$140 Cheap Frontier Airlines flights Washington (IAD) to St. Louis (STL)

$140 Cheap Frontier Airlines flights Washington (IAD) to St. Louis (STL)

Prices were available within the past 7 days and start at $140 for one-way flights and $239 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 23 - Fri, Oct 24

IAD

Washington

STL

St. Louis

$239 Roundtrip, found 14 hours ago

$239

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Washington to St. Louis, returning Fri, Oct 24, priced at $239 found 14 hours ago

Thu, Oct 23 - Sun, Oct 26

IAD

Washington

STL

St. Louis

$254 Roundtrip, found 14 hours ago

$254

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Washington to St. Louis, returning Sun, Oct 26, priced at $254 found 14 hours ago

Fri, Oct 24 - Sun, Oct 26

IAD

Washington

STL

St. Louis

$309 Roundtrip, found 14 hours ago

$309

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Fri, Oct 24 from Washington to St. Louis, returning Sun, Oct 26, priced at $309 found 14 hours ago

Thu, Oct 23 - Sat, Oct 25

IAD

Washington

STL

St. Louis

$390 Roundtrip, found 14 hours ago

$390

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Washington to St. Louis, returning Sat, Oct 25, priced at $390 found 14 hours ago

Thu, Oct 23 - Sat, Oct 25

IAD

Washington

STL

St. Louis

$468 Roundtrip, found 14 hours ago

$468

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Thu, Oct 23 from Washington to St. Louis, returning Sat, Oct 25, priced at $468 found 14 hours ago