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Find low faresSouthwest® flights from Boise to Seattle/Tacoma from $79
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Low fares from Boise to Seattle/Tacoma
$
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 02/28/2026
One-way
Basic
From
$79
Seen: 13 hrs ago
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 04/15/2026
One-way
Basic
From
$79
Seen: 1 hour ago
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 03/07/2026
One-way
Basic
From
$79
Seen: 11 hrs ago
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 02/25/2026
One-way
Basic
From
$79
Seen: 11 hrs ago
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 04/01/2026
One-way
Basic
From
$79
Seen: 13 hrs ago
Boise (BOI)to
Seattle/Tacoma (SEA)
Depart: 04/14/2026
One-way
Basic
From
$79
Seen: 4 hrs ago
Explore flights from Boise to Seattle/Tacoma
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Flight Details
Departing from:
Boise Airport
Arriving at:
Seattle/Tacoma International Airport
Distance:
399 miles
Route Information
124† 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 124 weekly flights from Boise to Seattle/Tacoma on Southwest Airlines.
To find the lowest fares by day and time to fly Boise 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 Boise 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.