$147 Cheap Frontier Airlines flights Islip (ISP) to San Juan (SJU)

$147 Cheap Frontier Airlines flights Islip (ISP) to San Juan (SJU)

Prices were available within the past 7 days and start at $147 for one-way flights and $294 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Sep 16 - Sun, Sep 21

ISP

Islip

SJU

San Juan

$294 Roundtrip, found 1 day ago

$294

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 16 from Islip to San Juan, returning Sun, Sep 21, priced at $294 found 1 day ago

Sun, Sep 14 - Sun, Sep 21

ISP

Islip

SJU

San Juan

$303 Roundtrip, found 1 day ago

$303

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Islip to San Juan, returning Sun, Sep 21, priced at $303 found 1 day ago

Sun, Sep 14 - Tue, Sep 23

ISP

Islip

SJU

San Juan

$312 Roundtrip, found 1 day ago

$312

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Islip to San Juan, returning Tue, Sep 23, priced at $312 found 1 day ago

Thu, Sep 11 - Sun, Sep 21

ISP

Islip

SJU

San Juan

$345 Roundtrip, found 1 day ago

$345

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Islip to San Juan, returning Sun, Sep 21, priced at $345 found 1 day ago

Thu, Sep 11 - Tue, Sep 23

ISP

Islip

SJU

San Juan

$354 Roundtrip, found 1 day ago

$354

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Islip to San Juan, returning Tue, Sep 23, priced at $354 found 1 day ago

Tue, Sep 16 - Wed, Sep 24

ISP

Islip

SJU

San Juan

$374 Roundtrip, found 1 day ago

$374

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 16 from Islip to San Juan, returning Wed, Sep 24, priced at $374 found 1 day ago

Sun, Sep 14 - Wed, Sep 24

ISP

Islip

SJU

San Juan

$383 Roundtrip, found 1 day ago

$383

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Islip to San Juan, returning Wed, Sep 24, priced at $383 found 1 day ago

Sat, Sep 13 - Sun, Sep 21

ISP

Islip

SJU

San Juan

$414 Roundtrip, found 1 day ago

$414

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Sep 13 from Islip to San Juan, returning Sun, Sep 21, priced at $414 found 1 day ago

Thu, Sep 11 - Wed, Sep 24

ISP

Islip

SJU

San Juan

$425 Roundtrip, found 1 day ago

$425

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Sep 11 from Islip to San Juan, returning Wed, Sep 24, priced at $425 found 1 day ago

Wed, Sep 10 - Thu, Sep 18

ISP

Islip

SJU

San Juan

$464 Roundtrip, found 1 day ago

$464

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Wed, Sep 10 from Islip to San Juan, returning Thu, Sep 18, priced at $464 found 1 day ago