Cheap Flights from Ontario Intl. Airport Airport (ONT)

View $28 flight on Sat, May 30, 2026Opens in a new window

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

  • Alaska Airlines

  • American Airlines

  • United

  • Delta

  • Southwest Airlines

  • Frontier Airlines

  • Volaris

Flights from Ontario Intl. Airport Airport

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 28 - Wed, Jun 3
ONT
Ontario
DEN
Denver
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, May 28 from Ontario to Denver, returning Wed, Jun 3, priced at $56 just found
Frontier Airlines
Wed, May 27 - Sat, May 30
ONT
Ontario
LAS
Las Vegas
$56 Roundtrip, just found
$56
Roundtrip
just found
Select Frontier Airlines flight, departing Wed, May 27 from Ontario to Las Vegas, returning Sat, May 30, priced at $56 just found
Frontier Airlines
Sat, May 30 - Mon, Jun 1
ONT
Ontario
LAS
Las Vegas
$66 Roundtrip, just found
$66
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, May 30 from Ontario to Las Vegas, returning Mon, Jun 1, priced at $66 just found
Frontier Airlines
Thu, May 28 - Wed, Jun 3
ONT
Ontario
SFO
San Francisco
$66 Roundtrip, found 2 hours ago
$66
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, May 28 from Ontario to San Francisco, returning Wed, Jun 3, priced at $66 found 2 hours ago
Frontier Airlines
Mon, Jun 1 - Thu, Jun 4
ONT
Ontario
DEN
Denver
$69 Roundtrip, found 6 hours ago
$69
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Mon, Jun 1 from Ontario to Denver, returning Thu, Jun 4, priced at $69 found 6 hours ago
Frontier Airlines
Mon, Jun 1 - Wed, Jun 10
ONT
Ontario
DEN
Denver
$72 Roundtrip, found 3 hours ago
$72
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Mon, Jun 1 from Ontario to Denver, returning Wed, Jun 10, priced at $72 found 3 hours ago
Southwest Airlines
Mon, Jun 8 - Thu, Jun 11
ONT
Ontario
SEA
Seattle
$107 Roundtrip, found 2 hours ago
$107
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Mon, Jun 8 from Ontario to Seattle, returning Thu, Jun 11, priced at $107 found 2 hours ago
American Airlines
Tue, Jun 2 - Wed, Jun 3
ONT
Ontario
PHX
Phoenix
$137 Roundtrip, found 3 hours ago
$137
Roundtrip
found 3 hours ago
Select American Airlines flight, departing Tue, Jun 2 from Ontario to Phoenix, returning Wed, Jun 3, priced at $137 found 3 hours ago
United
Tue, Jun 2 - Wed, Jun 3
ONT
Ontario
SFO
San Francisco
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Jun 2 from Ontario to San Francisco, returning Wed, Jun 3, priced at $137 found 1 hour ago
Delta
Thu, Jun 4 - Mon, Jun 8
ONT
Ontario
DEN
Denver
$197 Roundtrip, just found
$197
Roundtrip
just found
Select Delta flight, departing Thu, Jun 4 from Ontario to Denver, returning Mon, Jun 8, priced at $197 just found

Frequently asked questions

What are the cheapest places to fly from Los Angeles - Ontario Intl. Airport (ONT)?
Expedia can help you take to the skies for less with our cheap DEN flights from $28 from Los Angeles - Ontario Intl. Airport (ONT).* Scroll up to find some of the cheapest flights from ONT here on this page. Or, if you're eager for an impromptu trip that won't break the bank, our flight deals offer plenty of ideas for a budget-friendly break.*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.
How to find cheap flights from ONT with Expedia?
You've come to the right place for cheap flights from Los Angeles - Ontario Intl. Airport (ONT). To lock in the best prices, stay flexible with your dates. After choosing your destination, click on the dates to see the cheapest flights from ONT throughout the month. You can also sort the results by "Price (lowest to highest)."
Does Los Angeles - Ontario Intl. Airport (ONT) have international flights?
There are 24 international flights from Los Angeles - Ontario Intl. Airport (ONT) per week. Well-known destinations include Guadalajara, Taoyuan City and San Salvador, so grab your passport and get packing!
What is the airport code for Los Angeles - Ontario Intl. Airport (ONT)?
The three-letter airport code for Los Angeles - Ontario Intl. Airport (ONT) is ONT.
Where can you fly to from ONT?
Select from 19 destinations from Los Angeles - Ontario Intl. Airport (ONT) when flying domestically. Some of the popular ones include:

  • Phoenix
  • Denver
  • Dallas
  • San Francisco
  • Las Vegas

Pick from 4 international destinations from Los Angeles - Ontario Intl. Airport (ONT) and see more of what the world has to offer. Guadalajara and Taoyuan City are the top routes from this airport.
Which airlines fly out of Los Angeles - Ontario Intl. Airport (ONT)?
You'll have multiple airlines from Los Angeles - Ontario Intl. Airport (ONT) to select from. These include:

