Cheapest return flights from San Francisco to San Diego in December from 66€

AirHint found the following cheapest return flights from San Francisco (SFO) to San Diego (SAN) in December 2025 (see full year).

Return flights

12 Dec - 15 Dec United direct
12 Dec - 14 Dec United direct
04 Dec - 07 Dec Frontier Airlines direct
05 Dec - 07 Dec Frontier Airlines direct
03 Dec - 05 Dec Southwest Airlines direct
05 Dec - 05 Dec Southwest Airlines direct
01 Dec - 07 Dec Frontier Airlines direct
01 Dec - 05 Dec Frontier Airlines direct
01 Dec - 03 Dec Frontier Airlines direct
22 Dec - 14 Jan United
18 Dec - 25 Dec Southwest Airlines direct
28 Dec - 06 Jan United direct
22 Dec - 14 Jan Alaska Airlines direct
25 Dec - 14 Jan Southwest Airlines direct
20 Dec - 03 Jan United direct

Also check the deals for one-way flights from San Francisco to San Diego 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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