Cheap Flights from Ontario Intl. Airport Airport (ONT)

View AU$137 flight on Sat, 5 Dec 2026Opens in a new window

Popular airlines from Ontario Intl. Airport (ONT)

  • Alaska Airlines

  • United

  • American Airlines

  • Delta

  • Frontier Airlines

  • Southwest Airlines

  • Volaris

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Flights from Ontario Intl. Airport Airport

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, 24 Oct - Sat, 7 Nov
ONT
Ontario
SEA
Seattle
AU$252 Return, found 16 hours ago
AU$252
Return
found 16 hours ago
Select Frontier Airlines flight, departing Sat, 24 Oct from Ontario to Seattle, returning Sat, 7 Nov, priced at AU$252 found 16 hours ago
Frontier Airlines
Sat, 24 Oct - Fri, 6 Nov
ONT
Ontario
SEA
Seattle
AU$266 Return, found 16 hours ago
AU$266
Return
found 16 hours ago
Select Frontier Airlines flight, departing Sat, 24 Oct from Ontario to Seattle, returning Fri, 6 Nov, priced at AU$266 found 16 hours ago
American Airlines
Wed, 14 Oct - Sat, 24 Oct
ONT
Ontario
PHX
Phoenix
AU$272 Return, found 4 days ago
AU$272
Return
found 4 days ago
Select American Airlines flight, departing Wed, 14 Oct from Ontario to Phoenix, returning Sat, 24 Oct, priced at AU$272 found 4 days ago
Frontier Airlines
Thu, 22 Oct - Fri, 6 Nov
ONT
Ontario
SEA
Seattle
AU$279 Return, found 16 hours ago
AU$279
Return
found 16 hours ago
Select Frontier Airlines flight, departing Thu, 22 Oct from Ontario to Seattle, returning Fri, 6 Nov, priced at AU$279 found 16 hours ago
Frontier Airlines
Wed, 28 Oct - Fri, 6 Nov
ONT
Ontario
SEA
Seattle
AU$287 Return, found 16 hours ago
AU$287
Return
found 16 hours ago
Select Frontier Airlines flight, departing Wed, 28 Oct from Ontario to Seattle, returning Fri, 6 Nov, priced at AU$287 found 16 hours ago
Frontier Airlines
Sun, 25 Oct - Fri, 6 Nov
ONT
Ontario
SEA
Seattle
AU$302 Return, found 16 hours ago
AU$302
Return
found 16 hours ago
Select Frontier Airlines flight, departing Sun, 25 Oct from Ontario to Seattle, returning Fri, 6 Nov, priced at AU$302 found 16 hours ago
American Airlines
Sat, 14 Nov - Tue, 17 Nov
ONT
Ontario
LAS
Las Vegas
AU$325 Return, found 3 days ago
AU$325
Return
found 3 days ago
Select American Airlines flight, departing Sat, 14 Nov from Ontario to Las Vegas, returning Tue, 17 Nov, priced at AU$325 found 3 days ago
United
Wed, 26 Aug - Sat, 12 Sept
ONT
Ontario
LAS
Las Vegas
AU$414 Return, found 5 days ago
AU$414
Return
found 5 days ago
Select United flight, departing Wed, 26 Aug from Ontario to Las Vegas, returning Sat, 12 Sept, priced at AU$414 found 5 days ago
Delta
Sat, 29 Aug - Sat, 19 Sept
ONT
Ontario
DAL
Dallas
AU$431 Return, found 5 days ago
AU$431
Return
found 5 days ago
Select Delta flight, departing Sat, 29 Aug from Ontario to Dallas, returning Sat, 19 Sept, priced at AU$431 found 5 days ago
Alaska Airlines
Tue, 22 Dec - Fri, 25 Dec
ONT
Ontario
PDX
Portland
AU$431 Return, found 16 hours ago
AU$431
Return
found 16 hours ago
Select Alaska Airlines flight, departing Tue, 22 Dec from Ontario to Portland, returning Fri, 25 Dec, priced at AU$431 found 16 hours ago

