Flights from Boston to St. Clair

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.

Sat, Jun 21 - Mon, Jun 23

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$213 Roundtrip, found 1 day ago

$213

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sat, Jun 21 from Logan Intl. to Lambert-St. Louis Intl., returning Mon, Jun 23, priced at $213 found 1 day ago

Thu, Jun 19 - Mon, Jun 23

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$229 Roundtrip, found 1 day ago

$229

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Mon, Jun 23, priced at $229 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$265 Roundtrip, found 1 day ago

$265

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $265 found 1 day ago

Thu, Jun 19 - Fri, Jun 20

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$269 Roundtrip, found 1 day ago

$269

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Jun 20, priced at $269 found 1 day ago

Tue, Jun 17 - Tue, Jun 24

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$277 Roundtrip, found 1 day ago

$277

Roundtrip

found 1 day ago

Select Delta flight, departing Tue, Jun 17 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Jun 24, priced at $277 found 1 day ago

Sun, Jun 22 - Mon, Jun 23

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$309 Roundtrip, found 1 day ago

$309

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sun, Jun 22 from Logan Intl. to Lambert-St. Louis Intl., returning Mon, Jun 23, priced at $309 found 1 day ago

Sat, Jun 21 - Tue, Jun 24

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$324 Roundtrip, found 1 day ago

$324

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Jun 21 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Jun 24, priced at $324 found 1 day ago

Mon, Jun 16 - Tue, Jun 24

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$359 Roundtrip, found 1 day ago

$359

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 16 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Jun 24, priced at $359 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$360 Roundtrip, found 1 day ago

$360

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $360 found 1 day ago

Sat, Jun 21 - Sat, Jun 21

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$371 Roundtrip, found 1 day ago

$371

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Jun 21 from Logan Intl. to Lambert-St. Louis Intl., returning Sat, Jun 21, priced at $371 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$393 Roundtrip, found 1 day ago

$393

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $393 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$402 Roundtrip, found 1 day ago

$402

Roundtrip

found 1 day ago

Select Delta flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $402 found 1 day ago

Mon, Jun 16 - Thu, Jun 19

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$402 Roundtrip, found 1 day ago

$402

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jun 16 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Jun 19, priced at $402 found 1 day ago

Mon, Jun 16 - Sat, Jun 21

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$406 Roundtrip, found 1 day ago

$406

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Jun 16 from Logan Intl. to Lambert-St. Louis Intl., returning Sat, Jun 21, priced at $406 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$413 Roundtrip, found 1 day ago

$413

Roundtrip

found 1 day ago

Select United flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $413 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$414 Roundtrip, found 1 day ago

$414

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $414 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$423 Roundtrip, found 1 day ago

$423

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $423 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$431 Roundtrip, found 1 day ago

$431

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $431 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$515 Roundtrip, found 1 day ago

$515

Roundtrip

found 1 day ago

Select United flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $515 found 1 day ago

Thu, Jun 19 - Sun, Jun 22

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$521 Roundtrip, found 1 day ago

$521

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Jun 19 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Jun 22, priced at $521 found 1 day ago