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

Return flights

26 Jan - 30 Jan	jetBlue
11 Jan - 16 Jan	American Airlines
19 Jan - 23 Jan	jetBlue
13 Jan - 21 Jan	jetBlue
12 Jan - 21 Jan	jetBlue
14 Jan - 23 Jan	jetBlue
14 Jan - 21 Jan	jetBlue
24 Jan - 29 Jan	American Airlines
11 Jan - 14 Jan	American Airlines
27 Jan - 03 Feb	American Airlines
29 Jan - 03 Feb	American Airlines
06 Jan - 14 Jan	jetBlue
31 Jan - 01 Feb	Southwest Airlines
28 Jan - 02 Feb	Southwest Airlines
29 Jan - 01 Feb	Southwest Airlines
23 Jan - 01 Feb	Southwest Airlines
30 Jan - 02 Feb	jetBlue
29 Jan - 02 Feb	Southwest Airlines

Also check the deals for one-way flights from Washington 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 Washington to San Juan in January from $228

Return flights