$69 Cheap Frontier Airlines flights Phoenix (PHX) to St. Louis (STL)

$69 Cheap Frontier Airlines flights Phoenix (PHX) to St. Louis (STL)

Prices were available within the past 7 days and start at $69 for one-way flights and $165 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jan 14 - Wed, Jan 21

PHX

Phoenix

STL

St. Louis

$165 Roundtrip, found 1 day ago

$165

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jan 14 from Phoenix to St. Louis, returning Wed, Jan 21, priced at $165 found 1 day ago

Mon, Jan 19 - Wed, Jan 21

PHX

Phoenix

STL

St. Louis

$174 Roundtrip, found 1 day ago

$174

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 19 from Phoenix to St. Louis, returning Wed, Jan 21, priced at $174 found 1 day ago

Sat, Jan 17 - Wed, Jan 21

PHX

Phoenix

STL

St. Louis

$184 Roundtrip, found 1 day ago

$184

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Jan 17 from Phoenix to St. Louis, returning Wed, Jan 21, priced at $184 found 1 day ago

Fri, Jan 16 - Wed, Jan 21

PHX

Phoenix

STL

St. Louis

$189 Roundtrip, found 1 day ago

$189

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 16 from Phoenix to St. Louis, returning Wed, Jan 21, priced at $189 found 1 day ago

Wed, Jan 14 - Mon, Jan 26

PHX

Phoenix

STL

St. Louis

$192 Roundtrip, found 1 day ago

$192

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jan 14 from Phoenix to St. Louis, returning Mon, Jan 26, priced at $192 found 1 day ago

Sun, Jan 18 - Wed, Jan 21

PHX

Phoenix

STL

St. Louis

$200 Roundtrip, found 1 day ago

$200

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Jan 18 from Phoenix to St. Louis, returning Wed, Jan 21, priced at $200 found 1 day ago