BWI - SEA

$104 Find Cheap Flights from Baltimore to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Baltimore to Seattle departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$315
Typical prices: $297-$474
Southwest
Wed 10/21Mon 10/26
BWI - SEA • 2 stops
Cheapest non-stop
$322
Typical prices: $340-$485
Alaska Airlines
Wed 9/16Fri 9/25
BWI - SEA • Non-stop
Nonstop flights
You can fly direct with Alaska Airlines and Southwest. Average duration is 5h 40m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $186 (round-trip)
Shortest trip • 7h 35m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
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Flight Deals

Cheap Flights from Baltimore to Seattle (BWI-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Baltimore to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Baltimore to Seattle

Wed, Oct 21 - Mon, Oct 26
Southwest Logo
8:20 am - 7:50 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
14h 30m2 stops Boston Logan Intl San Diego
Southwest Logo
7:40 am - 12:50 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
14h 10m2 stops San Diego Phoenix Sky Harbor Intl
$315Southwest
Sat, Sep 12 - Fri, Sep 25
Southwest Logo
10:05 am - 6:25 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
11h 20m2 stops Portland Oakland
Southwest Logo
10:30 pm - 6:30 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
5h 00mnonstop
$316Southwest
Fri, Nov 6 - Mon, Nov 9
United Airlines Logo
4:19 pm - 9:19 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 00m1 stop Denver Intl
United Airlines Logo
4:39 pm - 5:34 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
9h 55m1 stop Los Angeles
$321United Airlines
Thu, Oct 8 - Tue, Oct 13
American Airlines Logo
11:55 am - 7:44 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
10h 49m1 stop Dallas/Fort Worth
American Airlines Logo
7:30 am - 7:26 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
8h 56m1 stop Dallas/Fort Worth
$321American Airlines
Fri, Oct 16 - Mon, Oct 19
American Airlines Logo
5:48 pm - 11:10 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 22m1 stop Charlotte Douglas
American Airlines Logo
11:59 pm - 11:01 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
8h 02m1 stop Chicago O'Hare Intl
$321American Airlines
Wed, Sep 16 - Fri, Sep 25
Alaska Airlines Logo
7:15 pm - 9:57 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
5h 42mnonstop
Alaska Airlines Logo
10:23 pm - 6:30 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
5h 07mnonstop
$322Alaska Airlines
Fri, Sep 25 - Tue, Sep 29
Alaska Airlines Logo
7:50 am - 10:29 amBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
5h 39mnonstop
Alaska Airlines Logo
9:57 am - 6:08 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
5h 11mnonstop
$322Alaska Airlines
Wed, Sep 2 - Sat, Sep 12
United Airlines Logo
5:40 pm - 10:43 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
6:32 am - 8:55 pmSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
11h 23m1 stop Los Angeles
$326United Airlines
Mon, Oct 12 - Sat, Oct 17
Delta Logo
12:37 pm - 6:35 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
8h 58m1 stop Detroit Metropolitan Wayne County
Delta Logo
10:35 pm - 9:16 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
7h 41m1 stop Atlanta Hartsfield-Jackson
$337Delta
Fri, Sep 25 - Mon, Sep 28
Delta Logo
5:40 pm - 10:05 pmBWI  Baltimore/Washington-SEA Seattle/Tacoma Intl
7h 25m1 stop Detroit Metropolitan Wayne County
Delta Logo
5:50 pm - 6:18 amSEA  Seattle/Tacoma Intl-BWI Baltimore/Washington
9h 28m1 stop Salt Lake City
$341Delta
Booking Insights

KAYAK's insights & trends for Baltimore to Seattle flights

Get data-powered insights and trends into flights from Baltimore to Seattle to help you find the cheapest flights, the best time to fly and much more.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Baltimore to Seattle departing in October.

Flight prices are below average for this route right now.

Flights to Seattle from Baltimore usually cost between $375 and $562 in October.
The lowest price found in the past 5 days was $315 on Southwest (Oct 21-Oct 26).

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

The average price of all round-trip flights from Baltimore to Seattle clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Baltimore to Seattle, look for departures on Tuesdays and avoid leaving on a Sunday, as it's usually the priciest day. When flying back from Seattle, Wednesday is the cheapest day to fly and Sunday is the most expensive.

What is the cheapest month to fly from Baltimore to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Baltimore to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Baltimore to Seattle is February, where tickets cost $298 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $534 and $526 respectively.

Can I save money by flying with a layover from Baltimore to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $487 on average.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Baltimore to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Baltimore to Seattle, you should book around 3 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 18 weeks before departure.

Expert advice

Expert advice for your flight from Baltimore to Seattle

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
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.

Good to know

Low season

January

Cheapest flight

$104
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from Baltimore to Seattle

When to book flights from Baltimore to Seattle

Are your dates flexible? Find out the best times to travel from Baltimore to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Baltimore to Seattle

  • Does BWI provide animal relief stations?

