Cheap Flights from Ontario (ONT) to Denver (DEN) from HK$1,035~

View HK$1,035 flight on Sat, 14 Feb 2026Opens in a new window

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

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Find Cheap Flights from Ontario (ONT) to Denver (DEN)

Prices were available within the past 7 days and start at HK$1,035 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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

April is typically the cheapest month to fly

From HK$372 - HK$3,242 per traveller.
Ontario to Denver route information
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Denver Intl.
Distance
1306 km
Average flight time
3 hours 31 mins

Flights from Los Angeles to Denver

Book cheap flights from Los Angeles (ONT) to Denver (DEN) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Los Angeles (ONT) to Denver (DEN) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Los Angeles (ONT) to Denver (DEN) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Denver flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Denver and things to do in Denver for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Denver more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Denver is HK$1,035 now!

 

Frequently asked questions

How much is a flight from Los Angeles - Ontario Intl. Airport (ONT) to DIA airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price listed for a round-trip journey from ONT to DIA airport was . Cheap tickets don't hang around forever, so make sure you book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Ontario Airport to Denver Intl. Airport (DEN)?
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 Ontario Airport to DIA airport 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 ONT to Denver Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Los Angeles - Ontario Intl. Airport (ONT) to Denver Intl. Airport (DEN)?
Forget about a movie marathon on this flight — it's just 1,300 kilometers from Ontario to Denver. Find your seat, enjoy the in-flight service and you'll be touching down in no time.
Which airlines fly direct from Ontario Airport to DEN?
There are a few airlines that travel directly from Los Angeles - Ontario Intl. Airport (ONT) to Denver Intl. Airport (DEN). Southwest Airlines (WN) is a top choice, offering 117 flights on this route each month. Frontier Airlines (F9) is another popular choice. It operates 60 flights per month. Between these two airlines, you'll be able to find a great deal from Ontario to Denver.
Are Los Angeles - Ontario Intl. Airport (ONT) to DEN flight tickets cheaper when they're purchased at the last minute?
Flight prices go up and down like a yo-yo, so not always. While last-minute flight deals between Los Angeles - Ontario Intl. Airport (ONT) and Denver Intl. Airport (DEN) are of course possible, it also makes sense to keep an eye on prices well before you fly. In fact, some airlines publish their prices up to a year before the departure date. Expedia is continuously updating the biggest airfare bargains around, so keep checking and be ready to pounce when the price dips.

Explore a world of travel with Expedia

*Available to Expedia members.