Flights from St. Louis to Millis

Cheapest flights from St. Louis

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, Aug 9 - Thu, Aug 14

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$242 Roundtrip, found 3 days ago

$242

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Logan Intl., returning Thu, Aug 14, priced at $242 found 3 days ago

Thu, Aug 7 - Sat, Aug 9

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$250 Roundtrip, found 3 days ago

$250

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Logan Intl., returning Sat, Aug 9, priced at $250 found 3 days ago

Sat, Aug 9 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$259 Roundtrip, found 3 days ago

$259

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Logan Intl., returning Wed, Aug 13, priced at $259 found 3 days ago

Thu, Aug 7 - Thu, Aug 14

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$262 Roundtrip, found 3 days ago

$262

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Logan Intl., returning Thu, Aug 14, priced at $262 found 3 days ago

Tue, Aug 5 - Thu, Aug 14

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$270 Roundtrip, found 3 days ago

$270

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Tue, Aug 5 from Lambert-St. Louis Intl. to Logan Intl., returning Thu, Aug 14, priced at $270 found 3 days ago

Tue, Aug 5 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$287 Roundtrip, found 3 days ago

$287

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Tue, Aug 5 from Lambert-St. Louis Intl. to Logan Intl., returning Wed, Aug 13, priced at $287 found 3 days ago

Wed, Aug 6 - Thu, Aug 14

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$297 Roundtrip, found 3 days ago

$297

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Logan Intl., returning Thu, Aug 14, priced at $297 found 3 days ago

Thu, Aug 7 - Tue, Aug 12

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$303 Roundtrip, found 2 days ago

$303

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Logan Intl., returning Tue, Aug 12, priced at $303 found 2 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$311 Roundtrip, found 6 days ago

$311

Roundtrip

found 6 days ago

Select United flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $311 found 6 days ago

Wed, Aug 6 - Wed, Aug 13

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$314 Roundtrip, found 3 days ago

$314

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Wed, Aug 6 from Lambert-St. Louis Intl. to Logan Intl., returning Wed, Aug 13, priced at $314 found 3 days ago

Sat, Aug 9 - Mon, Aug 11

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$320 Roundtrip, found 3 days ago

$320

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Sat, Aug 9 from Lambert-St. Louis Intl. to Logan Intl., returning Mon, Aug 11, priced at $320 found 3 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$328 Roundtrip, found 6 days ago

$328

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $328 found 6 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$336 Roundtrip, found 6 days ago

$336

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $336 found 6 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$337 Roundtrip, found 6 days ago

$337

Roundtrip

found 6 days ago

Select United flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $337 found 6 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$338 Roundtrip, found 6 days ago

$338

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $338 found 6 days ago

Sun, Aug 10 - Mon, Aug 11

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$340 Roundtrip, found 3 days ago

$340

Roundtrip

found 3 days ago

Select Spirit Airlines flight, departing Sun, Aug 10 from Lambert-St. Louis Intl. to Logan Intl., returning Mon, Aug 11, priced at $340 found 3 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$359 Roundtrip, found 6 days ago

$359

Roundtrip

found 6 days ago

Select American Airlines flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $359 found 6 days ago

Thu, Aug 7 - Tue, Aug 12

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$363 Roundtrip, found 2 days ago

$363

Roundtrip

found 2 days ago

Select American Airlines flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Logan Intl., returning Tue, Aug 12, priced at $363 found 2 days ago

Wed, Oct 8 - Sun, Oct 19

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$375 Roundtrip, found 6 days ago

$375

Roundtrip

found 6 days ago

Select United flight, departing Wed, Oct 8 from Lambert-St. Louis Intl. to Logan Intl., returning Sun, Oct 19, priced at $375 found 6 days ago

Thu, Aug 7 - Tue, Aug 12

STL

Lambert-St. Louis Intl.

BOS

Logan Intl.

$383 Roundtrip, found 2 days ago

$383

Roundtrip

found 2 days ago

Select Delta flight, departing Thu, Aug 7 from Lambert-St. Louis Intl. to Logan Intl., returning Tue, Aug 12, priced at $383 found 2 days ago