fast. If you stumble on an amazing deal, don't think twice — snap it up while you can.
Do you have any tips for my flight to Ontario?
If you're poorly prepared, air travel can be daunting. But there's no need to worry. Follow these handy hints and enjoy a comfortable start to your time in Ontario. What to pack in your hand luggage:

  • A plane trip can be a cruisy experience if you bring the right things. First of all you'll need toiletry items, such as deodorant, toothpaste and a toothbrush, a fresh change of clothes and a good read. Next, find a spot in your hand luggage for your phone, tablet and chargers, your important medications and maybe a blow-up neck pillow as well. Lastly, remember to take your passport, travel documents and your credit cards.

Do not pack the following items in your hand luggage:

  • While the list of restricted items can differ between airlines, the general guide to follow is nothing sharp, flammable or explosive. This includes things like screwdrivers, pocket knives, spray paint and fireworks. Sporting equipment like ski poles, and items that could injure passengers, such as firearms and ammunition, won't be allowed on board either.

What to wear on a flight:

  • Your goal here is to feel as comfortable as possible. Choose a pair of slip-on shoes, dress in loose, natural fibers and remember to bring a sweater in case you get chilly in the cabin.
  • Caused by sustained periods of immobility, deep vein thrombosis (DVT) is a blood clot condition that can affect some passengers during long-haul flights. Reduce the risks by drinking water, keeping your feet and legs moving and wearing compression tights or socks.

How to get through airport security fast when flying to Ontario?
The secret is to be organised before you arrive at airport security. That way, you'll be boarding that plane to Ontario in next to no time. Follow these tips and get your holiday off to a flying start:

  • First things first. Your travel documents and ID will need to be inspected by airport security. Have them easily accessible so you don't hold up the line.
  • The X-ray machine comes next. Empty your pockets and remove anything that is likely to beep. This includes things like headphones or earphones, as well as bulky coats or jackets. They'll need to be placed on the conveyor belt for screening.
  • All electronic gadgets, including your phone and tablet, are also required to be scanned separately.
  • Remove all liquids and gels from your carry-on bag. They often need to be sent through the X-ray machine separately. Each product should be in a container no larger than 3.4 ounces (100 millilitres) and everything must fit in a quart-size (one litre), clear zip-lock bag.
  • The right choice of footwear can save you valuable minutes. Boots and heavy shoes are often required to be removed and X-rayed separately. Slip-on sneakers are usually not.
  • Sharp items such as knives and scissors are not allowed on board. They'll be seized at security, so pack them in your checked suitcase.

Book with confidence

Expedia flights to Ontario

Searching for cheap flights to Ontario? No travel company presents more choices than Expedia if you're looking to compare flights to Ontario. With more airlines, cheaper flights, fewer stops, and more departure and arrival times travellers should ensure they search on Expedia before any holiday to Los Angeles. Expedia provides the cheapest flights to many destinations in Los Angeles and you may find even greater savings if you combine your flight with a hotel stay in Ontario.

Expedia is the largest online travel agency which means that Expedia have access to cheap flights. So make sure you check Expedia regularly for these bargain flights because the cheapest airline tickets sell out fast.

Expedia is not only free for everyone to use but it quick and easy to use. Find the lowest flight prices guaranteed and book directly through Expedia. Browse through hundreds of cheap flight offers to find the one that suits your budget by simply inputting your travel dates. Expedia will then find the cheapest flights to Ontario for that period and let you choose your preferred time and airline. If you need additional assistance, Expedia Customer Service representatives are available from 8am - 10pm Monday to Friday, and 9am - 10pm at weekends. Our capable staff will be able to help you with any questions regarding your Ontario flight, or other booking questions that may arise. When you book flights with Expedia you can rest assured that you have booked the best flight at the lowest price.

Expedia flights to Ontario

Travel information

Destination airport
Ontario Intl. Airport
Destination airport IATA code
ONT
Destination city name
Ontario Intl. Airport
Return price
£439

Trending flights to Ontario

Prices were available within the past 7 days and start at £340 for one-way flights and £440 for round trip, for the period specified. Be sure to select the 'Direct flights only' box above if you are looking for a non stop route. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Tue, 15 Dec - Wed, 30 Dec
LHR
London
ONT
Ontario
£440 Return, found 3 hours ago
£440
Return
found 3 hours ago
Select Swiss International Air Lines flight, departing Tue, 15 Dec from London to Ontario, returning Wed, 30 Dec, priced at £440 found 3 hours ago

Explore a world of travel with Expedia

*Available to Expedia members.