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

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

Return flights

19 Sep - 22 Sep Southwest Airlines
15 Sep - 22 Sep Southwest Airlines
21 Sep - 25 Sep Southwest Airlines
16 Sep - 17 Sep Southwest Airlines
16 Sep - 19 Sep Southwest Airlines
21 Sep - 27 Sep Delta
06 Sep - 13 Sep Delta
20 Sep - 27 Sep Delta
16 Sep - 23 Sep Delta
29 Sep - 03 Oct Delta
23 Sep - 07 Oct Delta
23 Sep - 29 Sep Southwest Airlines
26 Sep - 10 Oct United
20 Sep - 04 Oct United
21 Sep - 05 Oct United
28 Sep - 12 Oct United
25 Sep - 09 Oct United
30 Sep - 14 Oct United
24 Sep - 08 Oct United
27 Sep - 11 Oct United

Also check the deals for one-way 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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