$54 Cheap Frontier Airlines flights St. Louis (STL) to Phoenix (PHX)

$54 Cheap Frontier Airlines flights St. Louis (STL) to Phoenix (PHX)

Prices were available within the past 7 days and start at $54 for one-way flights and $108 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Nov 24 - Fri, Nov 28

STL

St. Louis

PHX

Phoenix

$108 Roundtrip, found 5 days ago

$108

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Nov 24 from St. Louis to Phoenix, returning Fri, Nov 28, priced at $108 found 5 days ago

Fri, Nov 28 - Fri, Dec 5

STL

St. Louis

PHX

Phoenix

$109 Roundtrip, found 6 days ago

$109

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Nov 28 from St. Louis to Phoenix, returning Fri, Dec 5, priced at $109 found 6 days ago

Mon, Dec 8 - Fri, Dec 12

STL

St. Louis

PHX

Phoenix

$120 Roundtrip, found 19 hours ago

$120

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Mon, Dec 8 from St. Louis to Phoenix, returning Fri, Dec 12, priced at $120 found 19 hours ago

Mon, Nov 24 - Thu, Dec 4

STL

St. Louis

PHX

Phoenix

$124 Roundtrip, found 5 days ago

$124

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Mon, Nov 24 from St. Louis to Phoenix, returning Thu, Dec 4, priced at $124 found 5 days ago

Sat, Dec 6 - Fri, Dec 12

STL

St. Louis

PHX

Phoenix

$125 Roundtrip, found 19 hours ago

$125

Roundtrip

found 19 hours ago

Select Frontier Airlines flight, departing Sat, Dec 6 from St. Louis to Phoenix, returning Fri, Dec 12, priced at $125 found 19 hours ago

Fri, Nov 28 - Sun, Dec 7

STL

St. Louis

PHX

Phoenix

$128 Roundtrip, found 6 days ago

$128

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Nov 28 from St. Louis to Phoenix, returning Sun, Dec 7, priced at $128 found 6 days ago