SEA - BWI

$161 Find Cheap Flights from Seattle to Baltimore - Compare and Save

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Everything you should know

Cheapest round-trip
$368
Typical prices: $331-$618
Frontier
Sat 11/3Thu 11/8
SEA - BWI • 2 stops
Cheapest non-stop
$386
Typical prices: $373-$653
Alaska Airlines
Thu 11/8Thu 11/15
SEA - BWI • Non-stop
Nonstop flights
You can fly direct with Alaska Airlines and Southwest. Average duration is 5h 03m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 23 weeks in advance save around 44% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $320 (round-trip)
Shortest trip • 7h 27m (one-way)
Insights
Insights
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We hope you love your trip to Baltimore!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Seattle to Baltimore (SEA-BWI)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Baltimore

Tue, Nov 3 - Sun, Nov 8
Frontier Logo
12:14 pm - 2:08 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
22h 54m2 stops Las Vegas Harry Reid Intl Orlando
Frontier Logo
9:12 pm - 3:12 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
21h 00m2 stops Atlanta Hartsfield-Jackson Denver Intl
$368Frontier
Thu, Nov 5 - Mon, Nov 9
Frontier Logo
8:09 pm - 4:44 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
17h 35m2 stops Los Angeles Atlanta Hartsfield-Jackson
Frontier Logo
10:16 am - 10:59 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
27h 43m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
$376Frontier
Sun, Nov 8 - Sun, Nov 15
Alaska Airlines Logo
9:41 pm - 5:40 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
4h 59mnonstop
Alaska Airlines Logo
7:02 am - 9:56 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
5h 54mnonstop
$386Alaska Airlines
Tue, Oct 27 - Wed, Oct 28
Alaska Airlines Logo
9:18 pm - 5:20 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
5h 02mnonstop
Alaska Airlines Logo
7:02 am - 9:46 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
5h 44mnonstop
$392Alaska Airlines
Wed, Nov 4 - Tue, Nov 10
United Airlines Logo
10:50 am - 9:42 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
7h 52m1 stop Chicago O'Hare Intl
United Airlines Logo
5:31 pm - 11:07 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 36m1 stop Chicago O'Hare Intl
$392United Airlines
Thu, Oct 22 - Wed, Oct 28
Delta Logo
5:55 pm - 5:45 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
8h 50m1 stop Salt Lake City
Delta Logo
7:00 am - 2:50 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
10h 50m1 stop Salt Lake City
$395Delta
Thu, Oct 15 - Thu, Oct 22
American Airlines Logo
1:25 pm - 11:59 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
7h 34m1 stop Charlotte Douglas
American Airlines Logo
4:04 pm - 12:10 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
11h 06m1 stop Dallas/Fort Worth
$396American Airlines
Sat, Dec 5 - Tue, Dec 8
Delta Logo
9:50 am - 9:50 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
9h 00m1 stop Detroit Metropolitan Wayne County
Delta Logo
7:15 am - 2:43 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
10h 28m1 stop Salt Lake City
$397Delta
Thu, Dec 24 - Tue, Jan 5
American Airlines Logo
5:45 am - 5:33 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
8h 48m1 stop Charlotte Douglas
American Airlines Logo
7:04 pm - 12:58 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 54m1 stop Dallas/Fort Worth
$397American Airlines
Wed, Nov 4 - Tue, Nov 10
United Airlines Logo
10:50 am - 9:42 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
7h 52m1 stop Chicago O'Hare Intl
United Airlines Logo
10:09 am - 5:57 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
10h 48m2 stops Chicago O'Hare Intl Denver Intl
$398United Airlines
Booking Insights

Price, demand and travel trends for Seattle to Baltimore flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Seattle to Baltimore?

Round-trip flights from Seattle to Baltimore typically range from $331 to $618. The lowest price found in the past 5 days was $368, on Frontier.

What's the cheapest day of the week to fly from Seattle to Baltimore?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Seattle to Baltimore. It’s 13% cheaper than the average day, while Sunday is the most expensive, with prices 25% higher.

What’s the cheapest month to fly from Seattle to Baltimore?

•February is the cheapest month to fly from Seattle to Baltimore at $362 round-trip.
•July ($624) and June ($533) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 72% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Seattle to Baltimore the cheapest?

Flights from Seattle to Baltimore are cheapest 23 weeks before departure. Booking in this window typically costs about 44% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Seattle to Baltimore

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on BWI and SEA

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Key details for Seattle to Baltimore flights

Low season

February

Cheapest flight

$161
Beat the crowds with an average 30% drop in travelers.
The most popular month to fly with an average 34% increase in travelers.
One-way flight from Seattle to Baltimore

When to book flights from Seattle to Baltimore

Are your dates flexible? Find out the best times to travel from Seattle to Baltimore based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Seattle to Baltimore flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Seattle to Baltimore?

    These are the earliest and latest flight times available from Seattle to Baltimore:

    • Earliest: departs at 9:03 am and lands at 2:06 pm
    • Latest: departs at 10:30 pm and lands at 3:33 am.

    The flight takes about 5h 03m.

  • What cabin classes can I book on flights from Seattle to Baltimore?

    Four cabin classes are available on flights from Seattle to Baltimore:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How long is a flight from Seattle to Baltimore?

    A nonstop flight from Seattle to Baltimore takes 5h 03m, covering 2,327 miles.

  • Do I need a passport to fly from Seattle to Baltimore?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Seattle to Baltimore flight?

