$134 Cheap Delta flights Washington (IAD) to Boston (BOS)

You can discover affordable return Delta Air Lines flights from $247 from IAD to BOS by sorting your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $134 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.

January is one of the most affordable months to jet off to Boston with Delta Air Lines. You could also find excellent prices on one-way and return fares in February.

Look for affordable Delta Air Lines flights from Washington Dulles Intl. Airport (IAD) to Logan Intl. Airport (BOS) one to three months before 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 best day to book a domestic flight is generally 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.

Select our “Nonstop” filter when browsing for direct Delta Air Lines flights from IAD to BOS. You’ll also be able to compare other carriers offering the same nonstop route.

To find the earliest departure from IAD to BOS with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Booking an early flight generally means 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 Washington Dulles Intl. Airport (IAD) to Boston come in to Logan Intl. Airport (BOS). This is the main entry point to this destination.

Taking off from IAD to BOS with Delta Air Lines means enjoying plenty of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when you book through Expedia, One Key™ members can earn OneKeyCash™* to use on select future travel purchases. That’s in addition to 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.

Changes are generally free within 24 hours of booking, but your airline may charge you after that. For more details about modifying your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you’d like the freedom to update your itinerary without being charged, tick the “Changes included” and “No cancel fee” filters when planning your next break.