$125 Cheap Delta flights Boston (BOS) to Washington (IAD)

You’ll discover affordable round-trip Delta Air Lines flights from $243 from BOS to IAD by sorting your results from “Price (lowest to highest)” on Expedia. Or search for options from $125 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 one-way or return flights to Washington in January or February. You could find lower fares with Delta Air Lines during these off-peak times.

Look for affordable Delta Air Lines flights from Logan Intl. Airport (BOS) to Washington Dulles Intl. Airport (IAD) one to three months ahead of your departure day. 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. Regardless of fare class and itinerary, the ideal day to book a domestic flight is usually Sunday and the most expensive is typically 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 see if there’s a direct route from BOS to IAD with Delta Air Lines or any other airlines, use our “Nonstop” filter when looking for flights.

Sort your results by “Morning” and “Early Morning” to see the earliest departures from BOS to IAD. Taking off early means flight cancellations are less likely.**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 Logan Intl. Airport (BOS) to Washington come in to Washington Dulles Intl. Airport (IAD). This is the main gateway to this destination.

Delta Air Lines makes flying from BOS to IAD more comfortable with a rewarding loyalty program and an excellent in-flight experience. You even have the chance to collect points with Delta SkyMiles. Be sure to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s usually possible to reschedule or cancel your flight, although there may be additional charges if your booking was made over 24 hours ago. Want to keep your options open? Make use of Expedia’s “Changes included” and “No cancel fee” filters to find flights that won’t charge you extra if you need to revise your plans. To update your booking, go to “Trips,” select your flight and click on “Manage Booking” for more details.