What is the cheapest airline that flies from Seattle/Tacoma Intl to Baltimore/Washington?

Southwest, Frontier, and Sun Country Air are the most popular carriers operating from Seattle/Tacoma Intl to Baltimore/Washington

Which airport is the most popular layover for flights between Seattle and Baltimore?

Detroit (DTW) was the most common stop: 29% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Seattle to Baltimore?

Minneapolis (MSP) has the shortest average layover time for this route: 0h 40m.

Which layover airport has the shortest travel time from Seattle to Baltimore?

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 6h 58m.

How many flights depart from Seattle to Baltimore on average per week?

As of September 2025, 52 flights take off from Seattle and land in Baltimore each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.

What airlines fly to Baltimore?

Alaska Airlines, Delta and United Airlines are the top three most popular airlines that fly to Baltimore from Seattle according to our data. Alaska Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Baltimore. Keep in mind that there are 8 different airlines that fly to Baltimore on a routine basis, so you have a few additional options to choose from.

How many flights depart from Seattle to Baltimore on average per day?

7 flights are operational daily from Seattle to Baltimore as of September 2025. The most popular departure time for this route is 9:00PM, with 55% of flights per day taking off in the evening.

Which layover airport offers the lowest fares from Seattle to Baltimore?

Flights via Detroit (DTW) offer the lowest average round-trip price of $206.

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

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

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

As of September 2025, there are 8 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport.

What documentation or ID do you need to fly to Baltimore/Washington Airport?

The necessary travel and health documents for your Baltimore/Washington Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$138 Cheap Flights from Seattle to Baltimore in 2025/26

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Find the cheapest flights from Seattle to Washington, D.C.

