Cheapest return IAD–SJU flights, December

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

Return flights

09 Dec - 15 Dec United direct
28 Dec - 11 Jan United
24 Dec - 30 Dec United direct
24 Dec - 05 Jan United
22 Dec - 05 Jan United
23 Dec - 05 Jan United
20 Dec - 09 Jan United
25 Dec - 31 Dec Delta
25 Dec - 05 Jan Delta
26 Dec - 05 Jan United

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

Powered by

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.