Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Baltimore to Seattle from $99

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 9/24. 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
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Baltimore to Seattle

Cheap round-trip flights

Frontier Logo
6:27 pm - 12:30 amBWI-SEA
9h 03m1 stop
Frontier Logo
6:12 am - 9:14 pmSEA-BWI
36h 02m2 stops
$214Frontier
Find Deal
vie., sep. 26 - dom., oct. 5
Frontier Logo
6:27 pm - 12:30 amBWI-SEA
9h 03m1 stop
Frontier Logo
1:02 pm - 11:53 pmSEA-BWI
31h 51m2 stops
$215Frontier
Find Deal
vie., oct. 3 - mar., oct. 7
Frontier Logo
6:27 pm - 12:30 amBWI-SEA
9h 03m1 stop
Frontier Logo
6:12 am - 5:42 pmSEA-BWI
8h 30m1 stop
$218Frontier
Find Deal
vie., oct. 3 - lun., oct. 6
Delta Logo
6:22 pm - 11:54 pmBWI-SEA
8h 32m1 stop
Delta Logo
6:00 am - 4:54 pmSEA-BWI
7h 54m1 stop
$227Delta
Find Deal
mié., oct. 1 - mar., oct. 7
Alaska Airlines Logo
7:00 am - 9:40 amBWI-SEA
5h 40mnonstop
Alaska Airlines Logo
7:30 pm - 6:00 amSEA-BWI
7h 30m1 stop
$228Alaska Airlines
Find Deal
sáb., sep. 27 - vie., oct. 3
Alaska Airlines Logo
7:37 pm - 10:27 pmBWI-SEA
5h 50mnonstop
Alaska Airlines Logo
9:29 pm - 5:39 amSEA-BWI
5h 10mnonstop
$243Alaska Airlines
Find Deal
jue., sep. 25 - lun., sep. 29
Southwest Logo
6:45 pm - 9:30 pmBWI-SEA
5h 45mnonstop
Southwest Logo
9:10 pm - 5:10 amSEA-BWI
5h 00mnonstop
$252Southwest
Find Deal
jue., sep. 25 - mié., oct. 1
Southwest Logo
6:45 pm - 9:30 pmBWI-SEA
5h 45mnonstop
Southwest Logo
2:55 pm - 5:00 amSEA-BWI
11h 05m1 stop
$253Southwest
Find Deal
lun., sep. 22 - mar., sep. 30
Hawaiian Airlines Logo
7:37 pm - 10:27 pmBWI-SEA
5h 50mnonstop
Hawaiian Airlines Logo
5:45 pm - 6:00 amSEA-BWI
9h 15m1 stop
$256Hawaiian Airlines
Find Deal
jue., sep. 25 - mié., oct. 1
Delta Logo
7:01 am - 2:37 pmBWI-SEA
10h 36m1 stop
Delta Logo
6:00 am - 6:06 pmSEA-BWI
9h 06m1 stop
$263Delta
Find Deal
jue., nov. 27 - vie., nov. 28

Frontier flights from Baltimore to Seattle

Our best Frontier deals on Baltimore to Seattle flight tickets
Frontier
Sep 26
BWI6:27 pmBaltimore/Washington
9h 03m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Oct 5
SEA6:12 amSeattle/Tacoma Intl
36h 02m
2 stops
BWI9:14 pmBaltimore/Washington
$214
Find similar
Frontier
Oct 3
BWI6:27 pmBaltimore/Washington
9h 03m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Oct 7
SEA1:02 pmSeattle/Tacoma Intl
31h 51m
2 stops
BWI11:53 pmBaltimore/Washington
$215
Find similar
Frontier
Oct 3
BWI6:27 pmBaltimore/Washington
9h 03m
1 stop
SEA12:30 amSeattle/Tacoma Intl
Oct 6
SEA6:12 amSeattle/Tacoma Intl
8h 30m
1 stop
BWI5:42 pmBaltimore/Washington
$218
Find similar

Delta flights from Baltimore to Seattle

Our best Delta deals on Baltimore to Seattle flight tickets
Delta
Oct 1
BWI6:22 pmBaltimore/Washington
8h 32m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
Oct 7
SEA6:00 amSeattle/Tacoma Intl
7h 54m
1 stop
BWI4:54 pmBaltimore/Washington
$227
Find similar
Delta
Nov 27
BWI7:01 amBaltimore/Washington
10h 36m
1 stop
SEA2:37 pmSeattle/Tacoma Intl
Nov 28
SEA6:00 amSeattle/Tacoma Intl
9h 06m
1 stop
BWI6:06 pmBaltimore/Washington
$263
Find similar

