Cheapest return flights from Washington to San Juan in January from 179€

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

Return flights

12 Jan - 30 Jan Frontier Airlines direct
23 Jan - 26 Jan Frontier Airlines direct
07 Jan - 12 Jan Frontier Airlines
17 Jan - 24 Jan Frontier Airlines
16 Jan - 30 Jan Frontier Airlines direct
14 Jan - 28 Jan United
10 Jan - 13 Jan Frontier Airlines
09 Jan - 13 Jan Delta
17 Jan - 24 Jan United direct
16 Jan - 25 Jan Frontier Airlines

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

Skyscanner

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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