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$97+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Baltimore to Seattle 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

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Cheapflights Tip: The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or November, booked 60 days in advance, depart on a Tuesday or Thursday and return on a Wednesday

Cheap 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 December 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:04 amBWI - SEA
Nonstop5h 51mAlaska Airlines
Tue 1/1310:11 amSEA - BWI
Nonstop5h 03mAlaska Airlines
Deal found 12/11$368
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:04 amBWI - SEA
Nonstop5h 51mAlaska Airlines
Mon 1/59:39 pmSEA - BWI
Nonstop5h 05mAlaska Airlines
Deal found 12/11$388
This Southwest deal was found by Cheapflights users on 12/10. 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.
Wed 12/1712:35 pmBWI - SEA
2 stops11h 05mSouthwest
Mon 1/55:55 pmSEA - BWI
1 stop8h 50mSouthwest
Deal found 12/10$393
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:55 amBWI - SEA
2 stops14h 12mUnited Airlines
Thu 1/111:59 pmSEA - BWI
1 stop6h 49mUnited Airlines
Deal found 12/11$402
This Southwest deal was found by Cheapflights users on 12/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:05 pmBWI - SEA
2 stops12h 50mSouthwest
Sat 1/105:15 amSEA - BWI
1 stop6h 50mSouthwest
Deal found 12/11$403
This Delta deal was found by Cheapflights users on 12/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:15 amBWI - SEA
1 stop10h 44mDelta
Fri 1/96:05 amSEA - BWI
1 stop7h 33mDelta
Deal found 12/11$418
This Southwest deal was found by Cheapflights users on 12/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:25 pmBWI - SEA
1 stop14h 55mSouthwest
Sat 1/1010:45 amSEA - BWI
1 stop6h 45mSouthwest
Deal found 12/11$424
This American Airlines deal was found by Cheapflights users on 12/11. 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.
Wed 12/246:42 amBWI - SEA
1 stop8h 55mAmerican Airlines
Thu 1/16:00 amSEA - BWI
1 stop8h 02mAmerican Airlines
Deal found 12/11$428
This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:00 amBWI - SEA
1 stop11h 52mUnited Airlines
Thu 1/85:00 amSEA - BWI
1 stop7h 04mUnited Airlines
Deal found 12/11$429
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:04 amBWI - SEA
Nonstop5h 51mAlaska Airlines
Sat 1/1010:11 amSEA - BWI
Nonstop5h 03mAlaska Airlines
Deal found 12/11$438
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:00 amBWI - SEA
1 stop7h 54mDelta
Thu 12/257:30 pmSEA - BWI
1 stop7h 15mDelta
Deal found 12/10$449

Find 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 December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$228
(American Airlines)

One-way from

$97
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$463
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. 12% potential increase in price ($53 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 December 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 December 12, 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

Fri 2/27

6:40 pm-12:55 am

1 stop9h 15m

Seattle/Tacoma Intl

Sun 3/1

6:30 am-12:15 am

1 stop14h 45m

$253

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 2/4

7:14 pm-10:14 pm

Nonstop6h 00m

Seattle/Tacoma Intl

Sat 2/7

10:11 am-6:14 pm

Nonstop5h 03m

$257

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 1/19

8:42 am-3:44 pm

1 stop10h 02m

Seattle/Tacoma Intl

Wed 1/21

5:00 am-3:04 pm

1 stop7h 04m

$259

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 1/7

10:05 am-9:15 pm

2 stops14h 10m

Seattle/Tacoma Intl

Wed 1/14

5:00 am-3:04 pm

1 stop7h 04m

$264

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 1/12

5:10 pm-10:30 pm

1 stop8h 20m

Seattle/Tacoma Intl

Wed 1/21

6:05 am-5:30 pm

2 stops8h 25m

$264

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 1/9

7:14 pm-10:14 pm

Nonstop6h 00m

Seattle/Tacoma Intl

Tue 1/13

10:11 am-6:14 pm

Nonstop5h 03m

$277

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 2/13

6:05 am-12:23 pm

1 stop9h 18m

Seattle/Tacoma Intl

Mon 2/16

11:15 pm-10:32 am

1 stop8h 17m

$278

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 1/26

5:25 pm-9:49 pm

1 stop7h 24m

Seattle/Tacoma Intl

Thu 1/29

7:25 am-11:26 pm

2 stops13h 01m

$286

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 1/10

10:05 am-6:26 pm

2 stops11h 21m

Seattle/Tacoma Intl

Sat 1/17

8:40 am-9:21 pm

2 stops9h 41m

$309

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 3/4

4:00 pm-10:35 pm

1 stop9h 35m

Seattle/Tacoma Intl

Sun 3/8

11:55 pm-12:05 pm

2 stops9h 10m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 23 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 December.
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 December 5, 2025.

The best time to book flights from Baltimore to Seattle is 60 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 $103). Flying from Baltimore to Seattle in July is currently the most expensive (average of $231). 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 December 12, 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 December 6, 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 afternoons 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

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 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 December 12, 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
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,429 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Southwest
7.9
Good
4,252 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,818 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,429 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

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 45m on average. When it comes time to book airfare, you have a few options: there are 4 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 26 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 $257, Southwest can have you in Seattle from Baltimore in 6h. 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 ($102), Delta ($129), and Frontier ($134) offers the cheapest pricing from Baltimore to Seattle. Spirit Airlines is 74% cheaper than the average price of flights available within the next 90 days to this destination.

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

    One-way options have recently been found by users for as low as $76 on Spirit Airlines. Other airlines that offer cheap prices include American Airlines from $89 and Delta from $99 one-way.

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

    Consider Alaska Airlines (85%), Hawaiian Airlines (85%) or Air Tahiti Nui (85%) 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 $138. On average you can expect to pay $420. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $178.

  • 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 $103). Flying from Baltimore to Seattle in July is currently the most expensive (average of $231). 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
Tacoma
SeaTac
Lakewood
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$125Average$277FlexibilityNo cancel feeOn-time65%
FrontierCheapest$148Average$250FlexibilityNo cancel feeOn-time62%
DeltaCheapest$196Average$310FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$206Average$361FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$397FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$231Average$417FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$236Average$480FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$277Average$466FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$313Average$402FlexibilityNo cancel feeOn-time83%

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