Cheapest return flights from Denver to San Diego in December from 142€

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

Return flights

31 Dec - 05 Jan Frontier Airlines
29 Dec - 05 Jan Frontier Airlines
26 Dec - 05 Jan Frontier Airlines
29 Dec - 02 Jan Frontier Airlines
25 Dec - 01 Jan Frontier Airlines
31 Dec - 03 Jan Frontier Airlines
31 Dec - 04 Jan Frontier Airlines
24 Dec - 30 Dec Frontier Airlines
22 Dec - 22 Dec Frontier Airlines
23 Dec - 25 Dec Frontier Airlines
20 Dec - 25 Dec Frontier Airlines
22 Dec - 31 Dec Frontier Airlines
24 Dec - 31 Dec Frontier Airlines
26 Dec - 30 Dec Frontier Airlines
21 Dec - 25 Dec Frontier Airlines
31 Dec - 03 Jan Frontier Airlines direct
25 Dec - 29 Dec Frontier Airlines
20 Dec - 23 Dec Frontier Airlines
30 Dec - 01 Jan Frontier Airlines
30 Dec - 02 Jan Frontier Airlines

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

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