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$127+ Cheap flights from Seattle to Baltimore (SEA - BWI)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BWI
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Baltimore/Washington are usually found in September or October, booked 76 days in advance, depart on a Thursday or Tuesday and return on a Tuesday

Cheap flight deals from Seattle to Baltimore

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Baltimore (BWI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 2, 2025.

Round-trip from

$244
(Priceline)

One-way from

$128
(FlightHub)

Popular in

December

Cheapest in

September

Average price

$437
From Seattle/Tacoma Intl to Baltimore/Washington
Search Deals
One-way flight from Seattle/Tacoma Intl to Baltimore/Washington
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Seattle to Baltimore

Cheapest flights from Seattle to Baltimore
Explore the most affordable flight options available from Seattle to Baltimore. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2025.

This Priceline deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/115:30 pmSEA - BWI
1 stop9h 35mMultiple Airlines
Fri 8/155:26 pmBWI - SEA
1 stop10h 08mMultiple Airlines
Deal found 6/30$244
This CheapOair deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/18:01 pmSEA - BWI
1 stop17h 30mFrontier
Sun 8/107:53 pmBWI - SEA
1 stop15h 41mFrontier
Deal found 6/29$247
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1312:46 amSEA - BWI
1 stop8h 06mAmerican Airlines
Sun 8/177:20 pmBWI - SEA
1 stop8h 36mAmerican Airlines
Deal found 6/30$252
This Mytrip deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/155:30 pmSEA - BWI
1 stop9h 35mSpirit Airlines
Tue 7/296:22 pmBWI - SEA
2 stops25h 03mSpirit Airlines
Deal found 6/30$256
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/259:29 pmSEA - BWI
Nonstop5h 04mHawaiian Airlines
Sun 8/317:00 amBWI - SEA
Nonstop5h 40mHawaiian Airlines
Deal found 6/30$271
This Alaska Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/199:29 pmSEA - BWI
Nonstop5h 01mAlaska Airlines
Wed 9/247:00 amBWI - SEA
Nonstop5h 40mAlaska Airlines
Deal found 6/30$277
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/259:10 pmSEA - BWI
Nonstop5h 00mSouthwest
Sun 8/317:35 amBWI - SEA
1 stop8h 40mSouthwest
Deal found 6/30$287
This Cheapflightsfares deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:04 pmSEA - BWI
1 stop14h 20mSun Country Air
Mon 10/1312:21 pmBWI - SEA
1 stop7h 58mSun Country Air
Deal found 6/30$289
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1911:55 pmSEA - BWI
1 stop7h 50mDelta
Wed 8/277:15 amBWI - SEA
1 stop10h 28mDelta
Deal found 6/30$297

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Baltimore that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
Use the filters below to find and compare flights from Seattle to Baltimore that are best for you.

Fly from

Seattle

Fly to

Baltimore

Route

Depart

Return

Price

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Mon 8/11

5:30 pm-6:05 am

1 stop9h 35m

Baltimore/Washington

Fri 8/15

5:26 pm-12:34 am

1 stop10h 08m

$244

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Fri 8/1

8:01 pm-4:31 pm

1 stop17h 30m

Baltimore/Washington

Sun 8/10

7:53 pm-8:34 am

1 stop15h 41m

$247

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 8/13

12:46 am-11:52 am

1 stop8h 06m

Baltimore/Washington

Sun 8/17

7:20 pm-12:56 am

1 stop8h 36m

$252

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 7/15

5:30 pm-6:05 am

1 stop9h 35m

Baltimore/Washington

Tue 7/29

6:22 pm-4:25 pm

2 stops25h 03m

$256

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Mon 8/25

9:29 pm-5:33 am

Nonstop5h 04m

Baltimore/Washington

Sun 8/31

7:00 am-9:40 am

Nonstop5h 40m

$271

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 8/19

9:29 pm-5:30 am

Nonstop5h 01m

Baltimore/Washington

Wed 9/24

7:00 am-9:40 am

Nonstop5h 40m

$277

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Mon 8/25

9:10 pm-5:10 am

Nonstop5h 00m

Baltimore/Washington

Sun 8/31

7:35 am-1:15 pm

1 stop8h 40m

$287

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 10/9

6:04 pm-11:24 am

1 stop14h 20m

Baltimore/Washington

Mon 10/13

12:21 pm-5:19 pm

1 stop7h 58m

$289

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 8/19

11:55 pm-10:45 am

1 stop7h 50m

Baltimore/Washington

Fri 9/19

7:15 am-2:39 pm

1 stop10h 24m

$297

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 8/9

5:30 pm-6:05 am

1 stop9h 35m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 18 results
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The best insider tips for Seattle to Baltimore flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Baltimore trip
Airports
SEA

Use SEA Spot Saver to book security screening appointments in advance, reducing wait times. Sign up online a few days before your flight.

Read more about SEAby Brandon Schultz
BWI

Take the MTA Light Rail from BWI to downtown Baltimore for a quick and easy trip. Shuttles connect to the MARC and Amtrak station.

