Cheap Flights from Baltimore (BWI) to Washington (IAD)

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Flights from Baltimore (BWI) to Washington (IAD)
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Washington Dulles Intl.
Distance
44 mi

Baltimore to Washington Flights

The cheapest times to fly from Baltimore to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to Washington are during the month of . You can find some of the cheapest flights from Baltimore to Washington with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Baltimore to Washington

Sunday is one of the best days to book for cheap flights from Baltimore to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Baltimore to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How long does it take to fly from BWI Marshall to Dulles Intl. Airport?
United Airlines operates a direct flight setting off from BWI Marshall at 10:51PM and landing at Dulles Intl. Airport at 11:36PM — a flight duration of 45 minutes. Pick your perfect seat, pack something to keep you entertained and the time will race by.
Is it cheaper to buy a plane ticket from BWI Airport to Dulles Intl. Airport last minute?
When it comes to booking your flights, being prepared pays dividends. While you could find a deal on a Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to Dulles Intl. Airport flight at the last minute, tickets usually don’t get cheaper as the date of departure nears. Based on flight pricing and demand studies in 2022, we have found that the sweet spot to lock in a domestic flight is between 28 – 35 days ahead. For international trips it’s between three and four months.
What airports do you fly into for Washington from Baltimore?
From Baltimore, you can reach Washington via Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI). Research which hub works best for you before you make a decision. If you choose Washington Dulles Intl. Airport (IAD), it’s approximately 25 mi west of the downtown area. Use the dough you save when booking your airfare with Expedia to uncover the city’s top sights, such as White House and United States Capitol.
What are the most popular departure times for flights from BWI Airport to Dulles Intl. Airport?
For United Airlines flights heading from BWI Marshall to Dulles Intl. Airport, the most popular period is between 10:00 PM - 11:00 PM. If you want to avoid delays, fly out in the morning. This gives you a better chance to avoid the heavy air traffic that builds up in the afternoon.
Can I change the date of my flight from BWI Airport to Dulles Intl. Airport?
You can make changes to your BWI Airport to Dulles Intl. Airport trip via the Expedia Trips portal. But before you make any amendments, check out the fare conditions in your itinerary to see what you can do and if charges apply. Some carriers have a change fee per person, on top of any difference in prices. However, if you booked in the last 24 hours, you may be able to cancel for free and arrange new flights. You can also stop by our Customer Service portal for further information and to connect with our Virtual Agent.

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*Available to One Key members.