Cheapest return ATL–SJU flights, September

AirHint found the following cheapest return flights from Atlanta (ATL) to San Juan (SJU) in September 2026 (see full year).

Return flights

03 Sep - 07 Sep Frontier Airlines
05 Sep - 21 Sep Spirit Airlines
03 Sep - 06 Sep Frontier Airlines
05 Sep - 06 Sep Spirit Airlines direct
18 Sep - 08 Oct Spirit Airlines
05 Sep - 13 Sep Spirit Airlines
03 Sep - 21 Sep Spirit Airlines
10 Sep - 21 Sep Spirit Airlines
07 Sep - 11 Sep Delta direct
03 Sep - 06 Sep Spirit Airlines direct
18 Sep - 21 Sep Spirit Airlines
18 Sep - 04 Oct Spirit Airlines

Also check the deals for one-way flights from Atlanta to San Juan in September.

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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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