Cheapest one-way flights from Washington to San Juan in September from 66€

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

One-Way flights

06 Sep Southwest Airlines
08 Sep Southwest Airlines
07 Sep Southwest Airlines
19 Sep Southwest Airlines
02 Sep Southwest Airlines
01 Sep Delta
20 Sep Delta
23 Sep United
27 Sep United
05 Sep Southwest Airlines

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

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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