BOI → SEA · 399 mi
Boise to Seattle
$218typical business / first
✈️
What people paid
cheapest
$148
low
$178
typical
$218
high
$328
priciest
$388
Economy on this route starts around $78, so a premium seat runs about 1.9× the cheapest coach fare.
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Value
About 6% below the typical premium for a short-haul route. Routes this length normally run 2.03× economy; this one is 1.9×.
By airline
No per-airline breakdown recorded on this route.
From 134 premium and 2,414 economy tickets in the US DOT Airline Origin & Destination Survey, 2025 Q2. Historical, not live — confirm with the airline.