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Find low faresSouthwest® flights from Buffalo/Niagara Falls to Seattle/Tacoma from $180
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1 Passenger
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Low fares from Buffalo/Niagara Falls to Seattle/Tacoma
$
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 04/14/2026
One-way
Basic
From
$180
Seen: 22 hrs ago
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 04/15/2026
One-way
Basic
From
$180
Seen: 13 hrs ago
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 03/25/2026
One-way
Basic
From
$180
Seen: 18 hrs ago
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 03/24/2026
One-way
Basic
From
$180
Seen: 10 hrs ago
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 04/22/2026
One-way
Basic
From
$180
Seen: 18 hrs ago
Buffalo/Niagara Falls (BUF)to
Seattle/Tacoma (SEA)
Depart: 04/21/2026
One-way
Basic
From
$180
Seen: 16 hrs ago
Explore flights from Buffalo/Niagara Falls to Seattle/Tacoma
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Flight Details
Departing from:
Buffalo Niagara International Airport
Arriving at:
Seattle/Tacoma International Airport
Distance:
2122 miles
Route Information
68† 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 68 weekly flights from Buffalo/Niagara Falls to Seattle/Tacoma on Southwest Airlines.
To find the lowest fares by day and time to fly Buffalo/Niagara Falls to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
Yes! Flights from Buffalo/Niagara Falls to Seattle/Tacoma—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.