    Yes. If you are traveling with a service animal or a pet who needs to go to the bathroom or get a drink of water, you can take advantage of one of the animal relief areas at BWI, 2 Airside and 2 Landside. The post-security stations are located next to the Terminal B/C connector and just beyond the security checkpoint for Concourses D/E. Both of the pre-security areas are located outside the airport. The first one is in front of the Hourly Garage and the second one is next to the Light Rail Station.

  • Does SEA have a USO?

    Yes. If you are an active-duty US military service member or dependent, and you wish to refresh, regroup, or reboot before heading out into Seattle, you can take advantage of the USO on the Mezzanine level above Checkpoint #3. This lounge is open on Thursdays from 8:00 am until 12:00 am the next day and on Mondays, Wednesdays, and Saturdays from 8:00 am until 4:00 am the next day. The USO is closed on Tuesdays, Fridays, and Sundays. Some amenities include showers, places to sleep, travel information, a nursery, a big screen TV, internet access, and more.

  • Does BWI provide facilities for traveling mothers?

    Yes. BWI has installed Mamava lactation suites in every terminal in the airport. These freestanding 4X8 lactation suites are made of fiberglass and Corian and provide cleanliness and privacy for mothers who want to breastfeed in private or who need to pump. Each Mamava pod includes two benches, a shelf, a coat hook, a mirror, motion-activated lighting, an exhaust fan, an electrical outlet, and a USB port.

  • Does BWI provide accommodations for the differently abled?

    Yes. BWI provides wheelchairs, wheelchair assistance, ramps, elevators, lift-equipped buses, accessible restrooms, unisex restrooms, and restrooms that include adult changing stations for an adult and his or her caregiver. BWI also has TDD telephones Video Relay Systems for the hearing impaired.

  • What is the cheapest flight from Baltimore to Seattle?

    In the last 5 days, the lowest price for a flight from Baltimore to Seattle was $104 for a one-way ticket and $315 for a round-trip.

  • Do I need a passport to fly between Baltimore and Seattle?

    No, a passport isn't needed to fly from Baltimore to Seattle. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Baltimore to Seattle?

    Baltimore and Seattle are both served by 1 main airport. You will leave Baltimore from Baltimore/Washington and will be arriving at Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from Baltimore to Seattle?

    Alaska Airlines, JetBlue, Delta, and American Airlines offer inflight Wi-Fi service on the Baltimore to Seattle flight route.

  • Which aircraft models fly most regularly from Baltimore to Seattle?

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Baltimore to Seattle flight route.

  • Which airline alliances offer flights from Baltimore to Seattle?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Baltimore and Seattle, with Star Alliance being the most commonly used for this route.

  • On which days can I fly direct from Baltimore to Seattle?

    There are nonstop flights from Baltimore to Seattle on a daily basis.

  • Which is the best airline for flights from Baltimore to Seattle, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Baltimore to Seattle are Southwest and Alaska Airlines. With an average price for the route of $459 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $462 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Baltimore to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Baltimore to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Baltimore to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Baltimore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Baltimore to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Baltimore with another airline. Booking your flights between Baltimore and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Baltimore to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Baltimore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Baltimore to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $268 or less one-way and $400 or less round-trip.
  • The Baltimore Washington Thurgood Marshall Airport (BWI) serves as the primary hub for Southwest Airlines. The Seattle-Tacoma International Airport (SEA) is a hub for Delta Airlines and Alaska Airlines.
  • BWI serves the metropolitan areas of both Baltimore, Maryland, and Washington DC. These cities are about 40 miles apart. BWI is about 20 to 30min away from the city of Baltimore. On the other hand, BWI is about 1h 20min away from Washington DC.
  • To get from SEA into downtown Seattle, find your way to the SEA Parking Garage and go to the 4th floor, where the Light Rail Train Station is located. Take Light Rail #1, and this train can take you to many places throughout the Seattle metropolitan area.
  • If your muscles are feeling sore when you land at SEA and you want to ease the kinks out, you can enjoy the massage and relaxation services offered by the Spa Terminal Getaway in SEA. This spa is located on Concourse A at Gate A5.
  • If you are waiting for a ride at SEA and have children with you, you might want to stop by the popular Kids’ Play Area at SEA, located between Concourses A and B. As the kids have fun with the oversized toys with airplane and airport themes, parents can relax and reboot on the nearby seating provided.

Prefer to fly direct from Baltimore to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Baltimore/Washington to Seattle/Tacoma Intl.
Find which airlines fly direct from Baltimore/Washington Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Baltimore/Washington to Seattle/Tacoma Intl

Monday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Tuesday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Wednesday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Thursday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Friday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Saturday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Sunday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

See more direct flights

Direct returns

Seattle/Tacoma Intl to Baltimore/Washington

Monday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Tuesday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Wednesday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Thursday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Friday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Saturday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

Sunday

Alaska Airlines,Southwest

Alaska Airlines,Southwest

See more direct flights

Everything you need to know for your flight from Baltimore to Seattle

Information on your arrival and departure airports