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

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

Prices were available within the past 7 days and start at for one-way flights and $220 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 25 - Sat, Nov 1

STL

St. Louis

BOS

Boston

$220 Roundtrip, found 7 hours ago

$220

Roundtrip

found 7 hours ago

Select Frontier Airlines flight, departing Sat, Oct 25 from St. Louis to Boston, returning Sat, Nov 1, priced at $220 found 7 hours ago

Sat, Oct 25 - Mon, Oct 27

STL

St. Louis

BOS

Boston

$252 Roundtrip, found 7 hours ago

$252

Roundtrip

found 7 hours ago

Select Frontier Airlines flight, departing Sat, Oct 25 from St. Louis to Boston, returning Mon, Oct 27, priced at $252 found 7 hours ago