￥16,080 Cheap Flights from Ontario (ONT) to Denver (DEN)

View ￥16,080 flight on Tue, Oct 21, 2025Opens in a new window

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

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Cheap Flights from Ontario to Denver (ONT-DEN)

Prices were available within the past 7 days and start at ￥16,080 for one-way flights and ￥32,040 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Nov 1 - Sat, Nov 8
ONT
Ontario
DEN
Denver
￥32,040 Roundtrip, found 5 days ago
￥32,040
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Nov 1 from Ontario to Denver, returning Sat, Nov 8, priced at ￥32,040 found 5 days ago
Delta
Sat, Nov 8 - Thu, Nov 27
ONT
Ontario
DEN
Denver
￥32,150 Roundtrip, found 6 days ago
￥32,150
Roundtrip
found 6 days ago
Select Delta flight, departing Sat, Nov 8 from Ontario to Denver, returning Thu, Nov 27, priced at ￥32,150 found 6 days ago
Delta
Sun, Nov 9 - Tue, Nov 11
ONT
Ontario
DEN
Denver
￥32,360 Roundtrip, found 18 hours ago
￥32,360
Roundtrip
found 18 hours ago
Select Delta flight, departing Sun, Nov 9 from Ontario to Denver, returning Tue, Nov 11, priced at ￥32,360 found 18 hours ago
United
Sat, Nov 1 - Sat, Nov 8
ONT
Ontario
DEN
Denver
￥32,970 Roundtrip, found 5 days ago
￥32,970
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 1 from Ontario to Denver, returning Sat, Nov 8, priced at ￥32,970 found 5 days ago
Hawaiian Airlines
Fri, Nov 14 - Mon, Dec 1
ONT
Ontario
DEN
Denver
￥34,300 Roundtrip, found 6 days ago
￥34,300
Roundtrip
found 6 days ago
Select Hawaiian Airlines flight, departing Fri, Nov 14 from Ontario to Denver, returning Mon, Dec 1, priced at ￥34,300 found 6 days ago
United
Mon, Dec 22 - Thu, Dec 25
ONT
Ontario
DEN
Denver
￥34,410 Roundtrip, found 5 days ago
￥34,410
Roundtrip
found 5 days ago
Select United flight, departing Mon, Dec 22 from Ontario to Denver, returning Thu, Dec 25, priced at ￥34,410 found 5 days ago
Delta
Sat, Nov 8 - Sat, Nov 15
ONT
Ontario
DEN
Denver
￥35,050 Roundtrip, found 5 days ago
￥35,050
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Nov 8 from Ontario to Denver, returning Sat, Nov 15, priced at ￥35,050 found 5 days ago
Delta
Wed, Oct 15 - Mon, Oct 20
ONT
Ontario
DEN
Denver
￥35,770 Roundtrip, found 4 days ago
￥35,770
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Oct 15 from Ontario to Denver, returning Mon, Oct 20, priced at ￥35,770 found 4 days ago
United
Fri, Oct 24 - Sat, Nov 1
ONT
Ontario
DEN
Denver
￥35,880 Roundtrip, found 5 days ago
￥35,880
Roundtrip
found 5 days ago
Select United flight, departing Fri, Oct 24 from Ontario to Denver, returning Sat, Nov 1, priced at ￥35,880 found 5 days ago
American Airlines
Wed, Oct 8 - Wed, Oct 15
ONT
Ontario
DEN
Denver
￥39,460 Roundtrip, found 5 days ago
￥39,460
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Oct 8 from Ontario to Denver, returning Wed, Oct 15, priced at ￥39,460 found 5 days ago

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

April is typically the cheapest month to fly

From ￥7,043 - ￥58,488 per traveler.

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city center is 32 minutes. Flights from ￥44,290
DEN
Denver Intl.
Cheapest
Average driving time to city center32 min
Flights from ￥44,290

Frequently asked questions

How much is a flight from Ontario Airport to Denver Intl. Airport (DEN)?
The lowest price advertised for a round-trip journey from Los Angeles - Ontario Intl. Airport (ONT) to DIA airport is ￥32,040. But you better move fast. This price is taken from fares listed 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 ONT to Denver Intl. Airport (DEN)?
This differs from airline to airline, as each one has its own terms and conditions. Visit the Customer Service Portal, where you'll find instructions on how to cancel your flight online.
How do I find cheap flights from Ontario Airport to DEN 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 Ontario Airport to Denver Intl. Airport (DEN) flights, you'll see a "no change fees" filter for you to select.
How many hours is the flight from Ontario Airport to DEN?
With the flight time between Los Angeles - Ontario Intl. Airport (ONT) and Denver Airport a comfortable 2 hours and 18 minutes, you'll be discovering the sights of Denver in no time.
How far is the flight from ONT to DIA airport?
A flight distance of just 1,300 kilometers separates Ontario and Denver. Once you're in the air, you won't have time to do much more than read the magazine in your seat pocket.
Which airlines fly direct from Ontario Airport to DIA airport?
United Airlines (UA) is the preferred option for many travelers. It operates 60 flights from Los Angeles - Ontario Intl. Airport (ONT) to DEN each month. Another carrier servicing this route is Frontier Airlines (F9). You'll have 60 flights each month to take your pick of.
Are Los Angeles - Ontario Intl. Airport (ONT) to Denver Intl. Airport (DEN) flight tickets cheaper when they're purchased at the last minute?
Flight prices always go up and down, so not always. While last-minute deals between Los Angeles - Ontario Intl. Airport (ONT) and Denver Airport are of course possible, it's also a good idea to keep an eye on prices well before you fly. In fact, some air carriers advertise their prices up to 12 months before the departure date. Expedia is continuously updating the biggest airfare bargains around, so check back often and be ready to pounce when prices drop.

Travel information

Travel information

Origin airport
Los Angeles - Ontario Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
￥32,040
Distance
1306 km
Average flight time
3 hours 13 mins

Book with confidence

Book with confidence

Ontario to Denver 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 Ontario 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 Denver.

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 ONT to DEN flights that won’t make your bank account wince. Ready to temporarily leave behind Ontario 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 DEN 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.

Ontario to Denver Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

Ontario nearby Airports

Los Angeles

Los Angeles Intl. to Denver
￥20,570

Orange County

John Wayne to Denver
￥30,210

Burbank

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