Flights from Boston to Brussels

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, Aug 2 - Sun, Aug 3

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$202 Roundtrip, found 2 days ago

$202

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Aug 3, priced at $202 found 2 days ago

Sat, Aug 2 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$208 Roundtrip, found 12 hours ago

$208

Roundtrip

found 12 hours ago

Select Spirit Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $208 found 12 hours ago

Wed, Jul 30 - Sat, Aug 2

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$215 Roundtrip, found 2 days ago

$215

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Wed, Jul 30 from Logan Intl. to Lambert-St. Louis Intl., returning Sat, Aug 2, priced at $215 found 2 days ago

Tue, Aug 5 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$217 Roundtrip, found 2 days ago

$217

Roundtrip

found 2 days ago

Select Delta flight, departing Tue, Aug 5 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $217 found 2 days ago

Fri, Aug 1 - Sun, Aug 3

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$217 Roundtrip, found 2 days ago

$217

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Fri, Aug 1 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Aug 3, priced at $217 found 2 days ago

Sat, Aug 2 - Thu, Aug 7

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$223 Roundtrip, found 4 days ago

$223

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Aug 7, priced at $223 found 4 days ago

Sun, Aug 3 - Thu, Aug 7

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$224 Roundtrip, found 2 days ago

$224

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Sun, Aug 3 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Aug 7, priced at $224 found 2 days ago

Fri, Aug 1 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$230 Roundtrip, found 2 days ago

$230

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Fri, Aug 1 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $230 found 2 days ago

Sun, Aug 3 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$237 Roundtrip, found 2 days ago

$237

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Sun, Aug 3 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $237 found 2 days ago

Fri, Aug 1 - Sat, Aug 2

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$238 Roundtrip, found 2 days ago

$238

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Fri, Aug 1 from Logan Intl. to Lambert-St. Louis Intl., returning Sat, Aug 2, priced at $238 found 2 days ago

Fri, Aug 1 - Thu, Aug 7

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$243 Roundtrip, found 4 days ago

$243

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Fri, Aug 1 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Aug 7, priced at $243 found 4 days ago

Sat, Aug 2 - Sat, Aug 9

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$244 Roundtrip, found 4 days ago

$244

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Sat, Aug 9, priced at $244 found 4 days ago

Thu, Jul 31 - Sun, Aug 3

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$249 Roundtrip, found 2 days ago

$249

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Thu, Jul 31 from Logan Intl. to Lambert-St. Louis Intl., returning Sun, Aug 3, priced at $249 found 2 days ago

Thu, Jul 31 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$253 Roundtrip, found 4 days ago

$253

Roundtrip

found 4 days ago

Select Spirit Airlines flight, departing Thu, Jul 31 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $253 found 4 days ago

Sat, Aug 2 - Wed, Aug 6

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$258 Roundtrip, found 2 days ago

$258

Roundtrip

found 2 days ago

Select Spirit Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Wed, Aug 6, priced at $258 found 2 days ago

Thu, Jul 31 - Thu, Aug 7

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$260 Roundtrip, just found

$260

Roundtrip

just found

Select Spirit Airlines flight, departing Thu, Jul 31 from Logan Intl. to Lambert-St. Louis Intl., returning Thu, Aug 7, priced at $260 just found

Fri, Aug 1 - Fri, Aug 8

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$306 Roundtrip, found 2 days ago

$306

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Aug 1 from Logan Intl. to Lambert-St. Louis Intl., returning Fri, Aug 8, priced at $306 found 2 days ago

Sat, Aug 2 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$315 Roundtrip, found 12 hours ago

$315

Roundtrip

found 12 hours ago

Select United flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $315 found 12 hours ago

Sat, Aug 2 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$374 Roundtrip, found 12 hours ago

$374

Roundtrip

found 12 hours ago

Select American Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $374 found 12 hours ago

Sat, Aug 2 - Tue, Aug 5

BOS

Logan Intl.

STL

Lambert-St. Louis Intl.

$387 Roundtrip, found 12 hours ago

$387

Roundtrip

found 12 hours ago

Select American Airlines flight, departing Sat, Aug 2 from Logan Intl. to Lambert-St. Louis Intl., returning Tue, Aug 5, priced at $387 found 12 hours ago