$89 Cheap Flights from Baltimore (BWI) to Seattle (SEA)

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Cheap flights from Baltimore (BWI) to Seattle (SEA)

Prices were available within the past 7 days and start at $89 for one-way flights and $157 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Spirit Airlines
Frontier Airlines
Frontier Airlines
Frontier Airlines
Flight from Baltimore to Seattle (BWI - SEA) route information
Origin airport
Baltimore Washington Intl. Thurgood Marshall
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Spirit Airlines, Sun Country Airlines, United
Roundtrip price
$158
Distance
2328 mi

Baltimore to Seattle Flights

The cheapest times to fly from Baltimore to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Baltimore to Seattle are during the month of November. You can find some of the cheapest flights from Baltimore to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Baltimore to Seattle

Sunday is one of the best days to book for cheap flights from Baltimore to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Baltimore to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Baltimore to Seattle in 2024. You can also book with separate airlines for your outbound and return journeys, from $89 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Baltimore to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Baltimore to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How long does it take to fly from BWI to SEA?
Alaska Airlines operates a direct flight leaving from Baltimore Washington Intl. Thurgood Marshall Airport (BWI) at 6:58PM and reaching SEA at 9:37PM — a total flight time of 5 hours and 39 minutes. Pick your favorite seat, bring some things to keep you entertained and enjoy the ride.
Is it cheaper to buy a plane ticket from BWI Marshall to SEA last minute?
Being the spontaneous type is a rewarding way to travel the globe, but it isn’t necessarily the smartest method to track down a cheap airfare. It’s better to book your BWI to Sea-Tac Airport trip well ahead of time rather than waiting till the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. Leave your spontaneous side for when you get to Sea-Tac Airport!
What airline has the least delays from BWI to Sea-Tac Airport?
Jet off with Alaska Airlines from BWI Airport to SEA and touch down at the time on your ticket. This carrier tops the list on this route, with 86% of services arriving on time. If your flight is delayed for whatever reason, the Expedia App is an easy way to stay updated. Our useful app provides immediate trip notifications, from flight delays to gate changes and more.
What airports do you fly into for Seattle from Baltimore?
From Baltimore, you can reach Seattle through Seattle - Tacoma Intl. Airport (SEA), Renton Municipal Airport (RNT) and Boeing Field Airport (BFI). Check which hub works best for you before making your decision. If you decide on Seattle - Tacoma Intl. Airport (SEA), it’s around 12 mi south of the city center. Use the dough you save when booking your journey with Expedia to explore the city’s awesome sights, such as Space Needle and Pike Place Market.
What are the most popular departure times for flights from BWI Marshall to Sea-Tac Airport?
Between 7:00 AM - 8:00 AM is when you’ll find the largest number of Alaska Airlines flights making their way from BWI to Seattle - Tacoma Intl. Airport (SEA). Our useful tip? Get up and away in the morning. With air traffic yet to build up around airports, your chances of boarding a delay-free flight are higher.
Can I change the date of my flight from BWI Airport to Sea-Tac Airport?
Plans can get upended, so Expedia is here to help make amending your journey easy. First, access your BWI Marshall to Sea-Tac Airport itinerary through the Expedia Trips portal and browse the fare rules about what changes are allowed. If you purchased your airfare in the last 24 hours, some airlines will let you cancel at no cost and organize new flights. If you booked your fare more than 24 hours ago, connect with us via our Customer Service portal so we can help you further.
Seattle nearby Airports

Seattle Paine Field Intl. Airport

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