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Cheap flights from Baltimore to Seattle from $159

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Baltimore to Seattle departing on 8/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
10:38 am - 6:37 pm
BWI
-
SEA
10h 59m
1 stop
American Airlines Logo
11:59 pm - 11:09 am
SEA
-
BWI
8h 10m
1 stop
$238American Airlines
Wed, Sep 9 - Thu, Sep 10
Alaska Airlines Logo
6:18 pm - 9:00 pm
BWI
-
SEA
5h 42mnonstop
Alaska Airlines Logo
10:23 pm - 6:30 am
SEA
-
BWI
5h 07mnonstop
$252Alaska Airlines
Thu, Sep 17 - Wed, Sep 23
American Airlines Logo
5:20 pm - 10:59 pm
BWI
-
SEA
8h 39m
1 stop
American Airlines Logo
6:40 am - 7:33 pm
SEA
-
BWI
9h 53m
1 stop
$258American Airlines
Thu, Sep 17 - Sat, Sep 26
Alaska Airlines Logo
6:18 pm - 9:00 pm
BWI
-
SEA
5h 42mnonstop
Alaska Airlines Logo
6:51 pm - 3:40 pm
SEA
-
BWI
17h 49m
1 stop
$262Alaska Airlines
Thu, Sep 24 - Mon, Sep 28
Delta Logo
5:36 pm - 10:05 pm
BWI
-
SEA
7h 29m
1 stop
Delta Logo
5:10 am - 4:49 pm
SEA
-
BWI
8h 39m
1 stop
$263Delta
Sat, Aug 29 - Sat, Sep 5
Alaska Airlines Logo
7:50 am - 10:29 am
BWI
-
SEA
5h 39mnonstop
Alaska Airlines Logo
6:51 pm - 3:40 pm
SEA
-
BWI
17h 49m
1 stop
$268Alaska Airlines
Thu, Sep 24 - Thu, Sep 24
Southwest Logo
9:10 am - 6:35 pm
BWI
-
SEA
12h 25m
1 stop
Southwest Logo
5:50 pm - 6:35 am
SEA
-
BWI
9h 45m
1 stop
$277Southwest
Wed, Aug 26 - Mon, Aug 31
Delta Logo
12:17 pm - 6:45 pm
BWI
-
SEA
9h 28m
1 stop
Delta Logo
6:31 pm - 6:20 am
SEA
-
BWI
8h 49m
1 stop
$278Delta
Sat, Aug 15 - Tue, Aug 18
American Airlines Logo
4:25 pm - 9:59 pm
BWI
-
SEA
8h 34m
1 stop
American Airlines Logo
6:40 am - 7:33 pm
SEA
-
BWI
9h 53m
1 stop
$287American Airlines
Tue, Sep 8 - Tue, Sep 15
Alaska Airlines Logo
6:18 pm - 9:00 pm
BWI
-
SEA
5h 42mnonstop
Alaska Airlines Logo
10:23 pm - 6:30 am
SEA
-
BWI
5h 07mnonstop
$292Alaska Airlines
Wed, Sep 16 - Sun, Sep 20

American Airlines flights from Baltimore to Seattle

Our best American Airlines deals on Baltimore to Seattle flight tickets
American Airlines
Sep 9
BWI10:38 amBaltimore/Washington
10h 59m
1 stop
SEA6:37 pmSeattle/Tacoma Intl
Sep 10
SEA11:59 pmSeattle/Tacoma Intl
8h 10m
1 stop
BWI11:09 amBaltimore/Washington
$238
American Airlines
Sep 17
BWI5:20 pmBaltimore/Washington
8h 39m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
Sep 26
SEA6:40 amSeattle/Tacoma Intl
9h 53m
1 stop
BWI7:33 pmBaltimore/Washington
$258
American Airlines
Sep 8
BWI4:25 pmBaltimore/Washington
8h 34m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
Sep 15
SEA6:40 amSeattle/Tacoma Intl
9h 53m
1 stop
BWI7:33 pmBaltimore/Washington
$287

Delta flights from Baltimore to Seattle

Our best Delta deals on Baltimore to Seattle flight tickets
Delta
Aug 29
BWI5:36 pmBaltimore/Washington
7h 29m
1 stop
SEA10:05 pmSeattle/Tacoma Intl
Sep 5
SEA5:10 amSeattle/Tacoma Intl
8h 39m
1 stop
BWI4:49 pmBaltimore/Washington
$263
Delta
Jul 21
BWI7:10 pmBaltimore/Washington
7h 48m
1 stop
SEA11:58 pmSeattle/Tacoma Intl
Jul 30
SEA7:50 pmSeattle/Tacoma Intl
7h 10m
1 stop
BWI6:00 amBaltimore/Washington
$293
Delta
Jul 13
BWI6:20 pmBaltimore/Washington
8h 39m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
Jul 15
SEA7:50 pmSeattle/Tacoma Intl
7h 10m
1 stop
BWI6:00 amBaltimore/Washington
$299

momondo 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, momondo users made 832,500 searches. Data last updated June 4, 2026.
Use the filters below to find and compare flights from Baltimore to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 9/9

