FFL Helper
Portland PDX
$170
BOI → PDX · Alaska Airlines
FFL Helper / Boise / Portland / September 2026
BOI → PDX · 2026-09
Boise to Portland in September 2026
Dated one-way fares from Boise to Portland in September 2026. Use the calendar to see which days are cheaper.
Lowest this month
$170
Highest this month
$170
Sample fare
$150
Airports
BOI–PDX
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Other months: August 2026 · September 2026 · Full route
September 2026 price calendar
September 2026
From $170
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$170
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Dated fares
Booking BOI to PDX in September 2026
This page is only September 2026 on the Boise to Portland route. Open the full route if you want the next months side by side.
Prices move as seats sell. Confirm the live itinerary before you book Boise to Portland in September 2026.