Cheapest return flights from San Francisco to San Juan in January from 304€

AirHint found the following cheapest return flights from San Francisco (SFO) to San Juan (SJU) in January 2026 (see full year).

Return flights

31 Jan - 04 Feb Southwest Airlines
30 Jan - 04 Feb Frontier Airlines
07 Jan - 16 Jan Frontier Airlines
13 Jan - 20 Jan United
31 Jan - 06 Feb United
31 Jan - 07 Feb United
05 Jan - 15 Jan United
03 Jan - 10 Jan Frontier Airlines
30 Jan - 02 Feb Frontier Airlines
21 Jan - 22 Feb Frontier Airlines
31 Jan - 08 Feb Southwest Airlines
21 Jan - 26 Jan Frontier Airlines
03 Jan - 08 Jan Frontier Airlines
02 Jan - 08 Jan Frontier Airlines
04 Jan - 08 Jan Frontier Airlines
15 Jan - 20 Jan Frontier Airlines

Also check the deals for one-way flights from San Francisco to San Juan in January.

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