$184 Cheap American Airlines flights Bismarck (BIS) to Seattle (SEA)

Set the “Price (lowest to highest)” filter on Expedia to find cheap American Airlines return flights from $377 from BIS to SEA. Affordable one-way options from $184 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

American Airlines flights to Seattle are usually more affordable in the off-peak months of January and February. Whether you’re searching for a one-way or round-trip ticket, you could land a better deal then.

Look for affordable American Airlines flights from Bismarck Municipal Airport (BIS) to Seattle - Tacoma Intl. Airport (SEA) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To find out if there’s a direct journey from BIS to SEA with American Airlines or other carriers, use our “Nonstop” filter when looking for tickets.

To find the earliest departures from BIS to SEA with American Airlines, filter your results by “Early Morning” and “Morning.” Choosing an early flight generally means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Seattle - Tacoma Intl. Airport (SEA) is the main Seattle gateway for American Airlines flights from Bismarck Municipal Airport (BIS).

It’s usually possible to change or cancel your flight, although additional fees may apply if your booking was made more than 24 hours ago. Need flexible options? Use Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t penalize you if you have to revise your plans. To modify your booking, visit “Trips,” select your flight and click on “Manage Booking” for more details.