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$143+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Mar 17 — Mar 241
Mon 3/17
Mon 3/24
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
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3. Compare prices and book
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The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or February, booked 77 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

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 March 12, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$214
(Booking.com)

One-way from

$143
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$456
Provider with most accurate pricing for Baltimore/Washington-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Baltimore/Washington-Seattle/Tacoma Intl flights.
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From Baltimore/Washington to Seattle/Tacoma Intl
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One-way flight from Baltimore/Washington to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 12, 2025.

This Booking.com deal was found by Cheapflights users on 3/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/279:42 pmBWI - SEA
1 stop15h 22mMultiple Airlines
Mon 3/318:04 pmSEA - BWI
1 stop19h 07mMultiple Airlines
Deal found 3/12$214
This Booking.com deal was found by Cheapflights users on 3/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/256:30 amBWI - SEA
1 stop15h 39mSpirit Airlines
Mon 3/318:04 pmSEA - BWI
1 stop19h 07mSpirit Airlines
Deal found 3/11$215
This CheapOair deal was found by Cheapflights users on 3/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:23 pmBWI - SEA
1 stop10h 14mFrontier
Wed 5/286:25 amSEA - BWI
1 stop7h 03mFrontier
Deal found 3/11$220
This Delta deal was found by Cheapflights users on 3/12. 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 4/33:00 pmBWI - SEA
1 stop8h 42mDelta
Mon 4/146:59 pmSEA - BWI
1 stop7h 51mDelta
Deal found 3/12$233
This American Airlines deal was found by Cheapflights users on 3/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/77:08 pmBWI - SEA
1 stop8h 43mAmerican Airlines
Mon 4/2811:59 pmSEA - BWI
1 stop8h 13mAmerican Airlines
Deal found 3/10$252
This Alaska Airlines deal was found by Cheapflights users on 3/11. 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.
Tue 4/227:06 amBWI - SEA
Nonstop5h 39mAlaska Airlines
Wed 4/239:40 pmSEA - BWI
Nonstop5h 06mAlaska Airlines
Deal found 3/11$257
This Hawaiian Airlines deal was found by Cheapflights users on 3/12. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/237:05 pmBWI - SEA
Nonstop5h 40mHawaiian Airlines
Mon 4/289:40 pmSEA - BWI
Nonstop5h 06mHawaiian Airlines
Deal found 3/12$278
This Sun Country Air deal was found by Cheapflights users on 3/12. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:23 pmBWI - SEA
1 stop7h 53mSun Country Air
Sun 9/286:10 pmSEA - BWI
1 stop14h 10mSun Country Air
Deal found 3/12$295
This Southwest deal was found by Cheapflights users on 3/11. 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.
Tue 6/105:55 pmBWI - SEA
1 stop8h 20mSouthwest
Wed 6/119:10 pmSEA - BWI
Nonstop5h 00mSouthwest
Deal found 3/11$312
This United Airlines deal was found by Cheapflights users on 3/12. 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 5/216:35 pmBWI - SEA
1 stop9h 24mUnited Airlines
Sat 5/3111:50 pmSEA - BWI
1 stop7h 13mUnited Airlines
Deal found 3/12$345

Find flights from Baltimore to Seattle within your budget

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 March 12, 2025.