Read more about BWIby Emily Zemler
Our travel experts
Emily Zemler

Emily Zemler

Expert on BWI

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Seattle to Baltimore

Have a flexible travel schedule? Discover the best time to fly to Baltimore from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Baltimore

How far ahead should I book a flight from Seattle to Baltimore?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Baltimore. Price data was last updated on June 27, 2025.

The best time to book flights from Seattle to Baltimore is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Baltimore?

Currently, August is the cheapest month in which you can book a flight from Seattle to Baltimore (average of $241). Flying from Seattle to Baltimore in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to BWI?

Find hourly flight availability from Seattle to Baltimore. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 2, 2025.

One of the essential ways to save on airfare from Seattle to Baltimore is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 27% on airfare.

What is the cheapest day to fly from Seattle to Baltimore?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Baltimore. Price data was last updated on June 29, 2025.

Travelers seeking maximum savings on their Seattle to Baltimore flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Baltimore

Get insights into the airlines that provide service to Baltimore. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Baltimore. Reviews last updated July 2, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Seattle to Baltimore have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,272 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,975 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Hawaiian Airlines
7.8
Good
2,542 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Entertainment

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle to Baltimore. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to Baltimore?

    Baltimore/Washington is the airport most travelers will use when flying to Baltimore from Seattle/Tacoma Intl. Booking flights from Seattle/Tacoma Intl (SEA) to Baltimore/Washington (BWI) should be relatively easy as there are 6 daily flights to Baltimore from 8 different airlines. 4h 58m is how long a flight from Seattle to Baltimore/Washington will take if you book a nonstop flight.

  • How popular is this Seattle to Baltimore flight route?

    This flight path from Seattle/Tacoma Intl to Baltimore/Washington was viewed by 17 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines flying from Seattle to Baltimore round-trip?

    Cheapflights users have booked flights from Seattle to Baltimore round-trip from $247. Other airlines that can offer you cheap pricing are American Airlines, from $252, and Spirit Airlines, from $256. Frontier is priced at 42% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Baltimore one-way?

    The cheapest airlines for a one-way flight from Seattle to Baltimore are Spirit Airlines ($128), Frontier ($133), and Alaska Airlines ($139).

  • What are the most reliable airlines from Seattle to Baltimore?

    No one likes to see their flight delayed. When booking a flight from Seattle to Baltimore consider choosing Southwest (85%), Alaska Airlines (69%) or Hawaiian Airlines (69%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Baltimore?

    Looking for the cheapest flight from Seattle to Baltimore? While on average our users pay $367, our data indicates the cheapest price to be $119. The most popular route (Seattle/Tacoma Intl - Baltimore/Washington), is priced around $190.

  • Where are the most common layover locations when flying from Seattle to Baltimore?

    Flights departing from Seattle and landing in Baltimore layover in Charlotte most frequently. Seattle to Baltimore flights stop in Denver the next most.

  • What are some popular things to do or see while on a layover in Charlotte?

    If you're on a layover in Charlotte and looking for things to do, consider visiting Carowind, Mint Museum Uptown, or NASCAR Hall of Fame. Carowind, Mint Museum Uptown, and NASCAR Hall of Fame can be visited by traveling about 8.2 mi, 5.4 mi, and 5.7 mi respectively from Charlotte Douglas. Travelers can rent a car at Charlotte Douglas for an average daily rate of $43 to make sightseeing during their layover a little easier.

  • What are some popular points of interest to see during a layover in Denver?

    Coors Field, Paramount Theatre, and Larimer Square are currently the most popular points of interest in Denver at the moment. Travelers on a layover in Denver can visit Coors Field, Paramount Theatre, and Larimer Square, by traveling 18.4 mi, 18.6 mi, and 18.9 mi, respectively after landing at Denver Intl. Those on a layover in Denver in need of a rental car can book one at Denver Intl for about $56.

  • Where are the least popular layover locations for Seattle to Baltimore flights?

    Flights departing from Seattle and landing in Baltimore layover in Chicago least frequently.

  • Can I find deals for flights from Seattle to Baltimore that include hotel bookings?

    Yes. In addition to deals on Seattle to Baltimore flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Baltimore?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Baltimore.

  • Can I find deals for business class flights from Seattle to Baltimore?

    Yes. Cheapflights offers flight deals from Seattle to Baltimore by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Baltimore?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Baltimore (average of $241). Flying from Seattle to Baltimore in March is currently the most expensive (average of $290). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Seattle to Baltimore

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Dulles Intl flights
Seattle to Reagan-National flights
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Portland to Salisbury flights
Walla Walla to Baltimore flights
Yakima to Philadelphia flights
Walla Walla to Dulles Intl flights
Walla Walla to Reagan-National flights

Top 8 airlines flying from Seattle to Baltimore

Discover the top 8 airlines that operate flights from Seattle to Baltimore. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$86Average$194FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$178Average$274FlexibilityNo cancel feeOn-time65%
DeltaCheapest$206Average$350FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$364FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$233Average$437FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$262Average$409FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$276Average$476FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$304Average$451FlexibilityNo cancel feeOn-time63%

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