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:02 pm - 5:44 pmSEA-BWI

25h 42m1 stop

9:42 pm - 8:48 amBWI-SEA

14h 06m1 stop

$200Frontier

Find Deal

Thu, Oct 23 - Sun, Oct 26

9:08 am - 7:19 pmSEA-BWI

31h 11m1 stop

6:00 am - 6:20 pmBWI-SEA

15h 20m1 stop

$211Multiple Airlines

Find Deal

Mon, Nov 17 - Fri, Dec 5

1:35 pm - 11:49 pmSEA-BWI

7h 14m1 stop

5:34 pm - 10:14 pmBWI-SEA

7h 40m1 stop

$227Delta

Find Deal

Wed, Nov 5 - Tue, Nov 11

3:05 pm - 5:45 amSEA-BWI

11h 40m2 stops

6:35 pm - 12:30 amBWI-SEA

8h 55m1 stop

$232Southwest

Find Deal

Tue, Nov 4 - Mon, Nov 10

5:40 am - 5:00 pmSEA-BWI

8h 20m2 stops

3:10 pm - 10:55 pmBWI-SEA

10h 45m2 stops

$237Southwest

Find Deal

Wed, Nov 12 - Wed, Nov 19

12:41 am - 2:30 pmSEA-BWI

10h 49m1 stop

7:07 pm - 12:58 amBWI-SEA

8h 51m1 stop

$252American Airlines

Find Deal

Tue, Nov 18 - Sun, Nov 23

9:54 am - 6:00 pmSEA-BWI

5h 06mnonstop

6:55 pm - 9:53 pmBWI-SEA

5h 58mnonstop

$257Alaska Airlines

Find Deal

Tue, Jan 6 - Wed, Jan 21

7:15 am - 12:13 amSEA-BWI

13h 58m2 stops

7:15 am - 2:59 pmBWI-SEA

10h 44m1 stop

$260Delta

Find Deal

Sat, Dec 6 - Thu, Dec 11

9:54 am - 6:00 pmSEA-BWI

5h 06mnonstop

6:55 pm - 9:53 pmBWI-SEA

5h 58mnonstop

$264Alaska Airlines

Find Deal

Tue, Jan 6 - Tue, Jan 20

1:53 pm - 12:30 amSEA-BWI

7h 37m1 stop

6:00 am - 11:40 amBWI-SEA

8h 40m1 stop

$272American Airlines

Find Deal

Thu, Nov 6 - Tue, Nov 11

Frontier flights from Seattle to Baltimore

Our best Frontier deals on Seattle to Baltimore flight tickets

Frontier

Oct 23

SEA1:02 pmSeattle/Tacoma Intl

25h 42m

1 stop

BWI5:44 pmBaltimore/Washington

Oct 26

BWI9:42 pmBaltimore/Washington

14h 06m

1 stop

SEA8:48 amSeattle/Tacoma Intl

$200

Find similar

Frontier

Oct 1

SEA7:00 amSeattle/Tacoma Intl

35h 14m

2 stops

BWI9:14 pmBaltimore/Washington

Oct 6

BWI6:27 pmBaltimore/Washington

20h 40m

1 stop

SEA12:07 pmSeattle/Tacoma Intl

$214

Find similar

Frontier

Oct 23

SEA1:02 pmSeattle/Tacoma Intl

41h 03m

2 stops

BWI9:05 amBaltimore/Washington

Oct 27

BWI6:29 pmBaltimore/Washington

20h 44m

1 stop

SEA12:13 pmSeattle/Tacoma Intl

$215

Find similar

Delta flights from Seattle to Baltimore

Our best Delta deals on Seattle to Baltimore flight tickets

Delta

Nov 5

SEA1:35 pmSeattle/Tacoma Intl

7h 14m

1 stop

BWI11:49 pmBaltimore/Washington

Nov 11

BWI5:34 pmBaltimore/Washington

7h 40m

1 stop

SEA10:14 pmSeattle/Tacoma Intl

$227

Find similar

Delta

Dec 6

SEA7:15 amSeattle/Tacoma Intl

13h 58m

2 stops

BWI12:13 amBaltimore/Washington

Dec 11

BWI7:15 amBaltimore/Washington

10h 44m

1 stop

SEA2:59 pmSeattle/Tacoma Intl

$260

Find similar

Delta

Oct 23

SEA5:00 pmSeattle/Tacoma Intl

10h 00m

1 stop

BWI6:00 amBaltimore/Washington

Nov 5

BWI6:22 pmBaltimore/Washington

8h 32m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

$263

Find similar

Fly from

Fly to

Route

Depart

Return

Price

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 10/23

1:02 pm-5:44 pm

1 stop25h 42m

Baltimore/Washington

Sun 10/26

9:42 pm-8:48 am

1 stop14h 06m

$200

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Mon 11/17

9:08 am-7:19 pm

1 stop31h 11m

Baltimore/Washington

Fri 12/5

6:00 am-6:20 pm

1 stop15h 20m

$211

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 11/5

1:35 pm-11:49 pm

1 stop7h 14m

Baltimore/Washington

Tue 11/11

5:34 pm-10:14 pm

1 stop7h 40m

$227

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 11/4

3:05 pm-5:45 am

2 stops11h 40m

Baltimore/Washington

Mon 11/10

6:35 pm-12:30 am

1 stop8h 55m

$232

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Wed 11/12

5:40 am-5:00 pm

2 stops8h 20m

Baltimore/Washington

Wed 11/19

3:10 pm-10:55 pm

2 stops10h 45m

$237

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 11/18

12:41 am-2:30 pm

1 stop10h 49m

Baltimore/Washington

Sun 11/23

7:07 pm-12:58 am

1 stop8h 51m

$252

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 1/6

9:54 am-6:00 pm

Nonstop5h 06m

Baltimore/Washington

Wed 1/21

6:55 pm-9:53 pm

Nonstop5h 58m

$257

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Sat 12/6

7:15 am-12:13 am

2 stops13h 58m

Baltimore/Washington

Thu 12/11

7:15 am-2:59 pm

1 stop10h 44m

$260

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Tue 1/6

9:54 am-6:00 pm

Nonstop5h 06m

Baltimore/Washington

Tue 1/20

6:55 pm-9:53 pm

Nonstop5h 58m

$264

SeattleBaltimore

SEA - BWI

SEABWI

Seattle/Tacoma Intl

Thu 11/6

1:53 pm-12:30 am

1 stop7h 37m

Baltimore/Washington

Tue 11/11

6:00 am-11:40 am

1 stop8h 40m

$272

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How to get the cheapest flight ticket from Seattle to Baltimore

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

Prices

Airlines

Layovers

Other information

What is the cheapest month to fly to Baltimore?

If you’re not able to fly to Baltimore in September, then January is your next best option. Flight prices from Seattle to Baltimore during January average around $369.

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

The cheapest day to depart from Seattle to Baltimore is on a Wednesday. Travelers who choose to depart for Baltimore on a Wednesday will often find tickets for as low as $402. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $563. These prices are subject to change though, so be sure to set up a Price Alert for flights to Baltimore.

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

Flying to Baltimore from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $355 when looking at flights departing in the afternoon. Flights in the morning are often more expensive with an average ticket price of $477.

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

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

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

You are more likely to see cheaper flights to Baltimore from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Baltimore for around $418 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Baltimore from Seattle for as low as $323 on momondo.

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

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

How have Seattle to Baltimore flight prices changed over time?

As of September 2025, prices for Seattle to Baltimore flights are approximately 9% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Baltimore

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

Estimated round-trip price

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

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

Best Price Found	$229
Fastest flight time	4h 58m
Direct flights	Every day
Airports in Baltimore	1 airport

The best one-way flight to Baltimore from Seattle in the past 72 hours is $229. The best round-trip flight deal from Seattle to Baltimore found on momondo in the last 72 hours is $305.

The fastest flight from Seattle to Baltimore takes 4h 58m

Direct flights go from Seattle to Baltimore every day.

