$81 Cheap United flights Boston (BOS) to Washington (IAD)

You can discover cheap return United Airlines flights from $161 from BOS to IAD by filtering your results from “Price (lowest to highest)” on Expedia. Or search for options from $81 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 round-trip flights to Washington in January or February. You could find a cheap fare with United Airlines during these off-peak times.

For cheap United Airlines fares from Logan Intl. Airport (BOS) 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 tends to be the most affordable, 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.

Take off on one of United Airlines’s 28 direct weekly flights from Logan Intl. Airport (BOS) to Washington Dulles Intl. Airport (IAD). To see your options, enter your origin, destination and dates and hit search. Then apply the “Nonstop” and “Airline” filters.

Take off from Logan Intl. Airport (BOS) for Washington Dulles Intl. Airport (IAD) on a direct United Airlines flight, and you’ll be in the sky for about 1h 45m.

If you’re looking for flexibility, Friday offers the most choice for United Airlines flights from Logan Intl. Airport (BOS) to Washington Dulles Intl. Airport (IAD). Take your pick of 4 different departures.

The first flight from BOS to IAD with United Airlines departs at 5:45AM UTC-5. You’ll land at 7:31AM UTC-5. The last United Airlines flight of the day leaves at 7:28PM UTC-5 and arrives at 9:14PM UTC-5. With approximately 20% fewer cancellations for morning and mid-morning flights, beginning your travel day early is typically the smartest choice.**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.

When taking off from Logan Intl. Airport (BOS) to Washington with United Airlines, you’ll probably arrive at Washington Dulles Intl. Airport (IAD). This is the airline’s main gateway to the city. Other nearby airports like Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) may have lower airfares, so it’s a smart idea to check out all your options on Expedia.

Offering a rewarding loyalty program, United Airlines is a top choice for many travelers heading from BOS to IAD. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

United Airlines usually flies Boeing 737-800 planes for flights from Logan Intl. Airport (BOS) to Washington Dulles Intl. Airport (IAD). This airline also operates the Boeing 737 MAX 8 on this route. Remember that aircraft type can change due to operational reasons, so the plane you catch might be different on the day.

Depending on the type of ticket you purchased, a fee typically applies if you modify or cancel your booking more than 24 hours after confirmation. To secure plane tickets with more flexibility, select our “No cancel fee” or “Changes included” filter when searching for flights. To learn more about canceling or changing your reservation, visit “Trips,” select your flight and tick “Manage Booking.”