Flights to Southern Idaho from St. Louis - $120

Cheap Flights from St. Louis to Southern Idaho (STL-IDA)

Prices were available within the past 7 days and start at $120 for one-way flights and $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Sep 20 - Fri, Sep 26

STL

St. Louis

BOI

Boise

$238 Roundtrip, found 5 hours ago

$238

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Sat, Sep 20 from St. Louis to Boise, returning Fri, Sep 26, priced at $238 found 5 hours ago

Fri, Aug 15 - Wed, Sep 3

STL

St. Louis

WYS

West Yellowstone

$244 Roundtrip, found 4 days ago

$244

Roundtrip

found 4 days ago

Select Delta flight, departing Fri, Aug 15 from St. Louis to West Yellowstone, returning Wed, Sep 3, priced at $244 found 4 days ago

Tue, Oct 28 - Sat, Nov 1

STL

St. Louis

BOI

Boise

$256 Roundtrip, found 6 days ago

$256

Roundtrip

found 6 days ago

Select Bargain Flight flight, departing Tue, Oct 28 from St. Louis to Boise, returning Sat, Nov 1, priced at $256 found 6 days ago

Sat, Jan 10 - Wed, Jan 14

STL

St. Louis

BOI

Boise

$259 Roundtrip, found 3 days ago

$259

Roundtrip

found 3 days ago

Select United flight, departing Sat, Jan 10 from St. Louis to Boise, returning Wed, Jan 14, priced at $259 found 3 days ago

Sun, Aug 31 - Tue, Sep 16

STL

St. Louis

BOI

Boise

$268 Roundtrip, found 3 days ago

$268

Roundtrip

found 3 days ago

Select Hawaiian Airlines flight, departing Sun, Aug 31 from St. Louis to Boise, returning Tue, Sep 16, priced at $268 found 3 days ago

Sat, Nov 8 - Tue, Nov 11

STL

St. Louis

BOI

Boise

$274 Roundtrip, found 5 days ago

$274

Roundtrip

found 5 days ago

Select Southwest Airlines flight, departing Sat, Nov 8 from St. Louis to Boise, returning Tue, Nov 11, priced at $274 found 5 days ago