$321 Cheap United flights Honolulu (HNL) to Denver (DEN)

Apply the "Price (lowest to highest)" filter on Expedia to find cheap United Airlines round-trip flights from $359 from HNL to DEN. Affordable one-way tickets from $321 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Look for affordable United Airlines flights from Daniel K. Inouye Intl. Airport (HNL) to Denver Intl. Airport (DEN) one to three months prior to your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and itinerary, the ideal day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest United Airlines flight from HNL to DEN takes off at 8:45PM UTC-10, touching down at 6:30AM UTC-7. If you want to jet off later in the day, the last United Airlines flight leaves HNL at 10:50PM UTC-10 and touches down at DEN at 8:54AM UTC-7. Flying early is generally a smart choice as morning and mid-morning flights are least likely to face cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.

Fly from HNL to DEN with United Airlines and look forward to a range of perks starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.