SEA - BWI

$135 Find Cheap Flights from Seattle to Baltimore

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Baltimore departing on 11/10. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Baltimore.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Baltimore.
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Flight Deals

Cheap Flights from Seattle to Baltimore (SEA-BWI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Baltimore 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 Seattle to Baltimore

Wed, Nov 5 - Mon, Nov 10
Delta Logo
5:00 pm - 6:00 amSEA-BWI
10h 00m1 stop
Delta Logo
6:58 pm - 11:59 pmBWI-SEA
8h 01m1 stop
$197Delta
Find Deal
Thu, Oct 30 - Sat, Nov 1
Southwest Logo
5:15 am - 5:00 pmSEA-BWI
8h 45m1 stop
Southwest Logo
4:45 pm - 9:45 pmBWI-SEA
8h 00m1 stop
$198Southwest
Find Deal
Thu, Oct 16 - Mon, Oct 20
Frontier Logo
1:02 pm - 5:32 pmSEA-BWI
25h 30m1 stop
Frontier Logo
6:29 pm - 12:07 pmBWI-SEA
20h 38m1 stop
$199Frontier
Find Deal
Tue, Nov 4 - Mon, Nov 10
American Airlines Logo
12:41 am - 1:51 pmSEA-BWI
10h 10m2 stops
American Airlines Logo
5:10 pm - 11:18 pmBWI-SEA
9h 08m1 stop
$202American Airlines
Find Deal
Mon, Nov 3 - Wed, Nov 5
Southwest Logo
6:15 am - 7:45 pmSEA-BWI
10h 30m1 stop
Southwest Logo
7:00 am - 8:40 pmBWI-SEA
16h 40m2 stops
$203Southwest
Find Deal
Fri, Oct 3 - Mon, Oct 6
Frontier Logo
6:12 am - 5:42 pmSEA-BWI
8h 30m1 stop
Frontier Logo
9:59 pm - 12:07 pmBWI-SEA
17h 08m2 stops
$204Frontier
Find Deal
Wed, Nov 5 - Sat, Nov 8
American Airlines Logo
11:34 am - 11:02 pmSEA-BWI
8h 28m1 stop
American Airlines Logo
5:04 am - 1:10 pmBWI-SEA
11h 06m2 stops
$217American Airlines
Find Deal
Wed, Oct 1 - Fri, Oct 3
Hawaiian Airlines Logo
9:29 pm - 5:39 amSEA-BWI
5h 10mnonstop
Hawaiian Airlines Logo
7:37 pm - 10:27 pmBWI-SEA
5h 50mnonstop
$243Hawaiian Airlines
Find Deal
Wed, Dec 3 - Tue, Dec 9
Alaska Airlines Logo
9:38 pm - 5:40 amSEA-BWI
5h 02mnonstop
Alaska Airlines Logo
7:00 am - 10:02 amBWI-SEA
6h 02mnonstop
$257Alaska Airlines
Find Deal
Sat, Oct 25 - Sat, Nov 1
Alaska Airlines Logo
9:03 am - 5:12 pmSEA-BWI
5h 09mnonstop
Alaska Airlines Logo
7:38 am - 10:30 amBWI-SEA
5h 52mnonstop
$261Alaska Airlines
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
Use SEA Spot Saver for faster security at Seattle.
Take the free shuttle from BWI to reach DC easily.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Delta
Cheapest • from $197 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Video guide: How to find cheap flights to Baltimore
Watch video
Watch video
Watch video
Watch video
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
September
Cheapest • 23% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$197
Overall average: $472
Delta
Wed 11/5Mon 11/10
SEA - BWI • 1 stop
Cheapest non-stop
$241
Typical prices: $298-468
Alaska Airlines
Wed 1/7Wed 1/21
SEA - BWI • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Baltimore!
Expert advice

Expert advice for your flight from Seattle to Baltimore

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SEA

Use the SEA Spot Saver for expedited security screening. Book online or via the flySEA app for free access to dedicated lanes.

Read more about SEAby Harriet Baskas
BWI

Take the free shuttle from BWI to the Amtrak/MARC station for easy access to DC and Baltimore.

Read more about BWIby Harriet Baskas
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on BWI and SEA

Harriet Baskas

Harriet Baskas

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.

Read more
Booking Insights

KAYAK's insights & trends for Seattle to Baltimore flights

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

Find cheap flights to Baltimore
Find cheap flights to Baltimore

Planning a trip from Seattle to Baltimore? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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

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

If your flying dates are flexible, you should consider flying to Baltimore on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Seattle to Baltimore. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Baltimore, 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 Seattle to Baltimore is September, where tickets cost $326 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $543 and $472 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Baltimore, 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 Seattle to Baltimore, you should book around 3 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$135
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 28% increase in price.
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
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 Seattle to Baltimore

  • How far is downtown Baltimore from BWI airport?

    Downtown Baltimore is roughly 10 miles from BWI airport. There are multiple ways through which you can go from the airport to the city center including metro, taxi, and rental cars. The cheapest mode would be taking the blue-line metro towards Hunt Valley and the drop-off at the station on Lexington Street. A more convenient alternative would be a taxi or rental car. They are both easily available at the airport and will drop you at any destination in Baltimore.

  • Are there any lounges at SEA airport?

    There are about nine lounges at Seattle-Tacoma International Airport where you can hang out while waiting to board your flight. Out of the nine lounges, five have an affiliation to an airline and they include Alaska Airlines, which has three lounges, and Delta and United Airlines, each with one lounge. On top of these five lounges, there is a Centurion Lounge in Concourse B, The Club at SEA in the central terminal and south satellite, and lastly the USO Lounge which is open to active military personnel and their close family.

  • How do I make my flight from Seattle to Baltimore more sustainable?