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 septiembre 3, 2025.
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

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

vie. 9/26

6:27 pm-12:30 am

1 stop9h 03m

Seattle/Tacoma Intl

dom. 10/5

6:12 am-9:14 pm

2 stops36h 02m

$214

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

vie. 10/3

6:27 pm-12:30 am

1 stop9h 03m

Seattle/Tacoma Intl

mar. 10/7

1:02 pm-11:53 pm

2 stops31h 51m

$215

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

vie. 10/3

6:27 pm-12:30 am

1 stop9h 03m

Seattle/Tacoma Intl

lun. 10/6

6:12 am-5:42 pm

1 stop8h 30m

$218

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

mié. 10/1

6:22 pm-11:54 pm

1 stop8h 32m

Seattle/Tacoma Intl

mar. 10/7

6:00 am-4:54 pm

1 stop7h 54m

$227

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

sáb. 9/27

7:00 am-9:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

vie. 10/3

7:30 pm-6:00 am

1 stop7h 30m

$228

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

jue. 9/25

7:37 pm-10:27 pm

Nonstop5h 50m

Seattle/Tacoma Intl

lun. 9/29

9:29 pm-5:39 am

Nonstop5h 10m

$243

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

jue. 9/25

6:45 pm-9:30 pm

Nonstop5h 45m

Seattle/Tacoma Intl

mié. 10/1

9:10 pm-5:10 am

Nonstop5h 00m

$252

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

lun. 9/22

6:45 pm-9:30 pm

Nonstop5h 45m

Seattle/Tacoma Intl

mar. 9/30

2:55 pm-5:00 am

1 stop11h 05m

$253

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

jue. 9/25

7:37 pm-10:27 pm

Nonstop5h 50m

Seattle/Tacoma Intl

mié. 10/1

5:45 pm-6:00 am

1 stop9h 15m

$256

BaltimoreSeattle

BWI - SEA

BWISEA

Baltimore/Washington

jue. 11/27

7:01 am-2:37 pm

1 stop10h 36m

Seattle/Tacoma Intl

vie. 11/28

6:00 am-6:06 pm

1 stop9h 06m

$263

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 cheapest month to fly to Seattle?

In general, January 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 $306. If you don’t want to visit Seattle in January, then you should wait until September to fly from Baltimore, when ticket prices are also cheap, with an average price of $360.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $441. 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 $574.

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

Flying to Seattle from Baltimore in the evening is the least expensive time of day to depart. momondo users have found prices as low as $423 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $519. Departure times in the morning 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 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 $408 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 $329 on momondo.

What cabin class options are available on Baltimore/Washington to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Baltimore/Washington to Seattle/Tacoma Intl 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 September 2025, prices for Baltimore to Seattle flights are approximately 30% cheaper 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

$138

Fastest flight time

5h 40m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Baltimore in the past 72 hours is $138. The best round-trip flight deal from Baltimore to Seattle found on momondo in the last 72 hours is $358.
The fastest flight from Baltimore to Seattle takes 5h 40m
Direct flights go from Baltimore to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • 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 40m 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
Spirit AirlinesPriceFrom $126Free CancellationRating
6.3
8,012 reviews
Search Spirit Airlines flights
FrontierPriceFrom $137Free CancellationRating
5.8
3,196 reviews
Search Frontier flights
American AirlinesPriceFrom $206Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
DeltaPriceFrom $206Free CancellationRating
7.9
7,972 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $248Free CancellationRating
7.8
2,701 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $258Free CancellationRating
8.0
4,238 reviews
Search Southwest flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $277Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
Sun Country AirPriceFrom $313Free CancellationRating
6.9
330 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 $258. Generally, Southwest has 8 flights on this route every week with an average price of $495. 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 $277, round-trip. It should be noted that an average Alaska Airlines flight deal for this route in this time was higher, at $474 round-trip. Alaska Airlines operates 7 flights out of Baltimore into Seattle in an average week, so prices vary by time and availability. 10,000 Alaska Airlines reviews by users on momondo have scored the airline at 8.0/10.

Traveling to a place near Seattle?

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

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
lun. 9/8
lun. 9/15
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States