￥13,830 Cheap Flights from Denver (DEN) to Ontario (ONT)

View ￥13,830 flight on Tue, Feb 10, 2026Opens in a new window

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

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Cheap Flights from Denver to Ontario (DEN-ONT)

Prices were available within the past 7 days and start at ￥13,830 for one-way flights and ￥29,280 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Jan 31 - Sat, Feb 7
DEN
Denver
ONT
Ontario
￥29,280 Roundtrip, found 4 hours ago
￥29,280
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Jan 31 from Denver to Ontario, returning Sat, Feb 7, priced at ￥29,280 found 4 hours ago
Delta
Sat, Jan 31 - Sat, Feb 7
DEN
Denver
ONT
Ontario
￥30,780 Roundtrip, found 4 hours ago
￥30,780
Roundtrip
found 4 hours ago
Select Delta flight, departing Sat, Jan 31 from Denver to Ontario, returning Sat, Feb 7, priced at ￥30,780 found 4 hours ago
Delta
Wed, Feb 11 - Tue, Feb 17
DEN
Denver
ONT
Ontario
￥31,060 Roundtrip, found 2 days ago
￥31,060
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Feb 11 from Denver to Ontario, returning Tue, Feb 17, priced at ￥31,060 found 2 days ago
Alaska Airlines
Sat, Jan 31 - Sat, Feb 7
DEN
Denver
ONT
Ontario
￥31,620 Roundtrip, found 4 hours ago
￥31,620
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Sat, Jan 31 from Denver to Ontario, returning Sat, Feb 7, priced at ￥31,620 found 4 hours ago
Delta
Wed, Feb 11 - Sun, Feb 15
DEN
Denver
ONT
Ontario
￥32,210 Roundtrip, found 6 days ago
￥32,210
Roundtrip
found 6 days ago
Select Delta flight, departing Wed, Feb 11 from Denver to Ontario, returning Sun, Feb 15, priced at ￥32,210 found 6 days ago
Delta
Sat, Feb 21 - Fri, Feb 27
DEN
Denver
ONT
Ontario
￥32,390 Roundtrip, found 9 hours ago
￥32,390
Roundtrip
found 9 hours ago
Select Delta flight, departing Sat, Feb 21 from Denver to Ontario, returning Fri, Feb 27, priced at ￥32,390 found 9 hours ago
Delta
Sat, Feb 14 - Sun, Feb 15
DEN
Denver
ONT
Ontario
￥32,520 Roundtrip, found 2 days ago
￥32,520
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Feb 14 from Denver to Ontario, returning Sun, Feb 15, priced at ￥32,520 found 2 days ago
United
Sat, Jan 31 - Sat, Feb 7
DEN
Denver
ONT
Ontario
￥33,240 Roundtrip, found 4 hours ago
￥33,240
Roundtrip
found 4 hours ago
Select United flight, departing Sat, Jan 31 from Denver to Ontario, returning Sat, Feb 7, priced at ￥33,240 found 4 hours ago
Delta
Wed, Feb 11 - Tue, Feb 17
DEN
Denver
ONT
Ontario
￥33,600 Roundtrip, found 2 days ago
￥33,600
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Feb 11 from Denver to Ontario, returning Tue, Feb 17, priced at ￥33,600 found 2 days ago
Delta
Sun, Feb 8 - Sun, Feb 15
DEN
Denver
ONT
Ontario
￥33,900 Roundtrip, found 7 hours ago
￥33,900
Roundtrip
found 7 hours ago
Select Delta flight, departing Sun, Feb 8 from Denver to Ontario, returning Sun, Feb 15, priced at ￥33,900 found 7 hours ago

Find the cheapest month to fly from Denver (DEN) to Ontario (ONT)

April is typically the cheapest month to fly

From ￥7,436 - ￥64,862 per traveler.
Flights from Denver (DEN) to Ontario (ONT)
Origin airport
Denver Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
￥29,280
Distance
1306 km
Average flight time
1 hour 21 mins

Denver to Ontario Flights

Sometimes you just need to get out of town or maybe you’re looking for a change of scenery. Regardless of the reason, a flight from Denver to will do just the trick! Go on, plan to see all the famous landmarks and eat your weight in the local cuisine. Your trip is beckoning, so answer the call by packing your suitcase and filling your travel itinerary with exploring Ontario.

Whether you’re flying for business or jet-setting on your personal time, you’ve come to the right place. Here at Expedia.com, we’ll pair you up with DEN to ONT flights that won’t make your bank account wince. Ready to temporarily leave behind Denver for new horizons? Browse through our cheap airfare, and filter by flight times and dates until you find just what you had in mind. From flights without layovers to ones that arrive early in the morning, you’ll come across plane tickets that suit your travel preferences. You can even bundle your flight to ONT with hotels and car rentals to score even bigger savings.

All set to hit the clouds? Book your travel arrangements with us today and have left-over money to put toward your travel outings and adventures.

Frequently asked questions

How much is a flight from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT)?
The lowest price advertised for a round-trip journey from DEN to Ontario Airport is ￥29,280. But you better act soon. This figure is based on fares available within the last 7 days on Expedia for flights departing within the next year. 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 Ontario Airport?
Each airline has different terms and conditions. If you decide to cancel your vacation, head to our Customer Service Portal.
How do I find cheap flights from DIA airport to Los Angeles - Ontario Intl. Airport (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 Denver Intl. Airport (DEN) to ONT flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from DEN to Ontario Airport?
Recline your seat, pick an in-flight movie and 2 hours and 19 minutes will pass by in a jiffy. That's how long it takes to reach Ontario Airport from DEN.
How far is the flight from DEN to Ontario Airport?
With a flight distance of 1,300 kilometers, it's just a hop from DEN to Los Angeles - Ontario Intl. Airport (ONT). It might be a quick journey, but it's still worth packing something to keep you entertained on board.
Which airlines fly direct from DEN to Los Angeles - Ontario Intl. Airport (ONT)?
United Airlines (UA) is a top option. It operates 65 flights from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT) each month. Frontier Airlines (F9) is also worth checking out. It operates 60 flights every month. Between these two airlines, you'll be able to find a good deal from Denver to Ontario.
Are DIA airport to ONT flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from Denver Airport to Los Angeles - Ontario Intl. Airport (ONT) can be hit-or-miss. You may be able to score a bargain, but you could also miss out entirely! If you'd prefer to play it safe and start planning your trip ahead of time, Expedia compares flight deals up to 12 months in advance. Just remember that not all airlines publish their prices that far in advance. Our top tip? Check back often as prices are updated regularly.

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