$83 Cheap Frontier Airlines flights St. Louis (STL) to Boston (BOS)

$83 Cheap Frontier Airlines flights St. Louis (STL) to Boston (BOS)

Prices were available within the past 7 days and start at $83 for one-way flights and $216 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Dec 29 - Mon, Jan 12

STL

St. Louis

BOS

Boston

$216 Roundtrip, found 3 hours ago

$216

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Mon, Dec 29 from St. Louis to Boston, returning Mon, Jan 12, priced at $216 found 3 hours ago

Mon, Dec 29 - Fri, Jan 9

STL

St. Louis

BOS

Boston

$230 Roundtrip, found 3 hours ago

$230

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Mon, Dec 29 from St. Louis to Boston, returning Fri, Jan 9, priced at $230 found 3 hours ago

Thu, Nov 27 - Sun, Dec 14

STL

St. Louis

BOS

Boston

$233 Roundtrip, found 3 hours ago

$233

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Thu, Nov 27 from St. Louis to Boston, returning Sun, Dec 14, priced at $233 found 3 hours ago

Thu, Nov 20 - Fri, Dec 5

STL

St. Louis

BOS

Boston

$234 Roundtrip, found 3 hours ago

$234

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Thu, Nov 20 from St. Louis to Boston, returning Fri, Dec 5, priced at $234 found 3 hours ago

Wed, Dec 31 - Mon, Jan 12

STL

St. Louis

BOS

Boston

$241 Roundtrip, found 3 hours ago

$241

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Wed, Dec 31 from St. Louis to Boston, returning Mon, Jan 12, priced at $241 found 3 hours ago

Wed, Dec 31 - Fri, Jan 9

STL

St. Louis

BOS

Boston

$255 Roundtrip, found 3 hours ago

$255

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Wed, Dec 31 from St. Louis to Boston, returning Fri, Jan 9, priced at $255 found 3 hours ago

Thu, Nov 27 - Mon, Dec 1

STL

St. Louis

BOS

Boston

$258 Roundtrip, found 7 hours ago

$258

Roundtrip

found 7 hours ago

Select Frontier Airlines flight, departing Thu, Nov 27 from St. Louis to Boston, returning Mon, Dec 1, priced at $258 found 7 hours ago

Sat, Dec 13 - Tue, Dec 30

STL

St. Louis

BOS

Boston

$259 Roundtrip, found 3 hours ago

$259

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Sat, Dec 13 from St. Louis to Boston, returning Tue, Dec 30, priced at $259 found 3 hours ago

Fri, Dec 19 - Thu, Jan 8

STL

St. Louis

BOS

Boston

$280 Roundtrip, found 3 hours ago

$280

Roundtrip

found 3 hours ago

Select Frontier Airlines flight, departing Fri, Dec 19 from St. Louis to Boston, returning Thu, Jan 8, priced at $280 found 3 hours ago

Sun, Nov 23 - Thu, Nov 27

STL

St. Louis

BOS

Boston

$282 Roundtrip, found 7 hours ago

$282

Roundtrip

found 7 hours ago

Select Frontier Airlines flight, departing Sun, Nov 23 from St. Louis to Boston, returning Thu, Nov 27, priced at $282 found 7 hours ago