Cheapest one-way flights from Washington to San Juan in December from 108€

AirHint found the following cheapest one-way flights from Washington (IAD) to San Juan (SJU) in December 2025 (see full year).

One-Way flights

30 Dec Frontier Airlines direct
29 Dec Frontier Airlines direct
06 Dec United direct
05 Dec Frontier Airlines
13 Dec Frontier Airlines
28 Dec Frontier Airlines direct
05 Dec United direct
26 Dec Frontier Airlines direct
24 Dec Frontier Airlines
23 Dec Frontier Airlines

Also check the deals for return 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.