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

Return flights

12 Jan - 16 Jan	jetBlue	direct
11 Jan - 14 Jan	United
19 Jan - 24 Jan	United
09 Jan - 13 Jan	United
19 Jan - 28 Jan	United
20 Jan - 24 Jan	Delta
25 Jan - 30 Jan	Delta
08 Jan - 13 Jan	United
11 Jan - 17 Jan	United
25 Jan - 28 Jan	United
29 Jan - 03 Feb	United
28 Jan - 04 Feb	Southwest Airlines
14 Jan - 04 Feb	United
26 Jan - 02 Feb	Southwest Airlines
29 Jan - 01 Feb	Southwest Airlines
29 Jan - 02 Feb	Southwest Airlines
23 Jan - 01 Feb	United
30 Jan - 02 Feb	United

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Cheapest return flights from Washington to San Juan in January from 206€

Return flights