$199 Cheap United flights Boston (BOS) to St. Louis (STL)

$199 Cheap United flights Boston (BOS) to St. Louis (STL)

Prices were available within the past 7 days and start at $199 for one-way flights and $397 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Dec 25 - Wed, Dec 31

BOS

Boston

STL

St. Louis

$397 Roundtrip, just found

$397

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Wed, Dec 31, priced at $397 just found

Thu, Dec 25 - Fri, Jan 2

BOS

Boston

STL

St. Louis

$524 Roundtrip, just found

$524

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Fri, Jan 2, priced at $524 just found

Thu, Dec 25 - Fri, Dec 26

BOS

Boston

STL

St. Louis

$610 Roundtrip, just found

$610

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Fri, Dec 26, priced at $610 just found

Thu, Dec 25 - Sat, Dec 27

BOS

Boston

STL

St. Louis

$614 Roundtrip, just found

$614

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Sat, Dec 27, priced at $614 just found

Thu, Dec 25 - Sat, Dec 27

BOS

Boston

STL

St. Louis

$619 Roundtrip, just found

$619

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Sat, Dec 27, priced at $619 just found

Thu, Dec 25 - Sat, Dec 27

BOS

Boston

STL

St. Louis

$654 Roundtrip, just found

$654

Roundtrip

just found

Select United flight, departing Thu, Dec 25 from Boston to St. Louis, returning Sat, Dec 27, priced at $654 just found