Cheapest return flights from Islip to Port-of-spain in December from 660€

AirHint found the following cheapest return flights from Islip (ISP) to Port-of-spain (POS) in December 2025 (see full year).

Return flights

06 Dec - 13 Dec Frontier Airlines

Also check the deals for one-way flights from Islip to Port-of-spain in December.

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