BWI - SEA

$72 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 4/22. 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
Typical prices: $510-$297
Southwest
Sat 5/9Mon 5/18
BWI - SEA • 2 stops
Cheapest non-stop
$221
Typical prices: $584-$337
Alaska Airlines
Sat 4/25Wed 4/29
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
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 5h 50m
Direct flights
Direct flights
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Direct flights
Direct flights
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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
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+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

Sat, May 9 - Mon, May 18
Southwest Logo
7:40 am - 7:40 pm
BWI
-
SEA
15h 00m
2 stops
Southwest Logo
11:55 pm - 11:50 am
SEA
-
BWI
8h 55m
2 stops
$208Southwest
Fri, Apr 24 - Tue, Apr 28
Southwest Logo
6:30 pm - 12:55 am
BWI
-
SEA
9h 25m
1 stop
Southwest Logo
6:00 am - 3:50 pm
SEA
-
BWI
6h 50m
1 stop
$209Southwest
Fri, May 1 - Mon, May 4
Southwest Logo
6:30 pm - 12:55 am
BWI
-
SEA
9h 25m
1 stop
Southwest Logo
11:55 pm - 11:50 am
SEA
-
BWI
8h 55m
2 stops
$211Southwest
Tue, Apr 14 - Tue, Apr 28
American Airlines Logo
6:00 am - 11:28 am
BWI
-
SEA
8h 28m
1 stop
American Airlines Logo
10:25 am - 11:09 pm
SEA
-
BWI
9h 44m
1 stop
$215American Airlines
Thu, Apr 30 - Tue, May 5
American Airlines Logo
7:17 pm - 12:44 am
BWI
-
SEA
8h 27m
1 stop
American Airlines Logo
10:29 pm - 8:56 am
SEA
-
BWI
7h 27m
1 stop
$216American Airlines
Fri, May 1 - Mon, May 4
Southwest Logo
4:45 pm - 12:05 am
BWI
-
SEA
10h 20m
2 stops
Southwest Logo
11:55 pm - 11:50 am
SEA
-
BWI
8h 55m
2 stops
$217Southwest
Tue, Apr 21 - Sun, May 3
Delta Logo
6:08 am - 10:55 am
BWI
-
SEA
7h 47m
1 stop
Delta Logo
9:45 pm - 9:36 am
SEA
-
BWI
8h 51m
1 stop
$218Delta
Wed, Apr 22 - Wed, Apr 29
American Airlines Logo
5:39 am - 12:29 pm
BWI
-
SEA
9h 50m
1 stop
American Airlines Logo
11:41 am - 11:09 pm
SEA
-
BWI
8h 28m
1 stop
$219American Airlines
Sat, Apr 25 - Sun, Apr 26
Southwest Logo
1:30 pm - 10:10 pm
BWI
-
SEA
11h 40m
2 stops
Southwest Logo
11:55 pm - 11:50 am
SEA
-
BWI
8h 55m
1 stop
$221Southwest
Mon, Apr 13 - Wed, Apr 15
Delta Logo
5:33 pm - 11:53 pm
BWI
-
SEA
9h 20m
1 stop
Delta Logo
11:14 pm - 9:11 am
SEA
-
BWI
6h 57m
1 stop
$224Delta
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 May.

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$72
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

  • 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 $72 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 $458 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 $445 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 $362 or less round-trip.

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 4331 reviews
7.5Entertainment
7.0Food
8.6Crew
8.0Comfort
8.1Boarding
Airline reviews

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

10.0 ExcellentGwen, Mar 2026
DAL - BNA
Read more Southwest reviews

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I liked it better when you were truer to your roots Am paying more for less fun

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

Boarding was easy. The seats are small and fairly uncomfortable

I was supposed to be on a later flight. When I showed up at the gate, the woman working there was extremely helpful getting moved up to this earlier flight.

We had a 5 hour delay on the tarmac in Baltimore

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.