    While flying may not be a sustainable way to travel, it is unavoidable at times. This is why we need to make our flights as eco-friendly as possible to reduce the impact on the environment. One way to do so would be to book a direct flight instead of two connecting flights. Connecting flights are usually longer and result in more carbon emissions.

  • Where are the pet relief areas at BWI airport?

    If you’re traveling with a pet through BWI airport, you should keep them in their carriers at all times except when using the pet relief areas. The pet relief areas at this airport can be found at various points both before and after security. The most conveniently located ones for arriving passengers can be found near the hourly garage parking and at the Concourse D and E connector.

  • What is the cheapest flight from Seattle to Baltimore?

    In the last 3 days, the lowest price for a flight from Seattle to Baltimore was $135 for a one-way ticket and $197 for a round-trip.

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

    No

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

    All the following airlines offer inflight Wi-Fi service on the Seattle to Baltimore flight route: Alaska Airlines, Hawaiian Airlines, JetBlue, Delta, American Airlines, and Aeromexico.

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

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

  • Which airline alliances offer flights from Seattle to Baltimore?

    oneworld is the only airline alliance operating flights between Seattle and Baltimore.

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

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Baltimore are Alaska Airlines and Southwest. With an average price for the route of $469 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Southwest is also a great choice for the route, with an average price of $433 and an overall rating of 8.0.

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

    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 Seattle to Baltimore.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Baltimore from Seattle 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 Seattle to Baltimore?

    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 Baltimore with an airline and back to Seattle with another airline. Booking your flights between Seattle and BWI 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 Seattle to Baltimore?

    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 Baltimore from Seattle 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 Seattle to Baltimore

  • Looking for a cheap flight? 25% of our users found flights on this route for $279 or less one-way and $316 or less round-trip.
  • When flying from Seattle-Tacoma International Airport (SEA), ensure you arrive at the airport at least 3h before your departure time. That should give you enough time to go through the security lines with ease.
  • To get wheelchair services at Baltimore/Washington International Thurgood Marshall Airport (BWI) you should inform your airline carrier at least 48h before your flight is supposed to take off. That gives the airport officials ample time to make all the necessary arrangements.
  • When flying out of SEA airport, you should consider staying at the Seattle Airport Marriott. The hotel is located inside the airport, putting you less than 5min away from the main terminal. Additionally, the hotel eliminates the hectic commute to the airport that most people have to deal with.
  • If you plan on leaving your car at SEA airport, check out the off-site parking options. They are usually cheaper than the parking lots inside the airport. On certain occasions, you could end up paying up to 50% less.
  • There are several rental car companies operating at BWI airport including highly-rated names such as Thrifty, Budget, Hertz, and Enterprise. They are all located at the airport rental car facility which you can access via a shuttle from the airport terminal.

Prefer to fly direct from Seattle to Baltimore?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to Baltimore/Washington.
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

Reviews of the top 5 airlines serving from Seattle to Baltimore

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Baltimore. 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 Seattle to Baltimore? 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
Alaska AirlinesOverall score based on 10000 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
Airline reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

4.0 OkayKristina, Sep 2025SEA - GTF
Read more Alaska Airlines reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

Slow boarding and the flight crew hit me with the food cart

It was very nice flight going to Seattle and coming back to Omaha. Even got in early. Very easy to check in using the Alaska Airlines App. Thank you.

They offer the only direct flight from Seattle to Pittsburgh.

Seattle airport is a mess. New bag tag system has potential, but you need more signage to guide passengers through the process as to where to go next. Told to go in one direction and then met with a very rude agent when we did. He blamed his attitude on all the folks flying over labor day that were paying his salary. Gate area for D3 is a mess compared to the North terminal. Overall Alaska is number 1 in my book.

After we boarded there was quite a long time before we actually took off, and there were no announcements from crew about why we were delayed. Later when they did make announcements they were largely inaudible. There was no food (other than for purchase) on the flight and no entertainment. Thats not a complaint, just explaining my ratings in those categories. The flight was smooth. Baggage claim was rapid.

The airline staff was great! The best safety review ive ever had!

Agent boarding us in San Diego lectured me on showing up on time for the flight, and said that if I had been three minutes later, he would have denied myself and my wife boarding. Our trusted traveler numbers were not in the system, even though I entered them when I bought the tickets. Our food orders were not in the system, even though I entered them prior to the flight. My wife requires a wheelchair, and that was delayed on both flights.

Why was I charged for a glass of wine on one flight and not on another? Why no movie or TVs? It was a long flight.

I liked that it didn't take 10 hours to drive here. Super short trip!

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

They we able to seat my companion and I next to each other. Plane’s temperature was very cool. Willl be more prepared on return trip.

All was good and they were able to seat my travel companion next to me. Thank you.

Like the ample leg room. May as well not bother with snacks if it's only a two ounce bag of pretzels. Didn't use the entertainment option. Was there one?

What an amazing flight. I haven’t experienced this level of service in a flight in years. This will be the only way to fly to Hawaii for me in the future.

Kayak sold me a ticket after check in time. Could not check in. Could not get on flight.

Love you guys are so friendly and kind and wonderful

Agents talk too fast over intercom. I know it’s memorized and we’ve all heard it before. Just slow down a little. Stop charging for checked bags. I was pleased to get my bags promptly at each end of my flight.

Everything was great except having to check in at Alaska. That was a surprise and took extra time and effort. Should have been explained somewhere maybe on the HA electronic ticket.

It was clean and the crew was great. I wish the chairs could recline just a little more and you would provide small pillows for people with bad backs. My back is fused and a little support would be great.

I accidentally made this purchase and they wouldn’t refund me even though I called immediately to cancel it.

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

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

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