  • Southwest Airlines (WN)
  • American Airlines (AA)
  • United Airlines (UA)
  • Delta Air Lines (DL)
  • Alaska Airlines (AS)

How many flights per day depart from ONT?
Every day, there's an average of 65 departure flights from Los Angeles - Ontario Intl. Airport (ONT).
How many terminals are there in Los Angeles - Ontario Intl. Airport (ONT) and how early should I arrive before my flight?
With 2 terminals, Los Angeles - Ontario Intl. Airport (ONT) isn't too tricky to find your way around. Still, it pays to investigate exactly where you'll be departing from — 2 or 4. Check the details on your booking or contact your airline directly before you head off. Get your trip off to a good start by arriving two hours in advance of domestic flights. For international flights, you'll want to arrive three hours before your departure time. Both recommendations allow for potential holdups at security or customs, time needed to check in bags and finding your gate.
How far is ONT from central Ontario?
ONT is located about 4 mi east of central Ontario. If you're traveling by car or ride-share, expect it to take 10 minutes or so to arrive at the terminal, depending on traffic conditions. Public transportation takes about 1 hour and 28 minutes. Be sure to factor in enough travel time for unforeseen delays.
Does Los Angeles - Ontario Intl. Airport (ONT) have a hotel?
Avoid the stress of a last-minute rush to the airport by checking in to SpringHill Suites by Marriott Ontario Airport/Rancho Cucamonga, 1 mi from ONT. This comfy getaway has a swimming pool and a terrace. Best Western Plus Ontario Airport & Convention Center is another handy choice, especially if you've booked an early flight from Los Angeles - Ontario Intl. Airport (ONT). It features a swimming pool and premium bedding and is only 1 mi away.
Are there lounges in Los Angeles - Ontario Intl. Airport (ONT)?
Chill out or finish up some work before your flight from ONT in a comfy airport lounge. Typically, access is reserved for first-class or business passengers and frequent flyers with airlines from Los Angeles - Ontario Intl. Airport (ONT). If you're not eligible, you may be able to purchase a one-day pass for entry. Visit the airport's website for more information.
What is an alternative airport to Los Angeles - Ontario Intl. Airport (ONT)?
John Wayne Airport (SNA) is a convenient alternative to Los Angeles - Ontario Intl. Airport (ONT). This hub is located 30 mi from ONT.
What is the cancellation policy on flights and how do I cancel my flight on Expedia?
You may be able to cancel your flight from ONT free of charge within 24 hours of booking. However, some flights are nonrefundable, and you could receive a flight credit from the airline for a future trip. For more information, refer to the terms and conditions of your booking, or visit our Customer Service Portal.

Travel information

Ontario Intl. Airport Airport Information

Cheap flights from Ontario Intl. Airport Airport will take you to an array of ever-popular vacation destinations without putting a big dent in that all-important vacation budget. This means plenty more spending money for when you get to your desired location. You can easily browse for potential airlines and routes, whether direct flights or indirect itineraries, with the user-friendly listings on Expedia. After inputting your preferred dates and times, multiple carriers will be clearly laid out, so you can see if your preferred airline flies from Ontario Intl. Airport Airport, or whether another departure point would potentially suit you better. By using Expedia to compare the rates and flight times available, you can ensure you bag the best possible travel deal from Ontario Intl. Airport Airport, ONT, or any other airport. After that’s all arranged, you can relax in the knowledge that your flight plans are in place, and get on with the exciting preparations for your trip.


Getting to Ontario Intl. Airport Airport

There will be a number of options when it comes to getting to Ontario Intl. Airport Airport. Intending to drive with your own set of wheels from Ontario Intl. Airport or further afield? Check the airport website, or online maps, to find out the easiest and quickest way to get here. You can also look into taxi options and prices for getting to Ontario Intl. Airport Airport. Prefer the idea of getting to the airport on board a bus or coach? Check beforehand to be sure of exactly where you’ll be stopping in relation to the main part of the airport itself, and how long you’ll need to factor in to get to baggage check-in.


Things to consider when flying from Ontario Intl. Airport, ONT

Intending to pick up some vacation bits and pieces before jetting off? It’s useful to look at the Ontario Intl. Airport Airport website to see exactly what shops are available to travelers, so you know you’re covered for cosmetics, clothes, and accessories. This will also let you know what kind of eateries are on offer – after all, bars and restaurants are great places to chill out in the lead-up to the flight and have a light snack or hearty meal to satisfy everyone in your travel party. If you’re coming back to Ontario Intl. Airport after your trip, it’s well worth researching return routes and timetables, depending on what form of transportation you’ll be using. Remember that researching flights from Ontario Intl. Airport ONT Airport thoroughly ahead of time through Expedia could save you plenty of money if you book the trip well in advance.
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