Fly from

Baltimore

Fly to

Seattle

Route

Depart

Return

Price

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 3/27

9:42 pm-10:04 am

1 stop15h 22m

Seattle/Tacoma Intl

Mon 3/31

8:04 pm-6:11 pm

1 stop19h 07m

$214

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 3/25

6:30 am-7:09 pm

1 stop15h 39m

Seattle/Tacoma Intl

Mon 3/31

8:04 pm-6:11 pm

1 stop19h 07m

$215

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 5/24

5:23 pm-12:37 am

1 stop10h 14m

Seattle/Tacoma Intl

Wed 5/28

6:25 am-4:28 pm

1 stop7h 03m

$220

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 4/3

3:00 pm-8:42 pm

1 stop8h 42m

Seattle/Tacoma Intl

Mon 4/14

6:59 pm-5:50 am

1 stop7h 51m

$233

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 4/7

7:08 pm-12:51 am

1 stop8h 43m

Seattle/Tacoma Intl

Fri 4/11

1:35 pm-12:24 am

1 stop7h 49m

$252

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 4/22

7:06 am-9:45 am

Nonstop5h 39m

Seattle/Tacoma Intl

Wed 4/23

9:40 pm-5:46 am

Nonstop5h 06m

$257

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 4/26

7:06 am-9:45 am

Nonstop5h 39m

Seattle/Tacoma Intl

Sat 5/3

9:40 pm-5:46 am

Nonstop5h 06m

$311

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 6/10

5:55 pm-11:15 pm

1 stop8h 20m

Seattle/Tacoma Intl

Wed 6/11

9:10 pm-5:10 am

Nonstop5h 00m

$312

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 5/21

6:35 pm-12:59 am

1 stop9h 24m

Seattle/Tacoma Intl

Sat 5/31

11:50 pm-10:03 am

1 stop7h 13m

$345

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Mon 3/31

6:05 am-7:09 pm

3 stops40h 04m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/12

Showing 1-10 of 18 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
FareScanPrice Accuracy-Trust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
FlightnetworkPrice Accuracy-Trust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Baltimore-Seattle flight deals on Cheapflights vs. FlightHub >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 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 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.

Travel insights for flights from Baltimore to Seattle

Get recent, data-driven insights about flights from Baltimore to Seattle including ideal travel times, pricing trends, and more.

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 March 7, 2025.

The best time to book flights from Baltimore to Seattle is 77 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, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in July is currently the most expensive (average of $411). 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 March 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Baltimore to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% 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 March 9, 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. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 March 12, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Baltimore to Seattle to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,297 reviews
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Alaska Airlines
8.0
Very good
9,732 reviews
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
7,953 reviews
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Hawaiian Airlines
7.9
Good
2,320 reviews
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,623 reviews
Southwest
8.1
Very good
4,297 reviews

Crew

8.7

Food

7.1

Overall

8.1

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 39m on average. When it comes time to book airfare, you have a few options: there are 2 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 21 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    According to our current data, Spirit Airlines ($215), Frontier ($220), and Delta ($233) offers the cheapest pricing from Baltimore to Seattle. Spirit Airlines is 49% 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 $143 on Spirit Airlines. Other airlines that offer cheap prices include United Airlines from $144 and Hawaiian Airlines from $149 one-way.

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

    Consider Air Tahiti Nui (71%), Hawaiian Airlines (68%) or Alaska Airlines (67%) 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 $142. On average you can expect to pay $999. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $184.

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

    Most of the time, Baltimore to Seattle flights that have layovers will stop in Charlotte. Charlotte is followed by Chicago in terms of the most popular layover location on flights from Baltimore to Seattle.

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

    Most Charlotte visitors opt to spend their time experiencing Carowind, Mint Museum Uptown, and North Carolina Blumenthal Performing Arts Center. Carowind, Mint Museum Uptown, and North Carolina Blumenthal Performing Arts Center are located about 8.2 mi, 5.4 mi, and 5.8 mi, respectively from Charlotte Douglas. Travelers can rent a car at Charlotte Douglas for an average daily rate of $45 to make sightseeing during their layover a little easier.

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

    The majority of Chicago visitors spend their time at Magnificent Mile, Grant Park, and River North. Magnificent Mile, Grant Park and River North are located about 15.5 mi, 16.2 mi, and 15.0 mi, respectively from Chicago O'Hare Intl if you are interested in checking them out. Those looking to explore during their layover in Chicago can rent a car from Chicago O'Hare Intl for about $50 per day.

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

    Baltimore to Seattle flights have a layover in Minneapolis least often.

  • 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, January is the cheapest month in which you can book a flight from Baltimore to Seattle (average of $238). Flying from Baltimore to Seattle in July is currently the most expensive (average of $411). 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 Baltimore?

Book flights to Baltimore if you plan to visit one of these locations
SeaTac
Tukwila
Renton
Lacey
Ocean Shores
Tacoma
Leavenworth
Federal Way
Lakewood
Centralia
Olympia
Cle Elum
Mukilteo
Aberdeen
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale
Redmond

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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 March 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$90Average$188FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$156Average$262FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$184Average$368FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$206Average$398FlexibilityNo cancel feeOn-time71%
DeltaCheapest$206Average$375FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$277Average$489FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$277Average$428FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$297Average$498FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$364Average$595FlexibilityNo cancel feeOn-time63%
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