10:38 am-6:37 pm

1 stop10h 59m

Seattle/Tacoma Intl

Thu 9/10

11:59 pm-11:09 am

1 stop8h 10m

$238
Quickest round-trip

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 9/17

6:18 pm-9:00 pm

Nonstop5h 42m

Seattle/Tacoma Intl

Wed 9/23

10:23 pm-6:30 am

Nonstop5h 07m

$252

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 9/17

5:20 pm-10:59 pm

1 stop8h 39m

Seattle/Tacoma Intl

Sat 9/26

6:40 am-7:33 pm

1 stop9h 53m

$258

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 9/24

6:18 pm-9:00 pm

Nonstop5h 42m

Seattle/Tacoma Intl

Mon 9/28

6:51 pm-3:40 pm

1 stop17h 49m

$262

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 8/29

5:36 pm-10:05 pm

1 stop7h 29m

Seattle/Tacoma Intl

Sat 9/5

5:10 am-4:49 pm

1 stop8h 39m

$263

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Thu 9/24

7:50 am-10:29 am

Nonstop5h 39m

Seattle/Tacoma Intl

Thu 9/24

6:51 pm-3:40 pm

1 stop17h 49m

$268

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 8/26

9:10 am-6:35 pm

1 stop12h 25m

Seattle/Tacoma Intl

Mon 8/31

5:50 pm-6:35 am

1 stop9h 45m

$277

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Sat 8/15

12:17 pm-6:45 pm

1 stop9h 28m

Seattle/Tacoma Intl

Tue 8/18

6:31 pm-6:20 am

1 stop8h 49m

$278

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Tue 9/8

4:25 pm-9:59 pm

1 stop8h 34m

Seattle/Tacoma Intl

Tue 9/15

6:40 am-7:33 pm

1 stop9h 53m

$287

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

Wed 9/16

6:18 pm-9:00 pm

Nonstop5h 42m

Seattle/Tacoma Intl

Sun 9/20

10:23 pm-6:30 am

Nonstop5h 07m

$292

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Baltimore to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Baltimore and Seattle?

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Baltimore to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $298. If you don’t want to visit Seattle in February, then you should wait until January to fly from Baltimore, when ticket prices are also cheap, with an average price of $318.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Baltimore is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $452. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Baltimore because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $578.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Baltimore at noon is the least expensive time of day to depart. momondo users have found prices as low as $468 when looking at flights departing at noon. Flights to Seattle are more costly in the evening, with an average ticket price of $544. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Baltimore/Washington to Seattle/Tacoma Intl flight route?

Fly from Baltimore/Washington to Seattle/Tacoma Intl for the best Baltimore/Washington - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $385 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Baltimore for as low as $336 on momondo.

What cabin class options are available on Baltimore to Seattle flights?

There are 4 cabin classes available to choose from on Baltimore to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Baltimore to Seattle flights?

No. A direct flight is the cheapest option for a flight between Baltimore to Seattle.

How have Baltimore to Seattle flight prices changed over time?

As of June 2026, prices for Baltimore to Seattle flights are approximately 18% more expensive when compared to flights at the same time last year.

When to book flights from Baltimore to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Baltimore to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Baltimore to Seattle (BWI to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Baltimore to Seattle

Best Price Found

$230

Fastest flight time

5h 39m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Baltimore in the past 72 hours is $230. The best round-trip flight deal from Baltimore to Seattle found on momondo in the last 72 hours is $427.
The fastest flight from Baltimore to Seattle takes 5h 39m
Direct flights go from Baltimore to Seattle every day.
There is 1 airport in Seattle. From Baltimore there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Baltimore to Seattle

  • How far is Baltimore/Washington to Seattle/Tacoma Intl by plane?

    The straight-line distance from Baltimore/Washington to Seattle/Tacoma Intl is 2326.9 mi. 5h 39m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Baltimore to Seattle?

  • What is the most popular airline from Baltimore to Seattle?

Best airlines flying from Baltimore to Seattle

Compare and see reviews for airlines that fly from Baltimore to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $100Free CancellationRating
7.8
8,398 reviews
Search Delta flights
FrontierPriceFrom $137Free CancellationRating
5.6
2,917 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $158Free CancellationRating
7.8
2,831 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $179Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
JetBluePriceFrom $219Free CancellationRating
7.1
2,984 reviews
Search JetBlue flights
SouthwestPriceFrom $226Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
United AirlinesPriceFrom $228Free CancellationRating
7.4
9,776 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $260Free CancellationRating
7.9
12,464 reviews
Search Alaska Airlines flights
Sun Country AirPriceFrom $295Free CancellationRating
6.8
333 reviews
Search Sun Country Air flights

  • Southwest Flights From Baltimore to Seattle

    The lowest priced Southwest flight from Baltimore to Seattle from the last 72 hours was $226. Generally, Southwest has 1 flight on this route every week with an average price of $451. Southwest is rated 8.0/10 by our users.

  • Alaska Airlines Flights From Baltimore to Seattle

    The best Alaska Airlines deal for Baltimore to Seattle flight tickets found on momondo in the last 72 hours was $260, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $436 round-trip. Alaska Airlines operates 3 flights out of Baltimore into Seattle in an average week, so prices vary by time and availability. 12,464 Alaska Airlines reviews by users on momondo have scored the airline at 7.9/10.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Redmond
Kent
Lakewood
Tukwila
Puyallup
Marysville
Cle Elum
Federal Way
Fife
Centralia
Shoreline
Westport
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Baltimore to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Baltimore to Seattle. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Baltimore to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Baltimore to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Baltimore to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Baltimore to Seattle.

I’m not ready to book a flight from Baltimore to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Baltimore to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Seattle trip

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