Cheapest return flights from Islip to Orlando in December from $138

AirHint found the following cheapest return flights from Islip (ISP) to Orlando (MCO) in December 2025 (see full year).

Return flights

10 Dec - 17 Dec Frontier Airlines direct
09 Dec - 13 Dec Frontier Airlines direct
03 Dec - 08 Dec Frontier Airlines direct
12 Dec - 16 Dec Frontier Airlines direct
05 Dec - 10 Dec Frontier Airlines direct
11 Dec - 15 Dec Frontier Airlines direct
18 Dec - 21 Dec Southwest Airlines direct
03 Dec - 07 Dec Frontier Airlines direct
10 Dec - 14 Dec Frontier Airlines direct
13 Dec - 14 Dec Frontier Airlines direct
17 Dec - 03 Jan Frontier Airlines direct
19 Dec - 03 Jan Frontier Airlines direct
26 Dec - 03 Jan Frontier Airlines direct
27 Dec - 03 Jan Frontier Airlines direct

Also check the deals for one-way flights from Islip to Orlando in December.

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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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