$29 Cheap Flights from Denver (DEN) to Ontario (ONT)

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Cheap Flights from Denver to Ontario (DEN-ONT)

Prices were available within the past 7 days and start at $29 for one-way flights and $53 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Flights from Denver (DEN) to Ontario (ONT)
Origin airport
Denver Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Roundtrip price
$52
Distance
816 mi

Denver to Ontario Flights

Whether you’re looking for a grand adventure or just want to get away for a last-minute break, flights from Denver to Ontario offer the perfect respite. Not only does exploring Ontario provide the chance to make some magical memories, dip into delectable dishes, and tour the local landmarks, but the cheap airfare means you won’t bust your budget. So no matter whether your ideal itinerary involves flying one way, non-stop, or round trip, you’re bound to find flights that match your schedule on Expedia, and at prices that won’t shock your wallet.

Bagging a cheap flight from Denver to Ontario may mean more dollars to spend on for one-of-a-kind souvenirs when you arrive, but it doesn’t mean you have to skimp on your travel experience, as Expedia offers a sizzling selection of cheap airlines that’ll put you in your happy place on their planes, whether that’s getting lost in a hair-raising airport thriller, dreaming on the passing landscape over a glass of bubbly, or jotting down your vacation bucket list at 38,000 feet. There’s also bound to be plenty of opportunities to snap a few photos of the high life that will make your friends green with envy. After all, enjoying the journey is part of the fun.

With so many affordable flights and so many wonderful adventures awaiting you, there’s no reason to put off booking a fantastic flight from DEN to ONT today. So don’t leave it to the last minute to make your dream trip a reality: pack your bags with your go-to travel accessories, put together your list of must-see attractions and can’t-miss activities, and get ready to broaden your horizons – with Expedia, the wonders of Ontario are only a plane trip away. Book your travel arrangements with us today!

If you would like to book flights to Ontario more flexibly many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Ontario is $29 now!

Frequently asked questions

How long does it take to fly from DIA airport to ONT?
Purchase your ticket with United Airlines and you’ll be cruising the skies for about 2 hours and 19 minutes. This well-known airline has a direct flight that sets off at 11:16AM from DEN and gets to ONT at 12:35PM. Expedia has some amazing flight deals, so take a look at what’s available on this route today.
Is it cheaper to buy a plane ticket from DEN to Los Angeles - Ontario Intl. Airport (ONT) last minute?
Being the spontaneous type is a rewarding way to travel around, but it’s not necessarily the wisest method to nab a bargain flight. Think about booking your Denver Intl. Airport (DEN) to Ontario Airport trip ahead of time instead of leaving it till the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Leave your spontaneity for when you get to Ontario Airport!
What airline has the least delays from Denver Intl. Airport (DEN) to Ontario Airport?
With an on-time performance score of 75%, United Airlines is the carrier that’s most likely to fly you from DEN to ONT without any interruptions. Flight delays can be an excuse to linger longer at the airport bar. However, they can also cause you to miss a connection or even ruin your entire trip. You can keep updated by reviewing your flight status through the Expedia App long before you get to the airport. If you’re already there and the delay will significantly impact your plans, head to the customer service desk to discover what your options are.
What airports do you fly into for Los Angeles from Denver?
Los Angeles - Ontario Intl. Airport (ONT), John Wayne Airport (SNA) and Long Beach Municipal Airport (LGB) are your options when heading off from Denver to Los Angeles. Approximately 40 mi east of the heart of Los Angeles, Los Angeles - Ontario Intl. Airport (ONT) is the city’s principal gateway. Think about things such as flight arrival and departure times and the distance to your hotel before settling on an airport. University of Southern California and Hollywood Walk of Fame are a couple of awesome attractions to put on your to-do list when you arrive at your destination.
What are the most popular departure times for flights from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT)?
The most popular departure times for flights from DIA airport to ONT are between 11:00 AM - 12:00 PM on United Airlines. Our recommendation is to jet out in the morning. The earlier you leave, the better your chances of arriving on time with lighter air traffic in the sky.
Can I change the date of my flight from DIA airport to Ontario Airport?
Plans can get upended, so Expedia is here to help make things as simple as possible. To start, find your Denver Intl. Airport (DEN) to Los Angeles - Ontario Intl. Airport (ONT) itinerary through the Expedia Trips portal and look up the fare rules and conditions to see if you can make changes. If you booked in the last 24 hours, some carriers will let you cancel for free and organize new flights. If you booked your fare more than 24 hours ago, get in touch with us through our Customer Service portal to see how we can assist.
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