Cheapest one-way flights from Denver to San Francisco in December from $34

AirHint found the following cheapest one-way flights from Denver (DEN) to San Francisco (SFO) in December 2025 (see full year).

One-Way flights

25 Dec Frontier Airlines direct
24 Dec Frontier Airlines
17 Dec Frontier Airlines
21 Dec Frontier Airlines
12 Dec Frontier Airlines direct
20 Dec Frontier Airlines direct
18 Dec Frontier Airlines
15 Dec Frontier Airlines
24 Dec Frontier Airlines direct
13 Dec Frontier Airlines

Also check the deals for return flights from Denver to San Francisco in December.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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