Cheap Frontier Airlines flights Milwaukee (MKE) to Islip (ISP)

Cheap Frontier Airlines flights Milwaukee (MKE) to Islip (ISP)

Prices were available within the past 7 days and start at for one-way flights and $450 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Dec 29 - Mon, Jan 4

MKE

Milwaukee

ISP

Islip

$450 Roundtrip, found 23 hours ago

$450

Roundtrip

found 23 hours ago

Select Frontier Airlines flight, departing Tue, Dec 29 from Milwaukee to Islip, returning Mon, Jan 4, priced at $450 found 23 hours ago

Sun, Dec 27 - Mon, Jan 4

MKE

Milwaukee

ISP

Islip

$629 Roundtrip, found 23 hours ago

$629

Roundtrip

found 23 hours ago

Select Frontier Airlines flight, departing Sun, Dec 27 from Milwaukee to Islip, returning Mon, Jan 4, priced at $629 found 23 hours ago