Cheap flights from Philadelphia to Southern Idaho

View AU$263 flight on Thu, 27 Nov. 2025Opens in a new window

Popular airlines from Philadelphia to Southern Idaho

  • American Airlines

    American Airlines

  • Alaska Airlines

    Alaska Airlines

  • Delta

    Delta

  • United

    United

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Cheap Flights from Philadelphia (ILG) to Southern Idaho (IDA)

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.

Delta
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,164 Return, found 1 day ago
AU$1,164
Return
found 1 day ago
Select Delta flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,164 found 1 day ago
Delta
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,239 Return, found 1 day ago
AU$1,239
Return
found 1 day ago
Select Delta flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,239 found 1 day ago
Delta
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,253 Return, found 1 day ago
AU$1,253
Return
found 1 day ago
Select Delta flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,253 found 1 day ago
Alaska Airlines
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,535 Return, found 1 day ago
AU$1,535
Return
found 1 day ago
Select Alaska Airlines flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,535 found 1 day ago
American Airlines
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,662 Return, found 1 day ago
AU$1,662
Return
found 1 day ago
Select American Airlines flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,662 found 1 day ago
United
Sun, 30 Nov. - Thu, 4 Dec.
PHL
Philadelphia
BOI
Boise
AU$1,962 Return, found 1 day ago
AU$1,962
Return
found 1 day ago
Select United flight, departing Sun, 30 Nov. from Philadelphia to Boise, returning Thu, 4 Dec., priced at AU$1,962 found 1 day ago

Find the cheapest month to fly from Philadelphia (PHL) to Boise (BOI)

April is typically the cheapest month to fly

From AU$287 - AU$792 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.