Cheap flights from Phoenix to Southwest Idaho

View AU$107 flight on Mon, 8 Sep. 2025Opens in a new window

Popular airlines from Phoenix to Southwest Idaho

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Phoenix (PHX) 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. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$450 Return, found 22 hours ago
AU$450
Return
found 22 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$450 found 22 hours ago
Delta
Fri, 1 Aug. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$465 Return, found 22 hours ago
AU$465
Return
found 22 hours ago
Select Delta flight, departing Fri, 1 Aug. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$465 found 22 hours ago
Alaska Airlines
Fri, 1 Aug. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$492 Return, found 22 hours ago
AU$492
Return
found 22 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$492 found 22 hours ago
Alaska Airlines
Fri, 1 Aug. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$503 Return, found 22 hours ago
AU$503
Return
found 22 hours ago
Select Alaska Airlines flight, departing Fri, 1 Aug. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$503 found 22 hours ago
United
Thu, 31 Jul. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$655 Return, found 22 hours ago
AU$655
Return
found 22 hours ago
Select United flight, departing Thu, 31 Jul. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$655 found 22 hours ago
American Airlines
Fri, 1 Aug. - Sun, 3 Aug.
PHX
Phoenix
BOI
Boise
AU$701 Return, found 22 hours ago
AU$701
Return
found 22 hours ago
Select American Airlines flight, departing Fri, 1 Aug. from Phoenix to Boise, returning Sun, 3 Aug., priced at AU$701 found 22 hours ago

Find the cheapest month to fly from Phoenix (PHX) to Boise (BOI)

August is typically the cheapest month to fly

From AU$139 - AU$359 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.