Cheapest return flights from Islip to San Juan in February from $179

AirHint found the following cheapest return flights from Islip (ISP) to San Juan (SJU) in February 2026 (see full year).

Return flights

05 Feb - 11 Feb Frontier Airlines
21 Feb - 28 Feb Frontier Airlines
28 Feb - 03 Mar Frontier Airlines
28 Feb - 04 Mar Frontier Airlines
02 Feb - 11 Feb Frontier Airlines
26 Feb - 28 Feb Frontier Airlines
02 Feb - 04 Feb Frontier Airlines
02 Feb - 07 Feb Frontier Airlines
05 Feb - 14 Feb Frontier Airlines
05 Feb - 10 Feb Frontier Airlines
23 Feb - 26 Feb Frontier Airlines
26 Feb - 03 Mar Frontier Airlines
26 Feb - 04 Mar Frontier Airlines
23 Feb - 04 Mar Frontier Airlines
23 Feb - 28 Feb Frontier Airlines
26 Feb - 05 Mar Frontier Airlines
23 Feb - 02 Mar Frontier Airlines
27 Feb - 04 Mar Frontier Airlines
27 Feb - 03 Mar Frontier Airlines
27 Feb - 05 Mar Frontier Airlines

Also check the deals for one-way flights from Islip to San Juan in February.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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