$104 Cheap Delta flights Seattle (SEA) to Baltimore (BWI)

Landing cheap one-way Delta Air Lines flights from SEA to BWI from $104 on Expedia is a cinch — just filter by “Price (lowest to highest).” Alternatively, check out our affordable round-trip fares from $198 for your next exciting getaway.**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.

Look for one-way or return flights to Baltimore in January or February. You could find lower fares with Delta Air Lines during these off-peak travel months.

Start searching one to three months before your departure to score cheap fares on Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic journeys.*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 route from SEA to BWI with Delta Air Lines or another airline, select the “Nonstop” filter when looking for flights.

Search Delta Air Lines’s earliest flights from SEA to BWI by using our “Early Morning” and “Morning” filters. Not only will you get to where you’re going 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.

Jump on a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore, and you’re most likely to come in to Baltimore Washington Intl. Thurgood Marshall Airport (BWI). This is the airline’s main hub in this city.

Delta Air Lines makes traveling from SEA to BWI more comfortable with an excellent in-flight experience and a rewarding loyalty program. 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.

It’s generally possible to change or cancel your flight, although there may be additional fees if your booking was made more than 24 hours ago. Prefer to keep your options open? Use our “No cancel fee” and “Changes included” filters to find flights that won’t charge you extra if you need to alter your plans. To update your booking, go to “Trips,” select your flight and click on “Manage Booking” for more information.