Flights from St. Louis to Key West

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.

Fri, Jun 20 - Thu, Jun 26

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$319 Roundtrip, found 2 days ago

$319

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Jun 20 from Lambert-St. Louis Intl. to Key West Intl., returning Thu, Jun 26, priced at $319 found 2 days ago

Fri, Jun 20 - Wed, Jun 25

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$334 Roundtrip, found 2 days ago

$334

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Jun 20 from Lambert-St. Louis Intl. to Key West Intl., returning Wed, Jun 25, priced at $334 found 2 days ago

Sat, Jun 21 - Wed, Jun 25

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$372 Roundtrip, found 2 days ago

$372

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Wed, Jun 25, priced at $372 found 2 days ago

Sat, Jun 21 - Thu, Jun 26

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$390 Roundtrip, found 2 days ago

$390

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Thu, Jun 26, priced at $390 found 2 days ago

Sat, Jun 21 - Tue, Jun 24

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$415 Roundtrip, found 2 days ago

$415

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Tue, Jun 24, priced at $415 found 2 days ago

Fri, Jun 20 - Tue, Jun 24

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$419 Roundtrip, found 2 days ago

$419

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Jun 20 from Lambert-St. Louis Intl. to Key West Intl., returning Tue, Jun 24, priced at $419 found 2 days ago

Mon, Jun 23 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$429 Roundtrip, found 2 days ago

$429

Roundtrip

found 2 days ago

Select Delta flight, departing Mon, Jun 23 from Lambert-St. Louis Intl. to Key West Intl., returning Mon, Jun 30, priced at $429 found 2 days ago

Wed, Jun 25 - Sat, Jun 28

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$447 Roundtrip, found 2 days ago

$447

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Jun 25 from Lambert-St. Louis Intl. to Key West Intl., returning Sat, Jun 28, priced at $447 found 2 days ago

Sun, Jun 22 - Thu, Jun 26

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$459 Roundtrip, found 2 days ago

$459

Roundtrip

found 2 days ago

Select Delta flight, departing Sun, Jun 22 from Lambert-St. Louis Intl. to Key West Intl., returning Thu, Jun 26, priced at $459 found 2 days ago

Tue, Jun 24 - Sat, Jun 28

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$460 Roundtrip, found 2 days ago

$460

Roundtrip

found 2 days ago

Select American Airlines flight, departing Tue, Jun 24 from Lambert-St. Louis Intl. to Key West Intl., returning Sat, Jun 28, priced at $460 found 2 days ago

Wed, Jun 25 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$486 Roundtrip, found 2 days ago

$486

Roundtrip

found 2 days ago

Select Delta flight, departing Wed, Jun 25 from Lambert-St. Louis Intl. to Key West Intl., returning Mon, Jun 30, priced at $486 found 2 days ago

Fri, Jun 20 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$489 Roundtrip, found 2 days ago

$489

Roundtrip

found 2 days ago

Select Delta flight, departing Fri, Jun 20 from Lambert-St. Louis Intl. to Key West Intl., returning Mon, Jun 30, priced at $489 found 2 days ago

Sat, Jun 21 - Fri, Jun 27

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$495 Roundtrip, found 2 days ago

$495

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Fri, Jun 27, priced at $495 found 2 days ago

Sat, Jun 21 - Sat, Jun 28

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$511 Roundtrip, found 2 days ago

$511

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Sat, Jun 28, priced at $511 found 2 days ago

Tue, Jun 24 - Tue, Jun 24

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$519 Roundtrip, found 2 days ago

$519

Roundtrip

found 2 days ago

Select Delta flight, departing Tue, Jun 24 from Lambert-St. Louis Intl. to Key West Intl., returning Tue, Jun 24, priced at $519 found 2 days ago

Wed, Jun 25 - Sun, Jun 29

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$527 Roundtrip, found 2 days ago

$527

Roundtrip

found 2 days ago

Select American Airlines flight, departing Wed, Jun 25 from Lambert-St. Louis Intl. to Key West Intl., returning Sun, Jun 29, priced at $527 found 2 days ago

Sun, Jun 22 - Sun, Jun 29

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$540 Roundtrip, found 2 days ago

$540

Roundtrip

found 2 days ago

Select American Airlines flight, departing Sun, Jun 22 from Lambert-St. Louis Intl. to Key West Intl., returning Sun, Jun 29, priced at $540 found 2 days ago

Fri, Jun 20 - Sat, Jun 28

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$560 Roundtrip, found 2 days ago

$560

Roundtrip

found 2 days ago

Select American Airlines flight, departing Fri, Jun 20 from Lambert-St. Louis Intl. to Key West Intl., returning Sat, Jun 28, priced at $560 found 2 days ago

Thu, Jun 26 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$569 Roundtrip, found 2 days ago

$569

Roundtrip

found 2 days ago

Select Delta flight, departing Thu, Jun 26 from Lambert-St. Louis Intl. to Key West Intl., returning Mon, Jun 30, priced at $569 found 2 days ago

Sat, Jun 21 - Mon, Jun 30

STL

Lambert-St. Louis Intl.

EYW

Key West Intl.

$593 Roundtrip, found 2 days ago

$593

Roundtrip

found 2 days ago

Select United flight, departing Sat, Jun 21 from Lambert-St. Louis Intl. to Key West Intl., returning Mon, Jun 30, priced at $593 found 2 days ago