$224 Cheap Alaska Airlines flights Buffalo (BUF) to Seattle (SEA)

You’ll find affordable return Alaska Airlines flights from $447 from BUF to SEA by sorting your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $224 for a one-way trip.**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.

Search for return or one-way flights to Seattle in January or February. You could find lower fares with Alaska Airlines during these off-peak times.

To find cheap Alaska Airlines fares from Buffalo Niagara Intl. Airport (BUF) to Seattle - Tacoma Intl. Airport (SEA), start searching one to three months before your planned departure. Reserving domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the price you pay. Sunday is usually the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**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.

Fill in your dates, hit search and select the “Nonstop” filter on Expedia to browse any direct flights from BUF to SEA with Alaska Airlines or another carrier.

Browse Alaska Airlines’s earliest flights from BUF to SEA by checking our “Morning” and “Early Morning” filters. Not only will you arrive sooner, early departures also have a 20% less chance of being canceled.**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.

Alaska Airlines flights from Buffalo Niagara Intl. Airport (BUF) to Seattle come in to land at Seattle - Tacoma Intl. Airport (SEA). This is the main gateway to this destination.

Taking off from BUF to SEA with Alaska Airlines comes with a variety of perks, including top-tier customer service and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That’s in addition to the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are often free within 24 hours of making a booking, but your airline may charge you after that. For more information about altering your flights, check out your “Trips,” select your flight and click on “Manage Booking.” If you’d like the flexibility to adjust your plans without additional costs, apply the “Changes included” and “No cancel fee” filters when organizing your next break.