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 $238 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Aug 14 - Sat, Aug 23

STL

St. Louis

BOS

Boston

$238 Roundtrip, found 5 days ago

$238

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Aug 14 from St. Louis to Boston, returning Sat, Aug 23, priced at $238 found 5 days ago

Thu, Aug 14 - Mon, Aug 18

STL

St. Louis

BOS

Boston

$248 Roundtrip, found 5 days ago

$248

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Aug 14 from St. Louis to Boston, returning Mon, Aug 18, priced at $248 found 5 days ago