Cheapest return flights from Denver to San Salvador in December from $341

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

Return flights

05 Dec - 12 Dec Frontier Airlines
05 Dec - 08 Dec Frontier Airlines
05 Dec - 06 Dec Frontier Airlines
12 Dec - 20 Dec Frontier Airlines
20 Dec - 30 Dec Frontier Airlines
19 Dec - 19 Jan Frontier Airlines
24 Dec - 29 Dec Frontier Airlines
18 Dec - 04 Jan Frontier Airlines
22 Dec - 01 Jan Frontier Airlines

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

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