Cheapest return flights from Denver to San Francisco in January from $47

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

Return flights

13 Jan - 14 Jan Frontier Airlines direct
07 Jan - 14 Jan Frontier Airlines direct
10 Jan - 11 Jan Frontier Airlines direct
10 Jan - 12 Jan Frontier Airlines direct
21 Jan - 26 Jan Frontier Airlines direct
13 Jan - 16 Jan Frontier Airlines direct
17 Jan - 18 Jan Frontier Airlines direct
15 Jan - 18 Jan Frontier Airlines direct
16 Jan - 18 Jan Frontier Airlines direct
18 Jan - 25 Jan Frontier Airlines direct

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

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