Cheapest return flights from Denver to San Diego in January from $58

AirHint found the following cheapest return flights from Denver (DEN) to San Diego (SAN) in January 2026 (see full year).

Return flights

15 Jan - 18 Jan Frontier Airlines direct
08 Jan - 11 Jan Frontier Airlines direct
10 Jan - 17 Jan Frontier Airlines direct
23 Jan - 24 Jan Frontier Airlines direct
22 Jan - 27 Jan Frontier Airlines direct
23 Jan - 30 Jan Frontier Airlines direct
23 Jan - 25 Jan Frontier Airlines direct
10 Jan - 14 Jan Frontier Airlines direct
24 Jan - 13 Feb Frontier Airlines direct
26 Jan - 09 Feb Frontier Airlines direct
05 Jan - 11 Jan Alaska Airlines direct
10 Jan - 10 Jan Frontier Airlines direct

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

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