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$114+ Cheap flights from Baltimore to Seattle (BWI - SEA)

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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Nov 26 — Dec 31
Wed 11/26
Wed 12/3
1 adult, Economy
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Find cheap flights from Baltimore to Seattle with Cheapflights

1. Tell us where you want to go

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3. Compare prices and book

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Cheapflights Tip: The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or September, booked 47 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Find flight deals from Baltimore to Seattle

Cheapest flights from Baltimore to Seattle
Explore the most affordable flight options available from Baltimore to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 27, 2025.

This Delta deal was found by Cheapflights users on 10/26. 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.
Thu 11/137:15 amBWI - SEA
1 stop8h 41mDelta
Mon 11/177:12 pmSEA - BWI
1 stop7h 46mDelta
Deal found 10/26$228
This Southwest deal was found by Cheapflights users on 10/26. 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 11/156:20 amBWI - SEA
1 stop7h 50mSouthwest
Sat 1/1710:45 amSEA - BWI
1 stop6h 45mSouthwest
Deal found 10/26$229
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/35:45 amBWI - SEA
1 stop31h 21mMultiple Airlines
Mon 12/153:40 pmSEA - BWI
2 stops14h 42mMultiple Airlines
Deal found 10/26$230
This Kiwi.com deal was found by Cheapflights users on 10/25. 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.
Wed 12/35:45 amBWI - SEA
1 stop31h 21mMultiple Airlines
Sun 12/1412:48 pmSEA - BWI
2 stops19h 07mMultiple Airlines
Deal found 10/25$232
This Southwest deal was found by Cheapflights users on 10/27. 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 11/156:20 amBWI - SEA
1 stop7h 50mSouthwest
Tue 11/185:40 amSEA - BWI
2 stops8h 20mSouthwest
Deal found 10/27$234
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amBWI - SEA
1 stop15h 32mMultiple Airlines
Wed 11/191:37 pmSEA - BWI
2 stops25h 06mMultiple Airlines
Deal found 10/26$236
This Delta deal was found by Cheapflights users on 10/26. 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.
Wed 11/126:00 amBWI - SEA
1 stop7h 46mDelta
Mon 11/177:12 pmSEA - BWI
1 stop7h 46mDelta
Deal found 10/26$238
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:12 pmBWI - SEA
1 stop8h 16mUnited Airlines
Sun 11/163:37 pmSEA - BWI
1 stop11h 03mUnited Airlines
Deal found 10/26$239
This United Airlines deal was found by Cheapflights users on 10/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:35 pmBWI - SEA
1 stop9h 24mUnited Airlines
Sat 11/155:05 amSEA - BWI
2 stops9h 09mUnited Airlines
Deal found 10/25$240
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amBWI - SEA
1 stop15h 32mMultiple Airlines
Sat 11/1512:58 pmSEA - BWI
2 stops18h 15mMultiple Airlines
Deal found 10/26$242
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/104:20 pmBWI - SEA
2 stops11h 39mUnited Airlines
Fri 11/1411:30 pmSEA - BWI
1 stop7h 29mUnited Airlines
Deal found 10/26$244
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/146:00 amBWI - SEA
1 stop15h 32mMultiple Airlines
Tue 11/181:37 pmSEA - BWI
2 stops25h 52mMultiple Airlines
Deal found 10/26$246

Cheap flight deals from Baltimore to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Baltimore (BWI) to Seattle (SEA). 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 October 27, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$228
(American Airlines)

One-way from

$114
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$387
Provider with most accurate pricing for Baltimore/Washington-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Baltimore/Washington-Seattle/Tacoma Intl flights.
Search Deals
From Baltimore/Washington to Seattle/Tacoma Intl
Search Deals
One-way flight from Baltimore/Washington to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Baltimore to Seattle 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 October 27, 2025.
Use the filters below to find and compare flights from Baltimore to Seattle that are best for you.

