Cheapest return flights from Denver to San Juan in December from 155€

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

Return flights

11 Dec - 15 Dec Frontier Airlines
06 Dec - 11 Dec Frontier Airlines
08 Dec - 13 Dec Frontier Airlines
10 Dec - 16 Dec Frontier Airlines
11 Dec - 14 Dec Frontier Airlines
07 Dec - 13 Dec Frontier Airlines
15 Dec - 19 Dec Frontier Airlines
05 Dec - 07 Dec Frontier Airlines
18 Dec - 22 Dec Frontier Airlines
31 Dec - 08 Jan Frontier Airlines
23 Dec - 07 Jan Frontier Airlines
23 Dec - 27 Dec Frontier Airlines
29 Dec - 05 Jan Frontier Airlines
30 Dec - 02 Jan Frontier Airlines
31 Dec - 03 Jan Frontier Airlines
26 Dec - 03 Jan Frontier Airlines
29 Dec - 02 Jan Frontier Airlines
23 Dec - 02 Jan Frontier Airlines
22 Dec - 02 Jan Frontier Airlines
29 Dec - 04 Jan Frontier Airlines

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

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