$360 Cheap United flights Washington (IAD) to Honolulu (HNL)

Make use of the "Price (lowest to highest)" filter on Expedia to find cheap United Airlines return flights from $745 from IAD to HNL. Affordable one-way tickets from $360 are available as well.**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.

Start searching one to three months ahead of your departure date to score cheaper fares on United Airlines flights from Washington Dulles Intl. Airport (IAD) to Daniel K. Inouye Intl. Airport (HNL). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic journeys.*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 IAD to HNL departs at 8:15AM UTC-5, touching down at 2:16PM UTC-10. If you want to head off later in the day, the last United Airlines flight leaves IAD at 8:15AM UTC-5 and touches down at HNL at 2:16PM UTC-10. Flying earlier is generally a good idea as 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.

A rewarding loyalty program and the opportunity to collect points through United Mileage Plus are the start of the reasons to depart from IAD to HNL with United Airlines. Plus, when you join Expedia's free One Key™ program, you can earn OneKeyCash™* on top of any airline loyalty program earnings. You can put it toward your future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.