Cheapest one-way flights from Washington to San Juan in January from 44€

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

One-Way flights

26 Jan Frontier Airlines direct
10 Jan Frontier Airlines direct
20 Jan Delta
18 Jan Frontier Airlines
23 Jan Frontier Airlines direct
20 Jan United direct
18 Jan United direct
15 Jan Frontier Airlines
16 Jan Frontier Airlines direct
17 Jan Frontier Airlines direct

Also check the deals for return flights from Washington to San Juan in January.

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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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