AirHint found the following cheapest one-way flights from Salt Lake City (SLC) to San Diego (SAN) in December 2025 (see full year).

One-Way flights

21 Dec	Frontier Airlines	direct
14 Dec	Frontier Airlines	direct
11 Dec	Frontier Airlines	direct
20 Dec	Southwest Airlines	direct
31 Dec	Delta	direct
13 Dec	Delta	direct
13 Dec	Southwest Airlines
12 Dec	Delta	direct
12 Dec	Southwest Airlines
06 Dec	Frontier Airlines

Also check the deals for return flights from Salt Lake City to San Diego in December.

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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Cheapest one-way flights from Salt Lake City to San Diego in December from $25

One-Way flights