BWI - SEA

$84 Find Cheap Flights from Baltimore to Seattle

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 4/28. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to Seattle.
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Everything you should know

Cheapest round-trip
$208
Overall average: $425
Delta
Tue 4/21Wed 4/22
BWI - SEA • 1 stop
Cheapest non-stop
$255
Typical prices: $322-$560
Alaska Airlines
Wed 4/29Sun 5/3
BWI - SEA • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
BWI's street pricing policy keeps dining costs local.
Use Link light rail for a quick trip to downtown Seattle.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $208 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 5h 54m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $299 (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 4 weeks in advance save around 42% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
Good to know
+1
+1
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Flight Deals
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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

Tue, Apr 21 - Wed, Apr 22
Delta Logo
10:11 am - 2:17 pm
BWI
-
SEA
7h 06m
1 stop
Delta Logo
7:35 pm - 6:00 am
SEA
-
BWI
7h 25m
1 stop
$208Delta
Mon, Jun 1 - Thu, Jun 4
Southwest Logo
3:55 pm - 12:40 am
BWI
-
SEA
11h 45m
1 stop
Southwest Logo
9:25 pm - 5:20 am
SEA
-
BWI
4h 55mnonstop
$209Southwest
Tue, Apr 28 - Sat, May 2
Southwest Logo
12:40 pm - 6:30 pm
BWI
-
SEA
8h 50m
1 stop
Southwest Logo
6:55 pm - 5:45 am
SEA
-
BWI
7h 50m
1 stop
$214Southwest
Sat, Apr 25 - Sat, May 2
American Airlines Logo
7:52 pm - 12:36 am
BWI
-
SEA
7h 44m
1 stop
American Airlines Logo
1:19 pm - 11:56 pm
SEA
-
BWI
7h 37m
1 stop
$218American Airlines
Wed, Apr 15 - Tue, Apr 28
Delta Logo
7:15 am - 12:25 pm
BWI
-
SEA
8h 10m
1 stop
Delta Logo
7:35 pm - 6:00 am
SEA
-
BWI
7h 25m
1 stop
$219Delta
Tue, Apr 28 - Sat, May 2
Southwest Logo
12:40 pm - 6:30 pm
BWI
-
SEA
8h 50m
1 stop
Southwest Logo
9:00 am - 8:40 pm
SEA
-
BWI
8h 40m
2 stops
$220Southwest
Wed, Apr 15 - Tue, Apr 21
American Airlines Logo
5:39 am - 12:29 pm
BWI
-
SEA
9h 50m
1 stop
American Airlines Logo
10:25 am - 11:09 pm
SEA
-
BWI
9h 44m
1 stop
$222American Airlines
Sat, Apr 25 - Sat, May 2
Southwest Logo
3:05 pm - 10:10 pm
BWI
-
SEA
10h 05m
2 stops
Southwest Logo
6:55 pm - 5:45 am
SEA
-
BWI
7h 50m
1 stop
$224Southwest
Wed, Apr 15 - Tue, May 5
Southwest Logo
8:45 am - 6:00 pm
BWI
-
SEA
12h 15m
1 stop
Southwest Logo
11:45 pm - 11:50 am
SEA
-
BWI
9h 05m
2 stops
$228Southwest
Tue, Apr 7 - Tue, Apr 14
Southwest Logo
2:50 pm - 10:30 pm
BWI
-
SEA
10h 40m
2 stops
Southwest Logo
6:30 am - 6:20 pm
SEA
-
BWI
8h 50m
2 stops
$229Southwest
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.

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 July and March, where the average cost of round-trip tickets is $472 and $457 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.

No, with an average price for the route of $378, prices are generally cheapest when you fly direct.

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 4 weeks before departure, which saves you about 42% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 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 seasonJanuary
Cheapest flight$84
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 1% 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 3 days, the lowest price for a flight from Baltimore to Seattle was $84 for a one-way ticket and $208 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, American Airlines, Delta, and JetBlue 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 $454 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 $446 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 $168 or less one-way and $337 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

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

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

Reviews of the top 5 airlines serving from Baltimore to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Baltimore to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Baltimore to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4318 reviews
8.0Comfort
7.0Food
8.6Crew
8.1Boarding
7.5Entertainment
Airline reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

4.0 OkayKenny, Mar 2026
TPA - BWI
Read more Southwest reviews

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Flight boarded late after announcing on time boarding. Flight arrived only a little late despite late departure. Had trouble connecting to WiFi

Snacks for our toddler could have been better, front the standpoint of variety but that’s not any different from other airlines.

Never got on because first part of trip was cancelled and we have no idea when we will get rebooked…

They cancelled the flight and provided no support to find another way home or how to get a refund. Links provided didn’t work and phone wait times were over eight hours. Battery on my phone couldn’t last long enough.

signage from the upper area to the tram down 2 escalator!

The WiFi worked for entertainment but a nearly 4 hour flight should have personal tvs

Generally very good. Waiting (due to de-icing and traffic) in plane to take off was a put-off. But it's not the airline's fault. I find Airbus more comfortable than Boeing.

Lot's of good food and free entanglement made the trip pleasurable and fun.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

Easy check-in. Good customer service. Had to check carry-on due to lack of overhead space. Wish the airplane was configured with more overhead area so this doesn't usually happen.

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The crew were exceptionally nice and accommodating. My wife was tired after the flight from Haneda, Tokyo. They let her sleep and served her dinner later after she woke up, before we landed in PDX.

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Horrible food and crew. Crew were laughing and talking loud while people were trying to sleep

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

The crew at Hawaiian Airlines was fantastic. Kind and hard working. The pilots were great with giving us all the updates to make sure we were informed.

Very good. Nice plane and we sat in economy plus - bigger seats, more room. They served a meal and snacks, and the meal was an apple stuffed pancake that was very good! The snack for us was a hummus sandwich - also very good. The flight attendants were helpful and nice. They have plenty of movies and shows to watch. My only negative -- they changed our flights around and did not adjust the layovers, so we ended up with a very long and unnecessary layover in Honolulu.

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

Flight scheduled to take off at 5.55pm but it did not take off until 7pm due to some food delivery delay.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Check in was rough because the check in crew did not know how to manage my international visa documents. Required a long process and 4 people to finally be able to proceed to security. They told us incorrect information several times before acknowledging we did indeed have everything we needed from the start.

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

Information on your arrival and departure airports