Cheapest return flights from San Francisco to San Juan in January from 235€

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

Return flights

07 Jan - 12 Jan Frontier Airlines
08 Jan - 12 Jan Frontier Airlines
30 Jan - 11 Feb Frontier Airlines
08 Jan - 13 Jan Frontier Airlines
14 Jan - 21 Jan Frontier Airlines
07 Jan - 16 Jan Frontier Airlines
31 Jan - 04 Feb Frontier Airlines
18 Jan - 31 Jan jetBlue
24 Jan - 01 Feb Frontier Airlines
09 Jan - 13 Jan Frontier Airlines
05 Jan - 15 Jan Frontier Airlines
22 Jan - 26 Jan Frontier Airlines
16 Jan - 24 Jan Frontier Airlines
28 Jan - 01 Feb 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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