$86 Cheap Frontier Airlines flights Chicago (MDW) to St. Louis (STL)

$86 Cheap Frontier Airlines flights Chicago (MDW) to St. Louis (STL)

Prices were available within the past 7 days and start at $86 for one-way flights and $172 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Dec 15 - Mon, Dec 22

MDW

Chicago

STL

St. Louis

$172 Roundtrip, found 9 hours ago

$172

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Dec 15 from Chicago to St. Louis, returning Mon, Dec 22, priced at $172 found 9 hours ago

Mon, Dec 15 - Sun, Dec 21

MDW

Chicago

STL

St. Louis

$173 Roundtrip, found 9 hours ago

$173

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Dec 15 from Chicago to St. Louis, returning Sun, Dec 21, priced at $173 found 9 hours ago

Thu, Jan 15 - Mon, Jan 26

MDW

Chicago

STL

St. Louis

$193 Roundtrip, found 6 hours ago

$193

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Chicago to St. Louis, returning Mon, Jan 26, priced at $193 found 6 hours ago

Mon, Dec 8 - Sun, Dec 21

MDW

Chicago

STL

St. Louis

$194 Roundtrip, found 1 day ago

$194

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Dec 8 from Chicago to St. Louis, returning Sun, Dec 21, priced at $194 found 1 day ago

Mon, Dec 15 - Thu, Dec 25

MDW

Chicago

STL

St. Louis

$197 Roundtrip, found 9 hours ago

$197

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Mon, Dec 15 from Chicago to St. Louis, returning Thu, Dec 25, priced at $197 found 9 hours ago

Fri, Dec 12 - Sun, Dec 21

MDW

Chicago

STL

St. Louis

$198 Roundtrip, found 9 hours ago

$198

Roundtrip

found 9 hours ago

Select Frontier Airlines flight, departing Fri, Dec 12 from Chicago to St. Louis, returning Sun, Dec 21, priced at $198 found 9 hours ago