Cheapest return flights from Washington to San Juan in January from 132€

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

Return flights

02 Jan - 08 Jan Frontier Airlines
02 Jan - 17 Jan Frontier Airlines direct
02 Jan - 08 Jan Frontier Airlines direct
09 Jan - 16 Jan Frontier Airlines direct
03 Jan - 08 Jan Frontier Airlines
19 Jan - 23 Jan Frontier Airlines
26 Jan - 30 Jan United direct
19 Jan - 23 Jan United direct
03 Jan - 17 Jan Frontier Airlines direct
03 Jan - 08 Jan Frontier Airlines direct
23 Jan - 01 Feb Frontier Airlines
30 Jan - 02 Feb Frontier Airlines
29 Jan - 03 Feb United
29 Jan - 02 Feb Frontier Airlines
29 Jan - 02 Feb United direct
27 Jan - 01 Feb Avianca
28 Jan - 01 Feb United
29 Jan - 01 Feb United
30 Jan - 02 Feb United direct
31 Jan - 01 Feb United

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

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