Cheapest return DCA–SJU flights, December

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

Return flights

09 Dec - 15 Dec United
13 Dec - 19 Dec Southwest Airlines
31 Dec - 09 Jan Delta
13 Dec - 13 Dec United
23 Dec - 08 Jan United
19 Dec - 24 Dec jetBlue
19 Dec - 30 Dec jetBlue
31 Dec - 03 Jan United
26 Dec - 04 Jan United
27 Dec - 03 Jan United
26 Dec - 03 Jan United
27 Dec - 02 Jan United
26 Dec - 02 Jan United

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

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