Cheapest one-way flights from San Diego to Denver in December from 22€

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

One-Way flights

18 Dec Frontier Airlines direct
25 Dec Frontier Airlines direct
17 Dec Frontier Airlines direct
07 Dec Frontier Airlines direct
22 Dec Alaska Airlines direct
20 Dec Frontier Airlines direct
05 Dec Frontier Airlines direct
23 Dec Frontier Airlines
06 Dec Frontier Airlines direct
23 Dec Southwest Airlines direct

Also check the deals for return flights from San Diego to Denver 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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