AirHint found the following cheapest return flights from San Francisco (SFO) to San Diego (SAN) in January 2026 (see full year).
Return flights
| 09 Jan - 12 Jan | Southwest Airlines | direct | |
| 06 Jan - 15 Jan | Frontier Airlines | ||
| 06 Jan - 15 Jan | Southwest Airlines | direct |
Also check the deals for one-way flights from San Francisco to San Diego in January.
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.
Find us on social media