Frequently asked questions

What is the airport code for Los Angeles - Ontario Intl. Airport (ONT)?
Los Angeles - Ontario Intl. Airport (ONT) uses the airport code: ONT.
How many terminals are there in Ontario Airport and how early should I arrive before my flight?
You'll find flights operating out of 2 terminals at Ontario Airport. A few days before you travel, check your ticket or contact your airline to confirm whether you'll be leaving from 2 or 4. For domestic flights, it's recommended to arrive 1.5-2 hours before your departure time. If you're travelling internationally, arrive 2-3 hours in advance to allow ample time for checking bags, security lines and locating your gate.
Does Ontario Airport have a hotel?
ONT doesn't have any hotels in the immediate surrounds, but that doesn't mean all is lost. You're sure to find someplace comfortable to stay before you jet off if you broaden your search. Only a brief cab ride from the terminals, the Hotel d'Lins Ontario Airport might be exactly what you're looking for. It offers a swimming pool, a garden and free internet services. The Ontario Airport Hotel & Conference Centre is also close by. Here you can use mountain views, a cafe and a swimming pool. With convenient options like these, you definitely won't need to sleep on the airport floor if you're flying out early.
Are there private lounges in Los Angeles - Ontario Intl. Airport (ONT)?
Yes, Los Angeles - Ontario Intl. Airport (ONT) offers passengers at least one private lounge. Find out the types of amenities provided and your eligibility for access by checking the airport's website.
What airlines fly out of Ontario Airport?
You have plenty of choices when flying out of ONT with these reliable domestic carriers:

  • American Airlines
  • Frontier Airlines
  • Delta Air Lines

Cross a new country off your travel bucket list with China Airlines. This leading international airline has flights out of Los Angeles - Ontario Intl. Airport (ONT) and will have a destination that'll make you want to click the "book" button.
How many flights per day fly out of ONT?
Head for someplace new on one of the 75 flights that leave Los Angeles - Ontario Intl. Airport (ONT) each day. If you're about to plan your next great escape, look up this airport's destinations.
How to find cheap flights from ONT with Expedia?
The cheapest one-way flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) was to San Francisco (SFO) at AU$137. One of the simplest ways to find a cheap flight with Expedia is to enter your preferred dates and destination, and then sort your results by price. These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply. You'll always snag a real bargain with Expedia, but our "Flexible dates" tool makes it that extra bit easier. First, enter your destination and flight dates. Then, click on "Flexible dates" above the search results to browse the cheapest prices for days surrounding your trip. If you want to narrow your search, you can filter by airline preference, specific departure and arrival times and more.
Where can you fly to from Los Angeles - Ontario Intl. Airport (ONT)?
From Los Angeles - Ontario Intl. Airport (ONT), a large number of people venture to Taipei. You'll be in good company if you plan on taking a trip to this popular destination. Many domestic travellers jet to Phoenix, Dallas or Las Vegas. Compare the fares, find impressive deals and secure your dream getaway for less.
What is the cancellation policy on flights and how do I cancel my flight on Expedia?
Most flights are free to cancel within 24 hours of making the reservation. However, some flights are non-refundable, and you may receive a flight credit from the airline to use for a future booking. For more information, please visit our Customer Service Portal.

Travel information

Ontario Intl. Airport Airport Information

Airport Name
Airport Location
Airport Code
Latitude
Longitude
Altitude
LA/Ontario International AirportOntario, USAIATA: ONT, ICAO: ONT34.056000-117.600998287.73 meters

Ontario Airport is also known by its International Air Transport Association code as ONT Airport and is located in the city of Ontario. Flights are handled by 15 airlines offering both international and domestic travel. The most common airline flying in and out of Ontario is Southwest Airlines with 1,394 Ontario flights every month! Check out our helpful LA/Ontario International Airport information, including individual terminal maps and local weather information. It’s everything you need to book cheap Ontario flights for your next business trip or holiday!

Explore a world of travel with Expedia

*Available to Expedia members.