HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Baltimore

$135+ 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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BWI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Baltimore with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 Wednesday or Thursday 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 September 11, 2025.

Round-trip from

$197
(Delta)

One-way from

$135
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$326
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. 8% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 10/2712:34 amSEA - BWI
1 stop7h 46mAmerican Airlines
Tue 11/46:00 amBWI - SEA
1 stop8h 40mAmerican Airlines
Deal found 9/11$197
This Southwest deal was found by Cheapflights users on 9/10. 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.
Thu 10/305:15 amSEA - BWI
1 stop8h 45mSouthwest
Sat 11/14:45 pmBWI - SEA
1 stop8h 00mSouthwest
Deal found 9/10$198
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Thu 10/161:02 pmSEA - BWI
1 stop25h 30mFrontier
Mon 10/206:29 pmBWI - SEA
1 stop20h 38mFrontier
Deal found 9/10$199
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 11/412:41 amSEA - BWI
2 stops10h 10mAmerican Airlines
Mon 11/105:10 pmBWI - SEA
1 stop9h 08mAmerican Airlines
Deal found 9/9$202
This Southwest deal was found by Cheapflights users on 9/10. 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 11/36:15 amSEA - BWI
1 stop10h 30mSouthwest
Wed 11/57:00 amBWI - SEA
2 stops16h 40mSouthwest
Deal found 9/10$203
This Frontier deal was found by Cheapflights users on 9/11. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/36:12 amSEA - BWI
1 stop8h 30mFrontier
Mon 10/69:59 pmBWI - SEA
2 stops17h 08mFrontier
Deal found 9/11$204
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:00 amSEA - BWI
2 stops14h 06mFrontier
Sun 9/286:27 pmBWI - SEA
1 stop9h 03mFrontier
Deal found 9/10$205
This Frontier deal was found by Cheapflights users on 9/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/296:12 amSEA - BWI
1 stop8h 30mFrontier
Fri 10/36:27 pmBWI - SEA
1 stop9h 03mFrontier
Deal found 9/10$209
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/206:39 pmSEA - BWI
1 stop19h 37mMultiple Airlines
Fri 10/245:35 amBWI - SEA
1 stop17h 13mMultiple Airlines
Deal found 9/9$211
This Delta deal was found by Cheapflights users on 9/9. 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 11/1111:10 pmSEA - BWI
1 stop7h 52mDelta
Sat 11/225:34 pmBWI - SEA
1 stop7h 40mDelta
Deal found 9/9$212
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Wed 9/247:00 amSEA - BWI
2 stops35h 14mFrontier
Fri 9/266:27 pmBWI - SEA
1 stop29h 12mFrontier
Deal found 9/10$214
This CheapOair deal was found by Cheapflights users on 9/10. 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.
Thu 10/231:02 pmSEA - BWI
1 stop25h 42mFrontier
Sun 10/266:05 amBWI - SEA
2 stops33h 02mFrontier
Deal found 9/10$215

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 September 11, 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

Thu 10/30

5:15 am-5:00 pm

1 stop8h 45m

Baltimore/Washington

Sat 11/1

4:45 pm-9:45 pm

1 stop8h 00m

$198

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 12/4

6:15 am-7:45 pm

1 stop10h 30m

Baltimore/Washington

Mon 12/8

9:10 am-9:50 pm

1 stop15h 40m

$205

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 10/14

1:20 pm-5:15 am

2 stops12h 55m

Baltimore/Washington

Wed 10/22

4:55 pm-11:45 pm

1 stop9h 50m

$214

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Fri 12/5

5:00 pm-6:03 am

1 stop10h 03m

Baltimore/Washington

Thu 12/11

7:15 am-2:59 pm

1 stop10h 44m

$227

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sun 12/7

7:11 pm-6:03 am

1 stop7h 52m

Baltimore/Washington

Tue 12/9

5:34 pm-10:15 pm

1 stop7h 41m

$227

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 12/3

2:03 pm-12:27 am

1 stop7h 24m

Baltimore/Washington

Mon 12/8

6:56 pm-12:20 am

1 stop8h 24m

$227

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 12/3

6:00 am-6:06 pm

1 stop9h 06m

Baltimore/Washington

Sun 12/7

6:00 am-10:39 am

1 stop7h 39m

$227

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 10/25

6:00 am-6:41 pm

1 stop9h 41m

Baltimore/Washington

Tue 11/4

5:39 pm-10:03 pm

1 stop7h 24m

$248

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sun 11/23

7:12 pm-5:58 am

1 stop7h 46m

Baltimore/Washington

Wed 11/26

7:15 am-2:54 pm

1 stop10h 39m

$254

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 10/18

9:03 am-5:12 pm

Nonstop5h 09m

Baltimore/Washington

Wed 10/22

7:51 am-10:42 am

Nonstop5h 51m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 20 results
1
2

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 August 29, 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 September 11, 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 26% 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 September 7, 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 September 11, 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

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Comfort

7.8

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 5 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.

  • How long is the flight from Seattle to Baltimore?

    Departing from Seattle to Baltimore will take you 8h 45m. The distance from Seattle to Baltimore is about 2327 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    Cheapflights users have booked flights from Seattle to Baltimore round-trip from $130. Other airlines that can offer you cheap pricing are Frontier, from $139, and Hawaiian Airlines, from $153. Spirit Airlines is priced at 69% 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 Southwest ($136), United Airlines ($137), and Delta ($149).

  • 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 Finnair (100%), Southwest (74%) or Alaska Airlines (71%) 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 $641, our data indicates the cheapest price to be $158. The most popular route (Seattle/Tacoma Intl - Baltimore/Washington), is priced around $169.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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
Seattle to Philadelphia flights
Portland to Reagan-National flights
Portland to Dulles Intl flights
Portland to Philadelphia flights
Portland to Baltimore flights
Spokane to Reagan-National flights
Spokane to Dulles Intl flights
Spokane to Baltimore flights
Pasco to Dulles Intl flights
Pasco to Reagan-National flights
Pasco to Baltimore flights
Bellingham to Dulles Intl flights
Spokane to Philadelphia flights
Bellingham to Reagan-National flights
Pasco to Philadelphia flights
Bellingham to Baltimore flights
Yakima to Baltimore flights
Wenatchee to Dulles Intl flights
Yakima to Reagan-National flights
Yakima to Dulles Intl flights
Walla Walla to Reagan-National flights
Pullman to Dulles Intl flights
Pullman to Baltimore flights
Portland to Salisbury flights
Wenatchee to Philadelphia flights
Wenatchee to Baltimore flights
Walla Walla to Dulles Intl flights
Pullman to Reagan-National flights
Walla Walla to Baltimore flights
Wenatchee to Reagan-National flights
Seattle to Salisbury flights
Yakima to Philadelphia 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$130Average$276FlexibilityNo cancel feeOn-time65%
FrontierCheapest$139Average$216FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$153Average$418FlexibilityNo cancel feeOn-time85%
DeltaCheapest$206Average$352FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$361FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$262Average$395FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$266Average$433FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$277Average$469FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.