Popular airlines from Seattle-Tacoma International Airport (SEA) to Baltimore Washington Intl. Airport (BWI)

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Cheap Flights from Seattle to Baltimore (SEA-BWI)

Prices were available within the past 7 days and start at $85 for one-way flights and $159 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Thu, Feb 5 - Sun, Feb 8
SEA
Seattle
BWI
Baltimore
$159 Roundtrip, found 4 days ago
$159
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Thu, Feb 5 from Seattle to Baltimore, returning Sun, Feb 8, priced at $159 found 4 days ago
United
Fri, Dec 5 - Sun, Dec 7
SEA
Seattle
BWI
Baltimore
$174 Roundtrip, found 1 hour ago
$174
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Dec 5 from Seattle to Baltimore, returning Sun, Dec 7, priced at $174 found 1 hour ago
United
Fri, Dec 5 - Wed, Jan 7
SEA
Seattle
BWI
Baltimore
$177 Roundtrip, found 10 hours ago
$177
Roundtrip
found 10 hours ago
Select United flight, departing Fri, Dec 5 from Seattle to Baltimore, returning Wed, Jan 7, priced at $177 found 10 hours ago
American Airlines
Thu, Jan 22 - Mon, Jan 26
SEA
Seattle
BWI
Baltimore
$179 Roundtrip, just found
$179
Roundtrip
just found
Select American Airlines flight, departing Thu, Jan 22 from Seattle to Baltimore, returning Mon, Jan 26, priced at $179 just found
Southwest Airlines
Fri, Dec 12 - Mon, Jan 5
SEA
Seattle
BWI
Baltimore
$179 Roundtrip, just found
$179
Roundtrip
just found
Select Southwest Airlines flight, departing Fri, Dec 12 from Seattle to Baltimore, returning Mon, Jan 5, priced at $179 just found
Southwest Airlines
Sun, Dec 14 - Sat, Jan 17
SEA
Seattle
BWI
Baltimore
$184 Roundtrip, just found
$184
Roundtrip
just found
Select Southwest Airlines flight, departing Sun, Dec 14 from Seattle to Baltimore, returning Sat, Jan 17, priced at $184 just found
United
Fri, Dec 5 - Mon, Dec 8
SEA
Seattle
BWI
Baltimore
$186 Roundtrip, found 7 hours ago
$186
Roundtrip
found 7 hours ago
Select United flight, departing Fri, Dec 5 from Seattle to Baltimore, returning Mon, Dec 8, priced at $186 found 7 hours ago
Delta
Fri, Dec 12 - Mon, Jan 5
SEA
Seattle
BWI
Baltimore
$188 Roundtrip, just found
$188
Roundtrip
just found
Select Delta flight, departing Fri, Dec 12 from Seattle to Baltimore, returning Mon, Jan 5, priced at $188 just found
United
Wed, Dec 10 - Fri, Dec 12
SEA
Seattle
BWI
Baltimore
$188 Roundtrip, found 1 hour ago
$188
Roundtrip
found 1 hour ago
Select United flight, departing Wed, Dec 10 from Seattle to Baltimore, returning Fri, Dec 12, priced at $188 found 1 hour ago
Alaska Airlines
Tue, Dec 9 - Wed, Dec 10
SEA
Seattle
BWI
Baltimore
$252 Roundtrip, found 3 hours ago
$252
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, Dec 9 from Seattle to Baltimore, returning Wed, Dec 10, priced at $252 found 3 hours ago

Find the cheapest month to fly from Seattle (SEA) to Baltimore (BWI)

April is typically the cheapest month to fly

From $166 - $508 per traveler.

Alternative airports near Baltimore

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Cheapest and Closest option available. Average driving time to city center is 16 minutes. Flights from $239
BWI
Baltimore Washington Intl. Thurgood Marshall
CheapestClosest
Average driving time to city center16 min
Flights from $239
Flights from Seattle (SEA) to Baltimore (BWI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, Sun Country Airlines, United
Roundtrip price
$159
Distance
2328 mi
Average flight time
10 hours 20 mins

Seattle to Baltimore Flights

The cheapest times to fly from Seattle to Baltimore

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 Seattle to Baltimore are during the month of February. You can find some of the cheapest flights from Seattle to Baltimore with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Baltimore

Sunday is one of the best days to book for cheap flights from Seattle to Baltimore: 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 Seattle to Baltimore

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 Seattle to Baltimore in 2025. You can also book with separate airlines for your outbound and return journeys, from $85 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 Seattle to Baltimore 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 Seattle to Baltimore 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 much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) cost?
Lock in a cheap one-way flight from $85 or cheap return flight from $159 from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Flying in February can help you save, as it's the cheapest month for flights between SEA and BWI. You'll usually find the lowest prices during off-peak months.
Which airlines fly direct from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
You can fly straight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) on an Alaska Airlines flight.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll fly you from SEA to BWI. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
On average, there are 5 nonstop flights flying from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) per week. If you can't find one that fits your travel plans, consider catching a flight that has a layover. Customize your search on Expedia to include one stop or more and select the best alternative.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
More passengers fly between SEA and BWI at 9 AM than at any other time. Looking to skip the crowds? Pick a flight outside the busiest times and it's possible you'll save on your ticket as well.
What day of the week has the most flights from SEA to BWI?
Friday has the most flights from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI). Consider leaving on this day and you'll have the best chance of finding a departure that works with your plans.
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
The first flight of the day departing from Seattle - Tacoma Intl. Airport (SEA) is at around 9:52AM UTC-8. Hop on this flight and you'll land at Baltimore Washington Intl. Thurgood Marshall Airport (BWI) at approximately 5:59PM UTC-5. The overall travel time is 5h 7m.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
Flights from SEA to BWI have an average travel time of 5 hours and 7 minutes. The total distance between the two is 2,300 mi.
What airline has the least delays from SEA to BWI?
Consider booking with Southwest Airlines if you'd like to go straight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) without any interruptions. This airline has the best track record for punctuality, with an on-time performance of 100%. Want to get notified of any changes? You can check your flight status using the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) route, aim to travel before 3 PM. Later flights have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Baltimore from Seattle - Tacoma Intl. Airport (SEA)?
Seattle - Tacoma Intl. Airport (SEA) offers direct flights to Baltimore. These are a few of the airports you can fly to without layovers:

  • Ronald Reagan Washington National Airport (DCA)
  • Washington Dulles Intl. Airport (IAD)
  • Baltimore Washington Intl. Thurgood Marshall Airport (BWI)

Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI) last-minute?
Last-minute fares from SEA to BWI are typically more expensive. For the lowest rates, start looking for flights early. That said, if your travel plans are flexible, it's possible to find a cheap ticket right before your trip.
Is it cheaper to book a SEA to BWI flight and hotel package?
Compared with arranging flights and hotels separately, booking a SEA to BWI flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the stress out of planning your trip. Just secure your flights and select from our wide range of hotels, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Baltimore Washington Intl. Thurgood Marshall Airport (BWI)?
If you booked your SEA to BWI flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.