Cheapest return flights from San Francisco to San Juan in January from $264

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

Return flights

29 Jan - 03 Feb United
13 Jan - 20 Jan American Airlines
07 Jan - 16 Jan Frontier Airlines
27 Jan - 02 Feb Frontier Airlines
06 Jan - 13 Jan Frontier Airlines
22 Jan - 26 Jan Frontier Airlines
07 Jan - 14 Jan United
31 Jan - 04 Feb American Airlines
20 Jan - 27 Jan jetBlue
09 Jan - 15 Jan Frontier Airlines
03 Jan - 10 Jan Frontier Airlines
17 Jan - 18 Jan American Airlines
02 Jan - 08 Jan Frontier Airlines

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

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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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