$182 Cheap Frontier Airlines flights St. Louis (STL) to Boston (BOS)

$182 Cheap Frontier Airlines flights St. Louis (STL) to Boston (BOS)

Prices were available within the past 7 days and start at $182 for one-way flights and $320 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Aug 3 - Wed, Aug 13

STL

St. Louis

BOS

Boston

$320 Roundtrip, found 1 day ago

$320

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Aug 3 from St. Louis to Boston, returning Wed, Aug 13, priced at $320 found 1 day ago

Sun, Jul 13 - Sat, Jul 19

STL

St. Louis

BOS

Boston

$332 Roundtrip, found 5 hours ago

$332

Roundtrip

found 5 hours ago

Select Frontier Airlines flight, departing Sun, Jul 13 from St. Louis to Boston, returning Sat, Jul 19, priced at $332 found 5 hours ago

Sun, Aug 3 - Wed, Aug 13

STL

St. Louis

BOS

Boston

$339 Roundtrip, found 1 day ago

$339

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Aug 3 from St. Louis to Boston, returning Wed, Aug 13, priced at $339 found 1 day ago

Thu, Jul 31 - Fri, Aug 15

STL

St. Louis

BOS

Boston

$341 Roundtrip, found 1 day ago

$341

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 31 from St. Louis to Boston, returning Fri, Aug 15, priced at $341 found 1 day ago