Cheapest return flights from Miami to San Juan in December from $124

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

Return flights

31 Dec - 01 Jan Frontier Airlines direct
31 Dec - 08 Jan Frontier Airlines direct
31 Dec - 16 Jan Spirit Airlines direct
31 Dec - 12 Jan Spirit Airlines direct
31 Dec - 09 Jan Spirit Airlines direct
31 Dec - 11 Jan Spirit Airlines direct
31 Dec - 10 Jan Spirit Airlines
31 Dec - 17 Jan Spirit Airlines
30 Dec - 10 Jan Frontier Airlines direct
31 Dec - 07 Jan Frontier Airlines
30 Dec - 31 Dec Frontier Airlines direct

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

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