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$72+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BWI
Apr 28 — May 51
Tue 4/28
Tue 5/5
1 adult, Economy
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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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Baltimore/Washington are usually found in September or February, booked 84 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap 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 March 29, 2026.

This SmartFares deal was found by Cheapflights users on 3/26. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:32 pm
SEA
-
BWI
Nonstop5h 12m
Alaska Airlines
Fri 5/17:16 pm
BWI
-
SEA
Nonstop5h 44m
Alaska Airlines
Deal found 3/26$147
This Southwest deal was found by Cheapflights users on 3/26. 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.
Wed 4/2911:45 pm
SEA
-
BWI
1 stop9h 05m
Southwest
Tue 5/53:30 pm
BWI
-
SEA
1 stop11h 05m
Southwest
Deal found 3/26$163
This Southwest deal was found by Cheapflights users on 3/26. 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.
Tue 5/511:45 pm
SEA
-
BWI
2 stops9h 05m
Southwest
Tue 5/126:50 am
BWI
-
SEA
1 stop13h 55m
Southwest
Deal found 3/26$174
This Southwest deal was found by Cheapflights users on 3/26. 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.
Wed 4/2911:45 pm
SEA
-
BWI
1 stop9h 05m
Southwest
Mon 5/47:10 pm
BWI
-
SEA
1 stop7h 55m
Southwest
Deal found 3/26$177
This Southwest deal was found by Cheapflights users on 3/26. 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.
Sat 5/28:30 am
SEA
-
BWI
2 stops9h 55m
Southwest
Wed 5/62:50 pm
BWI
-
SEA
2 stops10h 40m
Southwest
Deal found 3/26$188
This Delta deal was found by Cheapflights users on 3/26. 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.
Sat 4/256:00 am
SEA
-
BWI
1 stop7h 37m
Delta
Sat 5/23:00 pm
BWI
-
SEA
1 stop8h 42m
Delta
Deal found 3/26$197
This Southwest deal was found by Cheapflights users on 3/26. 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.
Sat 4/255:45 am
SEA
-
BWI
2 stops8h 20m
Southwest
Sat 5/22:40 pm
BWI
-
SEA
2 stops10h 20m
Southwest
Deal found 3/26$202
This Delta deal was found by Cheapflights users on 3/26. 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 4/1411:14 pm
SEA
-
BWI
1 stop9h 25m
Delta
Fri 5/17:22 pm
BWI
-
SEA
1 stop7h 32m
Delta
Deal found 3/26$204
This Southwest deal was found by Cheapflights users on 3/26. 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.
Fri 4/2411:55 pm
SEA
-
BWI
1 stop9h 00m
Southwest
Fri 5/16:30 pm
BWI
-
SEA
1 stop9h 25m
Southwest
Deal found 3/26$211

Find 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 March 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$147
(SmartFares)

One-way from

$72
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$388
Provider with most accurate pricing for Seattle/Tacoma Intl-Baltimore/Washington flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Baltimore/Washington flights.
Search Deals
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 ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 29, 2026.
Use the filters below to find and compare flights from Seattle to Baltimore that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 4/25

6:00 am-4:37 pm

1 stop7h 37m

Baltimore/Washington

Sat 5/2

3:00 pm-8:42 pm

1 stop8h 42m

$197

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 4/18

6:00 am-4:37 pm

1 stop7h 37m

Baltimore/Washington

Sat 4/25

6:03 am-10:32 am

1 stop7h 29m

$239

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 4/18

6:55 pm-5:45 am

1 stop7h 50m

Baltimore/Washington

Sat 4/25

1:30 pm-10:10 pm

2 stops11h 40m

$244

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Fri 5/8

11:55 pm-11:55 am

1 stop9h 00m

Baltimore/Washington

Mon 5/11

6:30 pm-12:55 am

1 stop9h 25m

$294

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Fri 5/8

11:35 pm-10:44 am

1 stop8h 09m

Baltimore/Washington

Tue 5/19

6:59 pm-11:44 pm

1 stop7h 45m

$299

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sun 4/19

10:35 pm-9:39 am

1 stop8h 04m

Baltimore/Washington

Mon 4/20

6:55 pm-12:34 am

1 stop8h 39m

$326

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sun 5/24

5:04 pm-7:24 am

1 stop11h 20m

Baltimore/Washington

Thu 5/28

6:59 pm-1:29 am

1 stop9h 30m

$349

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 5/6

11:40 am-5:40 am

2 stops15h 00m

Baltimore/Washington

Sat 5/16

1:30 pm-10:10 pm

2 stops11h 40m

$357

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Mon 6/1

10:40 pm-9:17 am

1 stop7h 37m

Baltimore/Washington

Mon 6/8

6:59 pm-1:29 am

1 stop9h 30m

$370

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Fri 5/8

6:30 am-9:25 pm

2 stops11h 55m

Baltimore/Washington

Fri 5/15

4:45 pm-12:05 am

2 stops10h 20m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 22 resultsSorted by cheapest first
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2
3

Compare providers for flights from Seattle to Baltimore

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Baltimore in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Baltimore flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Baltimore flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Baltimore flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Baltimore flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Baltimore flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 March 13, 2026.

The best time to book flights from Seattle to Baltimore is 84 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, May is the cheapest month in which you can book a flight from Seattle to Baltimore (average of $120). Flying from Seattle to Baltimore in November is currently the most expensive (average of $209). 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 March 29, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Baltimore as you normally would.

How much does it cost to fly round-trip from Seattle to Baltimore?

The best insider tips for Seattle to Baltimore flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Baltimore trip
Our travel experts
Emily Zemler

Emily Zemler

Expert on BWI

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 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

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 March 29, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta 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.
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,331 reviews
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,133 reviews
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,357 reviews
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Hawaiian Airlines
7.8
Good
2,837 reviews
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,509 reviews
Southwest
8.0
Very good
4,331 reviews

Entertainment

7.5

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 2 daily flights to Baltimore from 7 different airlines. 4h 55m 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 16 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 7h 37m. 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 $103. Other airlines that can offer you cheap pricing are Hawaiian Airlines, from $138, and Frontier, from $139. Delta is priced at 74% 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 American Airlines ($89), Delta ($98), and Frontier ($100).

  • 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 Alaska Airlines (90%), Hawaiian Airlines (90%) or Air Tahiti Nui (89%) 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 $786, our data indicates the cheapest price to be $133. The most popular route (Seattle/Tacoma Intl - Baltimore/Washington), is priced around $239.

  • 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, May is the cheapest month in which you can book a flight from Seattle to Baltimore (average of $120). Flying from Seattle to Baltimore in November is currently the most expensive (average of $209). 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.

Top 7 airlines flying from Seattle to Baltimore

Discover the top 7 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 March 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$103Average$342FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$138Average$388FlexibilityNo cancel feeOn-time85%
FrontierCheapest$139Average$229FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$178Average$271FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$187Average$408FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$226Average$393FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$256Average$434FlexibilityNo cancel feeOn-time75%

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