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

Return flights

16 Jan - 23 Jan	Avianca
17 Jan - 24 Jan	Avianca
12 Jan - 19 Jan	Avianca
24 Jan - 30 Jan	Copa
11 Jan - 16 Jan	Copa
12 Jan - 14 Jan	Spirit Airlines
12 Jan - 15 Jan	Spirit Airlines
09 Jan - 14 Jan	Spirit Airlines
09 Jan - 15 Jan	Spirit Airlines
06 Jan - 14 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 199€

Return flights