Cheap flights from Portland to Southwest Idaho

View AU$341 flight on Fri, 1 Aug. 2025Opens in a new window

Popular airlines from Portland to Southwest Idaho

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Portland (PDX) to Southwest Idaho (BOI)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$621 Return, found 14 hours ago
AU$621
Return
found 14 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$621 found 14 hours ago
Alaska Airlines
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$666 Return, found 14 hours ago
AU$666
Return
found 14 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$666 found 14 hours ago
Alaska Airlines
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$690 Return, found 14 hours ago
AU$690
Return
found 14 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$690 found 14 hours ago
Alaska Airlines
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$712 Return, found 14 hours ago
AU$712
Return
found 14 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$712 found 14 hours ago
Delta
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$736 Return, found 14 hours ago
AU$736
Return
found 14 hours ago
Select Delta flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$736 found 14 hours ago
United
Fri, 1 Aug. - Tue, 5 Aug.
PDX
Portland
BOI
Boise
AU$750 Return, found 14 hours ago
AU$750
Return
found 14 hours ago
Select United flight, departing Fri, 1 Aug. from Portland to Boise, returning Tue, 5 Aug., priced at AU$750 found 14 hours ago

Find the cheapest month to fly from Portland (PDX) to Boise (BOI)

September is typically the cheapest month to fly

From AU$137 - AU$332 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.