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

Return flights

25 Jan - 01 Feb	American Airlines
09 Jan - 13 Jan	jetBlue
18 Jan - 01 Feb	American Airlines
11 Jan - 25 Jan	American Airlines
25 Jan - 08 Feb	American Airlines
18 Jan - 25 Jan	American Airlines
08 Jan - 12 Jan	American Airlines
11 Jan - 18 Jan	American Airlines
01 Jan - 11 Jan	American Airlines
04 Jan - 18 Jan	Delta
08 Jan - 18 Jan	Sun Country Airlines
04 Jan - 12 Jan	Sun Country Airlines
11 Jan - 01 Feb	Sun Country Airlines
04 Jan - 11 Jan	Sun Country Airlines
18 Jan - 08 Feb	Sun Country Airlines

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to San Juan in January from $341

Return flights