Cheap Frontier Airlines flights Islip (ISP) to San Juan (SJU)

Cheap Frontier Airlines flights Islip (ISP) to San Juan (SJU)

Prices were available within the past 7 days and start at for one-way flights and $305 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Jan 13 - Thu, Jan 22

ISP

Islip

SJU

San Juan

$305 Roundtrip, found 1 day ago

$305

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jan 13 from Islip to San Juan, returning Thu, Jan 22, priced at $305 found 1 day ago

Mon, Jan 12 - Wed, Jan 21

ISP

Islip

SJU

San Juan

$314 Roundtrip, found 1 day ago

$314

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 12 from Islip to San Juan, returning Wed, Jan 21, priced at $314 found 1 day ago

Tue, Jan 13 - Sat, Jan 17

ISP

Islip

SJU

San Juan

$329 Roundtrip, found 1 day ago

$329

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Jan 13 from Islip to San Juan, returning Sat, Jan 17, priced at $329 found 1 day ago

Wed, Jan 14 - Wed, Jan 21

ISP

Islip

SJU

San Juan

$335 Roundtrip, found 1 day ago

$335

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jan 14 from Islip to San Juan, returning Wed, Jan 21, priced at $335 found 1 day ago

Mon, Jan 12 - Sat, Jan 17

ISP

Islip

SJU

San Juan

$338 Roundtrip, found 1 day ago

$338

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 12 from Islip to San Juan, returning Sat, Jan 17, priced at $338 found 1 day ago

Wed, Jan 14 - Sat, Jan 17

ISP

Islip

SJU

San Juan

$359 Roundtrip, found 1 day ago

$359

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jan 14 from Islip to San Juan, returning Sat, Jan 17, priced at $359 found 1 day ago

Mon, Jan 12 - Fri, Jan 16

ISP

Islip

SJU

San Juan

$384 Roundtrip, found 1 day ago

$384

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 12 from Islip to San Juan, returning Fri, Jan 16, priced at $384 found 1 day ago

Fri, Jan 16 - Wed, Jan 21

ISP

Islip

SJU

San Juan

$396 Roundtrip, found 1 day ago

$396

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 16 from Islip to San Juan, returning Wed, Jan 21, priced at $396 found 1 day ago

Thu, Jan 15 - Fri, Jan 16

ISP

Islip

SJU

San Juan

$400 Roundtrip, found 1 day ago

$400

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jan 15 from Islip to San Juan, returning Fri, Jan 16, priced at $400 found 1 day ago

Wed, Jan 14 - Fri, Jan 16

ISP

Islip

SJU

San Juan

$405 Roundtrip, found 1 day ago

$405

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Jan 14 from Islip to San Juan, returning Fri, Jan 16, priced at $405 found 1 day ago

Mon, Jan 12 - Sun, Jan 18

ISP

Islip

SJU

San Juan

$429 Roundtrip, found 1 day ago

$429

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Mon, Jan 12 from Islip to San Juan, returning Sun, Jan 18, priced at $429 found 1 day ago

Fri, Jan 16 - Sat, Jan 17

ISP

Islip

SJU

San Juan

$437 Roundtrip, found 1 day ago

$437

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jan 16 from Islip to San Juan, returning Sat, Jan 17, priced at $437 found 1 day ago