$192 Cheap United flights Boston (BOS) to St. Louis (STL)

$192 Cheap United flights Boston (BOS) to St. Louis (STL)

Prices were available within the past 7 days and start at $192 for one-way flights and $303 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Sep 20 - Sat, Sep 27

BOS

Boston

STL

St. Louis

$303 Roundtrip, found 1 day ago

$303

Roundtrip

found 1 day ago

Select United flight, departing Sat, Sep 20 from Boston to St. Louis, returning Sat, Sep 27, priced at $303 found 1 day ago

Thu, Oct 9 - Sat, Oct 11

BOS

Boston

STL

St. Louis

$306 Roundtrip, found 1 day ago

$306

Roundtrip

found 1 day ago

Select United flight, departing Thu, Oct 9 from Boston to St. Louis, returning Sat, Oct 11, priced at $306 found 1 day ago

Mon, Sep 22 - Sat, Sep 27

BOS

Boston

STL

St. Louis

$340 Roundtrip, found 1 day ago

$340

Roundtrip

found 1 day ago

Select United flight, departing Mon, Sep 22 from Boston to St. Louis, returning Sat, Sep 27, priced at $340 found 1 day ago

Thu, Oct 9 - Sat, Oct 11

BOS

Boston

STL

St. Louis

$346 Roundtrip, found 1 day ago

$346

Roundtrip

found 1 day ago

Select United flight, departing Thu, Oct 9 from Boston to St. Louis, returning Sat, Oct 11, priced at $346 found 1 day ago

Sat, Sep 20 - Fri, Sep 26

BOS

Boston

STL

St. Louis

$350 Roundtrip, found 1 day ago

$350

Roundtrip

found 1 day ago

Select United flight, departing Sat, Sep 20 from Boston to St. Louis, returning Fri, Sep 26, priced at $350 found 1 day ago