Flights from St. Louis to Montreal

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 16 - Sat, Aug 23

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$387 Roundtrip, found 1 day ago

$387

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Sat, Aug 23, priced at $387 found 1 day ago

Sun, Aug 17 - Sat, Aug 23

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$417 Roundtrip, found 1 day ago

$417

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Aug 17 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Sat, Aug 23, priced at $417 found 1 day ago

Sat, Aug 16 - Thu, Aug 21

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$441 Roundtrip, found 1 day ago

$441

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Thu, Aug 21, priced at $441 found 1 day ago

Thu, Aug 14 - Sat, Aug 23

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$467 Roundtrip, found 1 day ago

$467

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Sat, Aug 23, priced at $467 found 1 day ago

Sun, Aug 17 - Thu, Aug 21

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$471 Roundtrip, found 1 day ago

$471

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Aug 17 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Thu, Aug 21, priced at $471 found 1 day ago

Thu, Aug 14 - Wed, Aug 20

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$502 Roundtrip, found 1 day ago

$502

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Wed, Aug 20, priced at $502 found 1 day ago

Sat, Aug 16 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$506 Roundtrip, found 1 day ago

$506

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sat, Aug 16 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $506 found 1 day ago

Thu, Aug 14 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$512 Roundtrip, found 1 day ago

$512

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $512 found 1 day ago

Fri, Aug 15 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$515 Roundtrip, found 1 day ago

$515

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Aug 15 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Fri, Aug 15, priced at $515 found 1 day ago

Thu, Aug 14 - Fri, Aug 15

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$515 Roundtrip, found 1 day ago

$515

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Fri, Aug 15, priced at $515 found 1 day ago

Thu, Aug 14 - Fri, Aug 22

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$521 Roundtrip, found 1 day ago

$521

Roundtrip

found 1 day ago

Select American Airlines flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Fri, Aug 22, priced at $521 found 1 day ago

Mon, Aug 18 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$525 Roundtrip, found 1 day ago

$525

Roundtrip

found 1 day ago

Select American Airlines flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Tue, Aug 19, priced at $525 found 1 day ago

Mon, Aug 18 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$535 Roundtrip, found 1 day ago

$535

Roundtrip

found 1 day ago

Select United flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Tue, Aug 19, priced at $535 found 1 day ago

Sun, Aug 17 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$536 Roundtrip, found 1 day ago

$536

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Aug 17 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $536 found 1 day ago

Sun, Aug 17 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$538 Roundtrip, found 1 day ago

$538

Roundtrip

found 1 day ago

Select American Airlines flight, departing Sun, Aug 17 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $538 found 1 day ago

Thu, Aug 14 - Sun, Aug 24

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$539 Roundtrip, found 1 day ago

$539

Roundtrip

found 1 day ago

Select United flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Sun, Aug 24, priced at $539 found 1 day ago

Mon, Aug 18 - Tue, Aug 19

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$563 Roundtrip, found 1 day ago

$563

Roundtrip

found 1 day ago

Select Delta flight, departing Mon, Aug 18 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Tue, Aug 19, priced at $563 found 1 day ago

Thu, Aug 14 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$643 Roundtrip, found 1 day ago

$643

Roundtrip

found 1 day ago

Select Air Canada flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $643 found 1 day ago

Thu, Aug 14 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$739 Roundtrip, found 1 day ago

$739

Roundtrip

found 1 day ago

Select Air Canada flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $739 found 1 day ago

Thu, Aug 14 - Mon, Aug 18

STL

Lambert-St. Louis Intl.

YUL

Pierre Elliott Trudeau Intl.

$1,030 Roundtrip, found 1 day ago

$1,030

Roundtrip

found 1 day ago

Select WestJet flight, departing Thu, Aug 14 from Lambert-St. Louis Intl. to Pierre Elliott Trudeau Intl., returning Mon, Aug 18, priced at $1,030 found 1 day ago