Cheapest return flights from Grand Rapids to San Juan in December from $310

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

Return flights

14 Dec - 19 Dec Allegiant Air
14 Dec - 21 Dec Frontier Airlines
15 Dec - 21 Dec American Airlines
16 Dec - 21 Dec Allegiant Air
31 Dec - 06 Jan Allegiant Air
25 Dec - 01 Jan Frontier Airlines
28 Dec - 03 Jan Frontier Airlines
24 Dec - 03 Jan Allegiant Air
26 Dec - 03 Jan Allegiant Air
25 Dec - 02 Jan Frontier Airlines
26 Dec - 02 Jan Allegiant Air

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

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