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

Return flights

08 Dec - 12 Dec	jetBlue	direct
10 Dec - 15 Dec	jetBlue
04 Dec - 09 Dec	jetBlue	direct
11 Dec - 14 Dec	jetBlue
11 Dec - 15 Dec	jetBlue
03 Dec - 07 Dec	jetBlue
05 Dec - 12 Dec	jetBlue
11 Dec - 21 Dec	Southwest Airlines
14 Dec - 21 Dec	jetBlue
31 Dec - 10 Jan	Southwest Airlines
24 Dec - 09 Jan	jetBlue
14 Dec - 21 Dec	jetBlue	direct
17 Dec - 07 Jan	jetBlue
24 Dec - 07 Jan	jetBlue
24 Dec - 06 Jan	jetBlue
28 Dec - 01 Jan	jetBlue
23 Dec - 02 Jan	Delta
24 Dec - 06 Jan	jetBlue	direct
27 Dec - 01 Jan	jetBlue
24 Dec - 07 Jan	jetBlue	direct

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 $219

Return flights