$43 Cheap Flights from Denver (DEN) to Ontario (ONT)

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Cheap Flights from Denver Intl. to Los Angeles - Ontario Intl.

Prices were available within the past 7 days and starts at $43 for one-way flights and $86 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
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Flight from Denver to Ontario route information
Origin AirportDenver Intl.
Destination AirportLos Angeles - Ontario Intl.
Airlines ServingAlaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, United
Flight Price$86
Distance816 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 $43 now!

Frequently asked questions

How much is a flight from Denver Intl. Airport (DEN) to Los Angeles - Ontario Intl. Airport (ONT)?
Start packing your suitcase, because round-trip journeys from Denver Intl. Airport (DEN) to Ontario Airport start from $86. That’s based on airfares listed within the last 7 days on Expedia for flights departing within the next year. Prices can increase quickly, so book now to score the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT)?
Every air carrier has its own set of terms and conditions. If you do decide to cancel, follow the simple instructions on our Customer Service Portal.
How do I find cheap flights from Denver Airport to ONT that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for DIA airport to Ontario Airport flights, you’ll see a “no change fees” filter for you to select.
How many hours is the flight from DIA airport to Los Angeles - Ontario Intl. Airport (ONT)?
Put your seat back, pick a movie and 2 hours and 18 minutes will whiz by in a jiffy. That’s how long it takes to travel to Ontario Airport (ONT) from DEN (DEN).
How far is the flight from Denver Airport to ONT?
That movie you’ve been desperate to see will just have to wait — the flight distance between Denver Intl. Airport (DEN) (DEN) and ONT (ONT) is only 808 mi (1,300 km). The captain will be telling you to put your seat upright for landing before you know it.
Which airlines fly direct from Denver Intl. Airport (DEN) to Ontario Airport?
Southwest Airlines (WN) is one of the preferred choices for many travelers flying between DEN and Ontario Airport. Select from the 104 flights it operates on this route each month. Love some more options? Check out what’s available with United Airlines (UA). This carrier offers 56 fights monthly between these airports.
Are Denver Airport to Ontario Airport flight tickets cheaper when they're purchased at the last minute?
Last-minute planners can occasionally find a bargain, with some super cheap airfares from Denver Airport to Ontario Airport showing up a few weeks prior to the departure date. If you’d rather book ahead of time, Expedia compares and updates all the best flight deals frequently — as early as 12 months in advance in some cases. It depends on the carrier though, as not every airline advertises prices that far in advance.
Can I fly from DEN to Ontario Airport right now?
To see what travel restrictions and quarantine requirements are in place for different citizens flying from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT) please visit our COVID 19 travel advisor portal link
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