$154 Cheap Delta flights Seattle (SEA) to Buffalo (BUF)

Scoring cheap one-way Delta Air Lines flights from SEA to BUF from $154 on Expedia is simple — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $258 for your next 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.

Delta Air Lines flights to Buffalo are usually more affordable in the off-peak months of January and February. Whether you’re in search of a one-way or a return ticket, you could find a better deal then.

Start searching one to three months ahead of your travel date to find cheaper fares on Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Buffalo Niagara Intl. Airport (BUF). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Nail your timing, and you can enjoy significant savings on domestic trips.*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.

Simply enter your dates, click search and use the “Nonstop” filter on Expedia to browse any direct flights from SEA to BUF with Delta Air Lines or other carriers.

Filter your results by “Morning” and “Early Morning” to see the earliest departures from SEA to BUF. Leaving early means you’re 20% less likely to experience cancellations.**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.

Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Buffalo come in to Buffalo Niagara Intl. Airport (BUF). This is the main gateway to this destination.

With a rewarding loyalty program and an excellent in-flight experience, Delta Air Lines is a popular option for many travelers heading from SEA to BUF. Also, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are typically free within 24 hours of making a booking, but your airline may charge a fee after that time. For further information about altering your reservation, check out your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without extra charges, check the “No cancel fee” or “Changes included” filter when planning your next adventure.