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Find low faresSouthwest® flights from Seattle/Tacoma to Buffalo/Niagara Falls from $219
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1 Passenger
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today
Low fares from Seattle/Tacoma to Buffalo/Niagara Falls
$
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 05/10/2026
One-way
Basic
From
$219
Seen: 18 hrs ago
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 03/31/2026
One-way
Basic
From
$219
Seen: 23 hrs ago
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 03/11/2026
One-way
Basic
From
$219
Seen: 17 hrs ago
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 05/10/2026
One-way
Choice
From
$259
Seen: 18 hrs ago
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 03/31/2026
One-way
Choice
From
$259
Seen: 23 hrs ago
Seattle/Tacoma (SEA)to
Buffalo/Niagara Falls (BUF)
Depart: 03/11/2026
One-way
Choice
From
$259
Seen: 17 hrs ago
Explore flights from Seattle/Tacoma to Buffalo/Niagara Falls
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Flight Details
Departing from:
Seattle/Tacoma International Airport
Arriving at:
Buffalo Niagara International Airport
Distance:
2122 miles
Route Information
56† Weekly flights
† Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.
‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.
Questions we hear the most
There are 56 weekly flights from Seattle/Tacoma to Buffalo/Niagara Falls on Southwest Airlines.
To find the lowest fares by day and time to fly Seattle/Tacoma to Buffalo/Niagara Falls with Southwest, check out our Low Fare Calendar.
You can rent a car at Buffalo Niagara International Airport book yours with your flight.
Yes! Flights from Seattle/Tacoma to Buffalo/Niagara Falls—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
Check the status of your upcoming Southwest flight.
Check out the Southwest Airlines® Help Center for answers about everything Southwest.