There is 1 airport near Baltimore: Baltimore/Washington (BWI)

Search flight deals

How far is Seattle/Tacoma Intl to Baltimore/Washington by plane?
A flight from Seattle/Tacoma Intl to Baltimore/Washington will travel around 2326.9 mi. By plane, this route typically takes 5h 05m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport?
As of September 2025, there are 8 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport.
What documentation or ID do you need to fly to Baltimore/Washington Airport?
The necessary travel and health documents for your Baltimore/Washington Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Baltimore?
Based on momondo bookings for flights between Seattle and Baltimore, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 26.87% of the total bookings. Other popular models include Boeing 737 MAX 9 with 24.93%, Boeing 737 with 15.92%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 9.22%.
What is the most popular airline from Seattle to Baltimore?
momondo data reveals that the most frequently booked airline on the route from Seattle to Baltimore is Alaska Airlines, representing 55% of all bookings. The subsequent popular airlines are Delta at 16%, Hawaiian Airlines at 8%, and Southwest at 6%.

Best airlines flying from Seattle to Baltimore

Compare and see reviews for airlines that fly from Seattle to Baltimore with momondo

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $130	Free Cancellation	Rating 6.3 8,019 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $139	Free Cancellation	Rating 5.8 3,174 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $153	Free Cancellation	Rating 7.8 2,724 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $206	Free Cancellation	Rating 7.9 7,957 reviews	Search Delta flights
American Airlines	PriceFrom $206	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $262	Free Cancellation	Rating 7.4 8,924 reviews	Search United Airlines flights
Southwest	PriceFrom $266	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $277	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Southwest Flights From Seattle to Baltimore
Southwest flight deals from Seattle to Baltimore start from $266 round-trip. Over the 7 Southwest flights for this route in a normal week, average airfare is usually $432 round-trip - but some users have found much cheaper deals with momondo.
Alaska Airlines Flights From Seattle to Baltimore
$277 is the best Alaska Airlines flight deal from Seattle to Baltimore found on momondo over the last 72 hours. The average Alaska Airlines ticket price found was closer to $465, however, with flight time and availability significantly affecting the price. Alaska Airlines (8.0/10 from 10,000 user reviews) flies into Baltimore from Seattle 15 times in an average week so prices can vary.

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Baltimore for you.

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

Flights from Seattle to Baltimore with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Baltimore from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Seattle to Baltimore flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Baltimore 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.

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Cheap flights from Seattle to Washington, D.C. from $138

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Washington, D.C. departing on 11/13. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Seattle to Baltimore

Our best Frontier deals on Seattle to Baltimore flight tickets

Delta flights from Seattle to Baltimore

Our best Delta deals on Seattle to Baltimore flight tickets

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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Seattle to Baltimore

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 Baltimore?

If you’re not able to fly to Baltimore in September, then January is your next best option. Flight prices from Seattle to Baltimore during January average around $369.

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

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

Flying to Baltimore from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $355 when looking at flights departing in the afternoon. Flights in the morning are often more expensive with an average ticket price of $477.

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

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

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

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

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

How have Seattle to Baltimore flight prices changed over time?

As of September 2025, prices for Seattle to Baltimore flights are approximately 9% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Baltimore/Washington?

Southwest, Frontier, and Sun Country Air are the most popular carriers operating from Seattle/Tacoma Intl to Baltimore/Washington

What airlines fly to Baltimore?

Which airport is the most popular layover for flights between Seattle and Baltimore?

Detroit (DTW) was the most common stop: 29% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Seattle to Baltimore?

Flights via Detroit (DTW) offer the lowest average round-trip price of $206.

Which layover airport has the shortest travel time from Seattle to Baltimore?

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 6h 58m.

Which layover airport has the shortest connection time from Seattle to Baltimore?

Minneapolis (MSP) has the shortest average layover time for this route: 0h 40m.

How many flights depart from Seattle to Baltimore on average per day?

7 flights are operational daily from Seattle to Baltimore as of September 2025. The most popular departure time for this route is 9:00PM, with 55% of flights per day taking off in the evening.

How many flights depart from Seattle to Baltimore on average per week?

As of September 2025, 52 flights take off from Seattle and land in Baltimore each week. The most common flight departure day for this route is Mon, with 19% of weekly flights taking off on this day.

When to book flights from Seattle to Baltimore

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

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

Best Price Found

Fastest flight time

Direct flights

Airports in Baltimore

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

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

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

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

What documentation or ID do you need to fly to Baltimore/Washington Airport?

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

What is the most popular airline from Seattle to Baltimore?

Best airlines flying from Seattle to Baltimore

Compare and see reviews for airlines that fly from Seattle to Baltimore with momondo

Southwest Flights From Seattle to Baltimore

Alaska Airlines Flights From Seattle to Baltimore

Why use momondo?

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

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

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

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

An easier way to manage your Baltimore 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Maryland