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$140+ 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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
BWI — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Baltimore/Washington to Seattle/Tacoma Intl are usually found in January or September, booked 24 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 June 12, 2025.

Round-trip from

$227
(Delta)

One-way from

$140
(Delta)

Popular in

December

Cheapest in

January

Average price

$478
From Baltimore/Washington to Seattle/Tacoma Intl
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One-way flight from Baltimore/Washington to Seattle/Tacoma Intl
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Delta deal was found by Cheapflights users on 6/10. 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.
Sat 9/207:15 amBWI - SEA
1 stop10h 44mDelta
Mon 9/297:33 pmSEA - BWI
1 stop7h 29mDelta
Deal found 6/10$227
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Tue 9/26:20 pmBWI - SEA
1 stop8h 20mAmerican Airlines
Tue 9/93:00 pmSEA - BWI
1 stop16h 54mAmerican Airlines
Deal found 6/11$231
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2110:51 amBWI - SEA
2 stops10h 11mUnited Airlines
Sun 11/211:50 pmSEA - BWI
1 stop7h 09mUnited Airlines
Deal found 6/10$256
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/86:00 amBWI - SEA
1 stop12h 03mSpirit Airlines
Sat 7/125:30 pmSEA - BWI
1 stop9h 35mSpirit Airlines
Deal found 6/11$257
This Frontier deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/196:49 pmBWI - SEA
1 stop8h 42mFrontier
Mon 9/226:00 amSEA - BWI
1 stop9h 04mFrontier
Deal found 6/10$260
This FlightHub deal was found by Cheapflights users on 6/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/38:00 amBWI - SEA
1 stop10h 53mMultiple Airlines
Mon 9/86:00 amSEA - BWI
1 stop9h 04mMultiple Airlines
Deal found 6/10$263
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/147:22 pmBWI - SEA
Nonstop5h 43mAlaska Airlines
Tue 9/239:29 pmSEA - BWI
Nonstop5h 04mAlaska Airlines
Deal found 6/10$277
This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1912:25 pmBWI - SEA
1 stop13h 22mSun Country Air
Fri 7/2511:59 pmSEA - BWI
1 stop8h 24mSun Country Air
Deal found 6/10$304
This Southwest deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:25 amBWI - SEA
1 stop10h 15mSouthwest
Sun 9/79:10 pmSEA - BWI
Nonstop5h 00mSouthwest
Deal found 6/9$327
This CheapTicketsDeal deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapTicketsDeal is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:10 pmBWI - SEA
Nonstop5h 50mHawaiian Airlines
Tue 7/1510:20 pmSEA - BWI
Nonstop4h 59mHawaiian Airlines
Deal found 6/9$349

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 June 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

Mon 8/25

7:15 am-2:43 pm

1 stop10h 28m

Seattle/Tacoma Intl

Sat 9/6

5:45 pm-6:00 am

1 stop9h 15m

$227

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 9/2

6:20 pm-11:40 pm

1 stop8h 20m

Seattle/Tacoma Intl

Tue 9/9

3:00 pm-10:54 am

1 stop16h 54m

$231

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 9/3

10:51 am-6:49 pm

2 stops10h 58m

Seattle/Tacoma Intl

Sat 9/6

11:54 pm-9:55 am

1 stop7h 01m

$256

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 7/8

6:00 am-3:03 pm

1 stop12h 03m

Seattle/Tacoma Intl

Thu 7/10

5:30 pm-6:05 am

1 stop9h 35m

$257

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sun 9/7

6:49 pm-12:31 am

1 stop8h 42m

Seattle/Tacoma Intl

Mon 9/15

6:00 am-6:04 pm

1 stop9h 04m

$260

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 9/3

8:00 am-3:53 pm

1 stop10h 53m

Seattle/Tacoma Intl

Mon 9/8

6:00 am-6:04 pm

1 stop9h 04m

$263

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 8/30

7:22 pm-10:05 pm

Nonstop5h 43m

Seattle/Tacoma Intl

Sat 9/6

9:29 pm-5:33 am

Nonstop5h 04m

$277

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sun 8/24

9:25 am-12:10 pm

Nonstop5h 45m

Seattle/Tacoma Intl

Thu 8/28

12:05 pm-11:10 pm

1 stop8h 05m

$287

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 7/19

12:25 pm-10:47 pm

1 stop13h 22m

Seattle/Tacoma Intl

Fri 7/25

11:59 pm-11:23 am

1 stop8h 24m

$304

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Fri 8/29

7:22 pm-10:05 pm

Nonstop5h 43m

Seattle/Tacoma Intl

Fri 9/5

9:29 pm-5:33 am

Nonstop5h 04m

$317

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 19 results
1
2

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 June 9, 2025.

The best time to book flights from Baltimore to Seattle is 24 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 $391). 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 June 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 12% 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 June 8, 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.

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Crew

8.5

Overall

8.0

Comfort

7.8

Boarding

8.1

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 40m 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 31 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, Delta ($227), American Airlines ($231), and United Airlines ($256) offers the cheapest pricing from Baltimore to Seattle. Delta is 45% 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 $140 on Delta. Other airlines that offer cheap prices include Sun Country Air from $145 and United Airlines from $150 one-way.

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

    Consider Finnair (71%), Alaska Airlines (59%) or Hawaiian Airlines (59%) 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 $168. On average you can expect to pay $1,830. The most popular route, (Baltimore/Washington - Seattle/Tacoma Intl), can usually be booked for $207.

  • 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 NASCAR Hall of Fame. Carowind, Mint Museum Uptown, and NASCAR Hall of Fame are located about 8.2 mi, 5.4 mi, and 5.7 mi, respectively from Charlotte Douglas. Travelers can rent a car at Charlotte Douglas for an average daily rate of $48 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, River North, and Grant Park. Magnificent Mile, River North and Grant Park are located about 15.5 mi, 15.0 mi, and 16.2 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 $56 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 $391). 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
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$220FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$140Average$262FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$206Average$384FlexibilityNo cancel feeOn-time71%
DeltaCheapest$206Average$325FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$244Average$402FlexibilityNo cancel feeOn-time83%
Hawaiian AirlinesCheapest$244Average$422FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$273Average$420FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$277Average$473FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$337Average$519FlexibilityNo cancel feeOn-time63%

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