$129 Cheap United flights Nashville (BNA) to Seattle (SEA)

Finding cheap one-way United Airlines flights from BNA to SEA from $129 on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our affordable return fares from $223 for your next exciting adventure.**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.

United Airlines flights to Seattle tend to be more affordable in the off-peak months of January and February. Whether you’re after a return or one-way ticket, you could land a better deal then.

Search for cheap United Airlines flights from Nashville Intl. Airport (BNA) to Seattle - Tacoma Intl. Airport (SEA) one to three months prior to your 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. Regardless of fare class and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive day 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 see if there’s a direct journey from BNA to SEA with United Airlines or other airlines, select the “Nonstop” filter when looking for tickets.

Filter your results by “Early Morning” and “Morning” to find the earliest flights from BNA to SEA. Setting off early means flight 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 primary Seattle hub for United Airlines flights from Nashville Intl. Airport (BNA).

Offering a rewarding loyalty program, United Airlines is a favorite of many passengers journeying from BNA to SEA. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

In most cases, you can reschedule or cancel your flight, although there may be a charge if you booked over 24 hours ago. Want to keep your options open? Make use of Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t charge you extra if you have to alter your plans. To update your itinerary, head to “Trips,” select your flight and click on “Manage Booking” for further information.