Cheapest return flights from San Antonio to Denver in December from $236

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

Return flights

31 Dec - 07 Jan Frontier Airlines
30 Dec - 30 Dec Frontier Airlines
31 Dec - 01 Jan Frontier Airlines direct
30 Dec - 30 Dec Frontier Airlines direct
31 Dec - 02 Jan Frontier Airlines direct
29 Dec - 05 Jan Frontier Airlines
28 Dec - 01 Jan Frontier Airlines
29 Dec - 03 Jan Frontier Airlines
29 Dec - 05 Jan Frontier Airlines direct
26 Dec - 29 Dec Frontier Airlines
29 Dec - 03 Jan Frontier Airlines direct
28 Dec - 01 Jan Frontier Airlines direct
26 Dec - 29 Dec Frontier Airlines direct
31 Dec - 07 Jan Southwest Airlines direct
25 Dec - 30 Dec United direct

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

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