    Round-trip flights from Seattle to Baltimore range from $331 to $618, with an average of $456 over the past 12 months. Anything below $331 counts as a good deal.

  • How expensive are last-minute Seattle to Baltimore flights?

    Last-minute fares on this route (booked within two weeks of departure) run 39% above the $456 route average. Book 23 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Seattle to Baltimore?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $320 round-trip via San Francisco (SFO), compared to $478 for nonstop.

  • What is the standard checked-bag allowance on flights from Seattle to Baltimore?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Seattle to Baltimore?

    The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest and Alaska Airlines. Other aircraft seen on the route include Boeing 737 variants.

  • How are flight departures from Seattle to Baltimore spread across the day?

    Morning is the busiest departure period on Seattle to Baltimore flights, with 50% of flights leaving in that window. Night departures account for 50%, afternoon flights for 0%, and evening flights for 0%.

  • Have flight prices from Seattle to Baltimore changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $368 to $2,621. That means the highest observed fare was about 7x higher than the lowest one.

  • Which airlines offer Wi-Fi on Seattle to Baltimore flights?

    Alaska Airlines is the only airline on the Seattle to Baltimore route offering in-flight Wi-Fi. Pricing depends on fare class.

  • How are flight prices from Seattle to Baltimore looking right now?

    One-way fares from Seattle to Baltimore are currently lower than usual. Average one-way flight prices are about $191, which is 37% below the typical average for this route.

  • What car rental options are available at Baltimore/Washington Airport (BWI)?

    Baltimore/Washington Airport (BWI) hosts 5 major car rental companies, with daily rates starting from around $25 for economy cars. Top options include:

    • NextCar
    • Hertz
    • Dollar
    • Thrifty
    • Budget

  • Which airports can I use when flying from Seattle to Baltimore?

    Flights from Seattle to Baltimore usually depart from Seattle/Tacoma Intl (SEA) and arrive at Baltimore/Washington (BWI).

  • Which airports do connecting flights from Seattle to Baltimore pass through?

    One-stop flights from Seattle to Baltimore most commonly connect through:

    • Detroit Metropolitan Wayne County (DTW) - 24% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 21% of one-stop connections
    • Charlotte Douglas (CLT) - 20% of one-stop connections
    • Denver Intl (DEN) - 11% of one-stop connections

  • Can I save money by using flexible dates for flights from Seattle to Baltimore?

    Yes. Flexible dates can save you up to 31% on flights from Seattle to Baltimore. Wednesday is the cheapest departure day at $398 round-trip on average, while Sunday is the most expensive at $571, a difference of $173.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Seattle to Baltimore?

    2 airlines operate flights between Seattle and Baltimore. The airlines offering nonstop flights on this route include:

    • Alaska Airlines
    • Southwest

  • How much time can I save by choosing a different layover airport from Seattle to Baltimore?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 7h 27m, compared with 7h 56m via Chicago O'Hare Intl (ORD) and 8h 09m via Chicago Midway (MDW).

  • What is the time difference between Seattle and Baltimore?

    Baltimore is 3 hours ahead of Seattle (Eastern Time vs Pacific Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Baltimore?

    Some of the most popular sights in Baltimore are M&T Bank Stadium, National Aquarium Baltimore and Oriole Park At Camden Yards. These are among the most viewed places in Baltimore on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Seattle to Baltimore flights?

    Among airlines operating Seattle to Baltimore flights:

    • Alaska Airlines: offers extra legroom; offers free seat selection
    • Southwest: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Seattle to Baltimore flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Alaska Airlines: a cabin bag and a checked bag in Economy Class
    • Southwest: a cabin bag and a checked bag in Economy Class
    • Hawaiian Airlines: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

  • How far is downtown Baltimore from BWI?

    Downtown Baltimore is roughly 10 miles from Baltimore/Washington International Thurgood Marshall Airport (BWI). Transportation options from the airport include Light RailLink, taxis and rental cars. MTA Light Rail service runs from the airport to downtown Baltimore and Hunt Valley. Taxis are available for rides from BWI, while rental cars are available for self-drive travel.

  • Where are the pet relief areas at BWI?

    At Baltimore/Washington International Thurgood Marshall Airport (BWI), non-service animals in the terminal must be restrained in a container at all times. Pet relief areas are located both before and after security. For arriving passengers, they are near the hourly garage parking and at the Concourse D and E connector.

Your guide to booking Seattle to Baltimore flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $398, about $173 less than Sunday fares (30% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 23 weeks before you fly. On this route, that window historically saves about 44% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Seattle to Baltimore trip for February. Fares historically average $362 round-trip in that month - typically $262 less than the most expensive month, which is July (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through San Francisco Airport (SFO) can be cheaper than flying direct. The cheapest layover option averages $320 round-trip on this route - about $158 less than direct flights (based on the last 12 months).
  • If you need wheelchair service at Baltimore/Washington International Thurgood Marshall Airport (BWI), let your airline know in advance so the necessary arrangements can be made.
  • If you plan on leaving your car at Seattle-Tacoma International Airport (SEA), check out the off-site parking options.

Prefer to fly direct from Seattle to Baltimore?

 
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Baltimore/Washington Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Baltimore/Washington

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Baltimore/Washington to Seattle/Tacoma Intl

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

More options for your flight from Seattle to Baltimore

Complete your trip to Baltimore with a hotel stay or car rental