$139 Cheap Frontier Airlines flights St. Louis (STL) to San Juan (SJU)

$139 Cheap Frontier Airlines flights St. Louis (STL) to San Juan (SJU)

Prices were available within the past 7 days and start at $139 for one-way flights and $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Aug 16 - Sat, Aug 23

STL

St. Louis

SJU

San Juan

$248 Roundtrip, found 1 day ago

$248

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 16 from St. Louis to San Juan, returning Sat, Aug 23, priced at $248 found 1 day ago

Sat, Aug 16 - Thu, Aug 21

STL

St. Louis

SJU

San Juan

$268 Roundtrip, found 1 day ago

$268

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 16 from St. Louis to San Juan, returning Thu, Aug 21, priced at $268 found 1 day ago

Fri, Aug 15 - Thu, Aug 21

STL

St. Louis

SJU

San Juan

$278 Roundtrip, found 1 day ago

$278

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 15 from St. Louis to San Juan, returning Thu, Aug 21, priced at $278 found 1 day ago

Sat, Aug 16 - Sun, Aug 24

STL

St. Louis

SJU

San Juan

$298 Roundtrip, found 1 day ago

$298

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Aug 16 from St. Louis to San Juan, returning Sun, Aug 24, priced at $298 found 1 day ago

Sun, Aug 17 - Sun, Aug 24

STL

St. Louis

SJU

San Juan

$313 Roundtrip, found 8 hours ago

$313

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Aug 17 from St. Louis to San Juan, returning Sun, Aug 24, priced at $313 found 8 hours ago

Thu, Aug 14 - Sun, Aug 24

STL

St. Louis

SJU

San Juan

$318 Roundtrip, found 1 day ago

$318

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Aug 14 from St. Louis to San Juan, returning Sun, Aug 24, priced at $318 found 1 day ago

Sun, Aug 17 - Sun, Aug 24

STL

St. Louis

SJU

San Juan

$341 Roundtrip, found 8 hours ago

$341

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Aug 17 from St. Louis to San Juan, returning Sun, Aug 24, priced at $341 found 8 hours ago

Sun, Aug 17 - Sun, Aug 24

STL

St. Louis

SJU

San Juan

$419 Roundtrip, found 8 hours ago

$419

Roundtrip

found 8 hours ago

Select Frontier Airlines flight, departing Sun, Aug 17 from St. Louis to San Juan, returning Sun, Aug 24, priced at $419 found 8 hours ago

Fri, Aug 15 - Wed, Aug 27

STL

St. Louis

SJU

San Juan

$429 Roundtrip, found 1 day ago

$429

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 15 from St. Louis to San Juan, returning Wed, Aug 27, priced at $429 found 1 day ago

Fri, Aug 15 - Mon, Aug 25

STL

St. Louis

SJU

San Juan

$446 Roundtrip, found 1 day ago

$446

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 15 from St. Louis to San Juan, returning Mon, Aug 25, priced at $446 found 1 day ago