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

Return flights

01 Jan - 09 Jan	Copa
10 Jan - 16 Jan	Copa
10 Jan - 19 Jan	Copa
02 Jan - 12 Jan	Copa
04 Jan - 12 Jan	Copa
22 Jan - 08 Feb	Spirit Airlines
22 Jan - 05 Feb	Spirit Airlines
22 Jan - 06 Feb	Spirit Airlines
22 Jan - 09 Feb	Spirit Airlines
15 Jan - 18 Jan	Spirit Airlines
16 Jan - 05 Feb	Spirit Airlines
16 Jan - 18 Jan	Spirit Airlines
09 Jan - 18 Jan	Spirit Airlines
09 Jan - 15 Jan	Spirit Airlines
07 Jan - 18 Jan	Spirit Airlines

Also check the deals for one-way flights from San Jose to San Juan 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.

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Cheapest return flights from San Jose to San Juan in January from $241

Return flights