$99 Cheap Delta flights Pittsburgh (PIT) to Washington (IAD)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap Delta Air Lines return flights from $158 from PIT to IAD. Affordable one-way options from $99 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.

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

Search for cheap Delta Air Lines flights from Pittsburgh Intl. Airport (PIT) to Washington Dulles Intl. Airport (IAD) one to three months prior to 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 class and itinerary, the best day of the week 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.

To find out if there’s a direct trip from PIT to IAD with Delta Air Lines or another carrier, check the “Nonstop” filter when browsing for tickets.

Find Delta Air Lines’s earliest flights from PIT to IAD by checking the “Early Morning” and “Morning” filters. Not only will you arrive sooner, early departures also have a 20% less chance of being canceled.**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 Pittsburgh Intl. Airport (PIT) to Washington touch down at Washington Dulles Intl. Airport (IAD). This is the main gateway to this destination.

Delta Air Lines makes traveling from PIT to IAD more enjoyable with a rewarding loyalty program and an excellent in-flight experience. You could even start earning points with Delta SkyMiles. Make sure you sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future trips.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You can usually modify or cancel your flight, although there may be additional fees if your booking was made over 24 hours ago. Prefer to keep your options open? Make use of Expedia’s “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you have to revise your plans. To make modifications, head to “Trips,” select your flight and click on “Manage Booking” for further information.