Flights from Boston to St. Louis

Cheapest flights from Boston

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Sep 21 - Sun, Sep 28

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$194 Roundtrip, found 1 day ago

$194

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sun, Sep 21 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Sep 28, priced at $194 found 1 day ago

Sun, Sep 21 - Thu, Sep 25

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$197 Roundtrip, found 1 day ago

$197

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sun, Sep 21 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Sep 25, priced at $197 found 1 day ago

Tue, Sep 23 - Wed, Sep 24

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$217 Roundtrip, found 1 day ago

$217

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Sep 23 from Logan Intl. to Lambert-St. Louis Intl., returning Wed, Sep 24, priced at $217 found 1 day ago

Wed, Sep 24 - Sun, Sep 28

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$222 Roundtrip, found 1 day ago

$222

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Sep 24 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Sep 28, priced at $222 found 1 day ago

Sat, Sep 20 - Sun, Sep 28

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$232 Roundtrip, found 1 day ago

$232

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sat, Sep 20 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Sep 28, priced at $232 found 1 day ago

Wed, Sep 24 - Thu, Sep 25

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$232 Roundtrip, found 1 day ago

$232

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Sep 24 from Worcester Regional to Lambert-St. Louis Intl., returning Thu, Sep 25, priced at $232 found 1 day ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$234 Roundtrip, found 23 hours ago

$234

Roundtrip

found 23 hours ago

Select United flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $234 found 23 hours ago

Sat, Sep 20 - Thu, Sep 25

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$235 Roundtrip, found 1 day ago

$235

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sat, Sep 20 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Sep 25, priced at $235 found 1 day ago

Tue, Sep 23 - Wed, Sep 24

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$242 Roundtrip, found 1 day ago

$242

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Sep 23 from Worcester Regional to Lambert-St. Louis Intl., returning Wed, Sep 24, priced at $242 found 1 day ago

Fri, Sep 19 - Tue, Sep 23

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$249 Roundtrip, found 1 day ago

$249

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Sep 19 from Worcester Regional to Lambert-St. Louis Intl., returning Tue, Sep 23, priced at $249 found 1 day ago

Mon, Sep 22 - Fri, Sep 26

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$259 Roundtrip, found 1 day ago

$259

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Sep 22 from Worcester Regional to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $259 found 1 day ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$264 Roundtrip, found 23 hours ago

$264

Roundtrip

found 23 hours ago

Select United flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $264 found 23 hours ago

Mon, Sep 22 - Fri, Sep 26

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$264 Roundtrip, found 1 day ago

$264

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Sep 22 from Worcester Regional to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $264 found 1 day ago

Fri, Sep 19 - Sun, Sep 28

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$266 Roundtrip, found 1 day ago

$266

Roundtrip

found 1 day ago

Select Delta flight, departing Fri, Sep 19 from Worcester Regional to Lambert-St. Louis Intl., returning Sun, Sep 28, priced at $266 found 1 day ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$274 Roundtrip, found 23 hours ago

$274

Roundtrip

found 23 hours ago

Select United flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $274 found 23 hours ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$274 Roundtrip, found 23 hours ago

$274

Roundtrip

found 23 hours ago

Select American Airlines flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $274 found 23 hours ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$280 Roundtrip, found 23 hours ago

$280

Roundtrip

found 23 hours ago

Select American Airlines flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $280 found 23 hours ago

Wed, Sep 24 - Fri, Sep 26

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$283 Roundtrip, found 1 day ago

$283

Roundtrip

found 1 day ago

Select Delta flight, departing Wed, Sep 24 from Worcester Regional to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $283 found 1 day ago

Mon, Sep 22 - Fri, Sep 26

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$285 Roundtrip, found 23 hours ago

$285

Roundtrip

found 23 hours ago

Select Delta flight, departing Mon, Sep 22 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $285 found 23 hours ago

Tue, Sep 23 - Fri, Sep 26

ORH

Worcester Regional

STL

Lambert-St. Louis Intl.

$293 Roundtrip, found 1 day ago

$293

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Sep 23 from Worcester Regional to Lambert-St. Louis Intl., returning Fri, Sep 26, priced at $293 found 1 day ago