Cheapest return SFO–SAN flights, December

AirHint found the following cheapest return flights from San Francisco (SFO) to San Diego (SAN) in December 2026 (see full year).

Return flights

21 Dec - 04 Jan United direct
31 Dec - 04 Jan Alaska Airlines direct
28 Dec - 31 Dec Alaska Airlines direct
21 Dec - 28 Dec Southwest Airlines direct
25 Dec - 28 Dec Southwest Airlines direct
21 Dec - 23 Dec Southwest Airlines direct
13 Dec - 03 Jan Southwest Airlines 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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