Fly from

Baltimore

Fly to

Seattle

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 11/12

5:12 pm-10:28 pm

1 stop8h 16m

Seattle/Tacoma Intl

Sun 11/16

3:37 pm-5:40 am

1 stop11h 03m

$239

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 11/12

10:10 am-6:25 pm

2 stops11h 15m

Seattle/Tacoma Intl

Fri 11/14

11:30 pm-9:59 am

1 stop7h 29m

$244

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 11/10

10:10 am-6:25 pm

2 stops11h 15m

Seattle/Tacoma Intl

Thu 11/20

5:05 am-3:10 pm

1 stop7h 05m

$244

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 11/12

6:00 am-10:46 am

1 stop7h 46m

Seattle/Tacoma Intl

Mon 11/17

7:12 pm-5:58 am

1 stop7h 46m

$248

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 12/10

5:36 pm-10:25 pm

1 stop7h 49m

Seattle/Tacoma Intl

Thu 12/18

6:00 am-5:23 pm

1 stop8h 23m

$249

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 12/4

6:21 pm-11:59 pm

1 stop8h 38m

Seattle/Tacoma Intl

Wed 12/17

12:05 pm-10:02 am

2 stops18h 57m

$253

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 12/5

6:00 am-6:26 pm

2 stops15h 26m

Seattle/Tacoma Intl

Fri 12/12

5:00 pm-6:00 am

1 stop10h 00m

$256

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 11/11

6:58 pm-12:01 am

1 stop8h 03m

Seattle/Tacoma Intl

Wed 11/19

2:25 pm-10:02 am

2 stops16h 37m

$274

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 11/11

6:58 pm-12:01 am

1 stop8h 03m

Seattle/Tacoma Intl

Tue 11/18

9:43 am-9:22 am

2 stops20h 39m

$274

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 12/10

7:00 am-10:02 am

Nonstop6h 02m

Seattle/Tacoma Intl

Mon 12/15

9:38 pm-5:40 am

Nonstop5h 02m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 22 results
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Compare providers for flights from Baltimore to Seattle

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 Baltimore to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
MytripPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Baltimore-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Baltimore-Seattle flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Baltimore-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Baltimore-Seattle flights, Cheapflights users trust CheapOair the most. CheapOair 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 Baltimore-Seattle 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 Baltimore to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Baltimore 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 Baltimore to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Baltimore to Seattle. Price data was last updated on October 24, 2025.

The best time to book flights from Baltimore to Seattle is 46 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 Baltimore to Seattle?

Currently, March is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $109). Flying from Baltimore to Seattle in July is currently the most expensive (average of $232). 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 BWI to SEA?

Find hourly flight availability from Baltimore to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 27, 2025.

A simple way to save on the total cost of your ticket is to fly from Baltimore to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Baltimore to Seattle. Price data was last updated on October 26, 2025.

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

The best insider tips for Baltimore to Seattle 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 Baltimore to Seattle trip
Airports
BWI

For long-term parking, choose the budget-friendly Long Term Parking lots. Allow extra time for shuttle transfers to the terminal.

Read more about BWIby Emily Zemler
SEA

Use the Link light rail for a cost-effective trip to downtown Seattle. It runs every 10 minutes and takes less than 40 minutes.

Read more about SEAby Brandon Schultz
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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated October 27, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest, and Delta from Baltimore to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,193 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,996 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,792 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,999 reviews
Alaska Airlines
8.0
Very good
11,193 reviews

Food

7.1

Entertainment

7.0

Boarding

8.1

Crew

8.5

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

Find useful and relevant information for your journey from Baltimore to Seattle. 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 Baltimore to Seattle?

    To fly from Baltimore to Seattle, you need to book a flight from Baltimore/Washington (BWI) to Seattle/Tacoma Intl (SEA). Nonstop flights to Seattle/Tacoma Intl from Baltimore/Washington take 5h 51m on average. When it comes time to book airfare, you have a few options: there are 3 outbound flights from Baltimore/Washington to Seattle/Tacoma Intl offered by 9 different airlines.

  • How popular is this Baltimore to Seattle flight route?

    The Baltimore/Washington to Seattle/Tacoma Intl flight path was viewed by 28 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 Baltimore to Seattle?

    For as low as $248, United Airlines can have you in Seattle from Baltimore in 7h 46m. Baltimore and Seattle are separated by a distance of 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 Baltimore to Seattle round-trip?

    According to our current data, Spirit Airlines ($126), Frontier ($137), and Delta ($204) offers the cheapest pricing from Baltimore to Seattle. Spirit Airlines is 69% cheaper than the average price of flights available within the next 90 days to this destination.

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

    Consider Finnair (100%), Southwest (92%) or Alaska Airlines (89%) when booking your flight. These represent the most reliable airlines when flying from Baltimore to Seattle.

  • What are the cheapest flights from Baltimore to Seattle?

    The cheapest flight price from Baltimore to Seattle is $148. On average you can expect to pay $1,036. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $170.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Baltimore to Seattle 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 Baltimore to Seattle?

    Currently, March is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $109). Flying from Baltimore to Seattle in July is currently the most expensive (average of $232). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Fife
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Baltimore to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Baltimore to Seattle

Discover the top 9 airlines that operate flights from Baltimore to Seattle. 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 October 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$126Average$275FlexibilityNo cancel feeOn-time65%
FrontierCheapest$137Average$242FlexibilityNo cancel feeOn-time62%
DeltaCheapest$204Average$309FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$370FlexibilityNo cancel feeOn-time71%
Hawaiian AirlinesCheapest$231Average$417FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$238Average$492FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$238Average$408FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$279Average$471FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$313Average$402FlexibilityNo cancel feeOn-time83%

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