AirHint found the following cheapest return flights from Washington (DCA) to San Juan (SJU) in December 2025 (see full year).

Return flights

04 Dec - 08 Dec	jetBlue
06 Dec - 14 Dec	jetBlue
05 Dec - 14 Dec	jetBlue
11 Dec - 18 Dec	jetBlue
03 Dec - 07 Dec	jetBlue
30 Dec - 06 Jan	jetBlue
30 Dec - 10 Jan	jetBlue
15 Dec - 27 Dec	jetBlue
29 Dec - 10 Jan	jetBlue
27 Dec - 31 Dec	jetBlue
24 Dec - 30 Dec	jetBlue
19 Dec - 25 Dec	jetBlue
22 Dec - 27 Dec	jetBlue
23 Dec - 05 Jan	jetBlue
28 Dec - 04 Jan	jetBlue
27 Dec - 04 Jan	jetBlue
28 Dec - 02 Jan	jetBlue
29 Dec - 02 Jan	jetBlue
27 Dec - 02 Jan	jetBlue
23 Dec - 02 Jan	Southwest Airlines

Also check the deals for one-way flights from Washington to San Juan in December.

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 December from $327

Return flights