Everything was excellent. It always is with Alaska Airlines. Thank you. 😊

It was ok! Not fond of sitting in middle seat. Tried to upgrade with my Atmos card but it was a new account and they weren’t able to look up my account details.

The overhead storage was already packed full when I boarded (I fly peasant class), but the attendant played some Tetris and made a spot for my small suitcase. Thanks!

My trip to Seattle from Newark was uncomfortable and there was a maintenance issue that caused a delay which ended up with me being stuck at the Seattle airport on my birthday for almost 12 hrs. The ride itself was very bumpy due to turbulence. I u derstand as my first time flying this could have been normal but all the passengers around me said that this was not what flying is normally like. On my way home I was semi comfortable due to exhaustion and paying $200 in upgrades to have a “better” seat and experience

Provide blankets for main cabin please it’s too cold inside

Wi-Fi cut out for a bit, then resumed. Otherwise flawless flight.

The seating is very small. I have restless legs but the people did everything they could to help me. Unfortunately I asked for a wheelchair between Charleston and Seattle but they didn’t have one for me! The rest of my trip was good.

Helpful, courteous, communitble staff...smooth sailing Loading, unloading.. Thank you

Ended up sitting in front of a child who kicked the back of the seat and screamed for most of the flight.

Would not let us check in our luggage. Flight was 40 minutes late, so we really did have time to check in our luggage. Could not get on another flight even for the next day, calling the Alaska service numbers provided, it stated the average wait time to speak to anyone on the phone was 8 HOURS! Alaska would not refund our tix. Never again!!!!!

The first class flight attendant was awful to everyone. Very rude; no customer service. She should not be working in first class.

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

Smaller plane for a longer flight than my first one. Doesn’t make sense.

The cabin temperature was nice and cool. The wifi was not working.

Flight late, the waited for a long time for “personal” to arrive at gate to dock the plane in Rochester. So annoying. This flight was expected, why aren’t personel available for the jet bridge?

As previously noted, this flight was great: departure was timely, the crew was friendly and attentive, and wifi connectivity was seamless. In particular, I appreciated that the flight attendant just told me to stow the laptop right before takeoff/landing, and trusted me to do so (which I did!).

Kayak botched up the booking, i had to call delta and fix. In the process Delta failed to honor my comfort plus seat assignment that i had previously.

Entertainment is ok! Boarding and seat with zone is terrible. I paid for the seats but you didn’t give me what I paid for which is exit isles.

the crew cancel the morning service due to the weather. Then the flight got deverted to Nashville . we were on the ground for over two hours the only gave us water once... no food or any snacks.... the crew should have handled better and offered something to passengers.

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

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.

Delays with no explanation. It could have been handled better.

Ceiling fell down and had to have maintenance come and duct tape it up. No WiFi on the flight.

A first class seat should fit a fat person, and this doesn't. The trays in the armrest are less functional than an ordinary tray in the back of the seat.

The flight attendant was friendly and efficient. The temperature was kept nice and cool. The plane was nice, but filthy. There were visible spills on my tray table. The gate agent was somewhat rude with her announcements and in speaking with other customers.

I appreciate that I finally got the seat I paid extra for this time. Thank you

I would have liked vegetarian and gluten free options for evening dinner time flight. I would have like a pillow on the international overnight flight . The veg wrap and oaten desert on the international flight was good

The experience at checkin for my American Airlines flight from Sacramento to LAX was very good including the assistance I received in getting my bags checked in and boarding passes printed. Was pleasantly surprised the my bags were checked through all the way to my destination at Clark International Airport in Angeles, Philippines.

Absolutely terrible. Would never fly American again. 2 deplaned incidents and delayed by close to 24 hours. $12 meal voucher for first class passengers was an insult to the injury. Pathetic.

Terrible planning. And even worse gate agents. Absolutely rude behavior.

Half of the TSA checkpoints at PHL are closed. Also, there is no standby for first class passengers. You can only standby for coach. Very dated policy and inconsistent with peers.

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

Information on your arrival and departure airports