Cheapest return flights from Newark to San Juan in December from $116

AirHint found the following cheapest return flights from Newark (EWR) to San Juan (SJU) in December 2025 (see full year).

Return flights

03 Dec - 06 Dec Frontier Airlines direct
03 Dec - 10 Dec Frontier Airlines direct
03 Dec - 13 Dec Frontier Airlines direct
01 Dec - 13 Dec Frontier Airlines direct
01 Dec - 10 Dec Frontier Airlines direct
10 Dec - 19 Dec Frontier Airlines
13 Dec - 19 Dec Spirit Airlines
02 Dec - 06 Dec Frontier Airlines
01 Dec - 03 Dec Frontier Airlines direct
10 Dec - 17 Dec Frontier Airlines
31 Dec - 12 Jan Frontier Airlines
13 Dec - 17 Jan Spirit Airlines
31 Dec - 17 Jan Spirit Airlines
31 Dec - 14 Jan Spirit Airlines
31 Dec - 13 Jan Spirit Airlines
31 Dec - 12 Jan Spirit Airlines direct
31 Dec - 16 Jan Spirit Airlines direct
31 Dec - 15 Jan Spirit Airlines direct
31 Dec - 20 Jan Spirit Airlines direct
31 Dec - 17 Jan Spirit Airlines direct

Also check the deals for one-way flights from Newark to San Juan in December.

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