$147 Cheap United flights Washington (IAD) to Oranjestad (AUA)

Scoring cheap one-way United Airlines flights from IAD to AUA from $147 on Expedia is simple — just filter by "Price (lowest to highest)." Alternatively, check out our affordable return fares from $344 for your next break.**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.

Getting the best United Airlines deals from IAD to AUA often comes down to timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your tickets on a Sunday rather than a Friday, which is often the most expensive day to book.* It's a good idea to start searching for flights about one month before your travel dates.*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.

Taking off from IAD at 8:26AM UTC-5, the earliest United Airlines flight to AUA lands at 1:50PM UTC-4. Flying earlier in the day means you're less likely to experience cancellations.* Prefer a later start? The last United Airlines flight from IAD to AUA departs at 8:26AM UTC-5 and touches down at 1:50PM UTC-4.*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.

Travel from IAD to AUA with United Airlines and enjoy a range of benefits starting with a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you could 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.