$139 Cheap Delta flights Phoenix (PHX) to Washington (IAD)

You’ll find cheap round-trip Delta Air Lines flights from $251 from PHX to IAD by sorting your results from “Price (lowest to highest)” on Expedia. Or look for deals from $139 for a one-way journey.**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.

Search for return or one-way flights to Washington in January or February. You could find a cheap fare with Delta Air Lines during these off-peak travel months.

Look for cheap Delta Air Lines flights from Sky Harbor Intl. Airport (PHX) to Washington Dulles Intl. Airport (IAD) one to three months ahead of your departure. 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. No matter the fare type and journey, the best 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 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.

Select our “Nonstop” filter when browsing for direct Delta Air Lines flights from PHX to IAD. You can also compare other carriers servicing the same nonstop journey.

To find the earliest departures from PHX to IAD with Delta Air Lines, filter your results by “Morning” and “Early Morning.” Choosing an early flight usually 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.

Delta Air Lines flights from Sky Harbor Intl. Airport (PHX) to Washington come in to Washington Dulles Intl. Airport (IAD). This is the main gateway to this destination.

Offering a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a top choice for many travelers flying from PHX to IAD. Also, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which you can put toward future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on your ticket type, a fee may apply if you cancel or reschedule your flight more than 24 hours after it has been confirmed. To secure tickets with more flexibility, select our “Changes included” or “No cancel fee” filter while looking for flights. For more details on canceling or changing your reservation, go to “Trips,” select your flight and click on “Manage Booking.”