$150 Cheap Delta flights Tucson (TUS) to Washington (IAD)

Grab budget-friendly return Delta Air Lines flights from $299 from TUS to IAD by sorting your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $150 for a one-way trip.**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.

For cheap Delta Air Lines fares from Tucson Intl. Airport (TUS) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the overall price. Sunday is typically the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**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.

Filter your results by "Early Morning" and "Morning" to see the earliest flights from TUS to IAD. Setting off early means you're less likely to experience 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.

Flying from TUS to IAD with Delta Air Lines means enjoying a host of benefits, including a rewarding loyalty program and an excellent in-flight experience. Plus, when booking through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That's on top of the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.