Flights to Southwest Idaho from Philadelphia - ￥30,570

View ￥30,570 flight on Fri, Nov 21, 2025Opens in a new window

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  • American Airlines

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  • Delta

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  • United

    United

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Cheap Flights from Philadelphia to Southwest Idaho (ILG-BOI)

Prices were available within the past 7 days and start at ￥30,570 for one-way flights and ￥56,840 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥56,840 Roundtrip, found 1 day ago
￥56,840
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥56,840 found 1 day ago
American Airlines
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥56,940 Roundtrip, found 1 day ago
￥56,940
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥56,940 found 1 day ago
American Airlines
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥56,950 Roundtrip, found 1 day ago
￥56,950
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥56,950 found 1 day ago
Delta
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥59,840 Roundtrip, found 1 day ago
￥59,840
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥59,840 found 1 day ago
American Airlines
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥59,850 Roundtrip, found 1 day ago
￥59,850
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥59,850 found 1 day ago
United
Fri, Nov 21 - Fri, Dec 5
PHL
Philadelphia
BOI
Boise
￥64,260 Roundtrip, found 1 day ago
￥64,260
Roundtrip
found 1 day ago
Select United flight, departing Fri, Nov 21 from Philadelphia to Boise, returning Fri, Dec 5, priced at ￥64,260 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 ￥27,377 - ￥75,640 per traveler.

Graph displaying average flight prices per month

*Available to Expedia members.