Cheapest return ATL–SJO flights, September

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

Return flights

21 Sep - 25 Sep Southwest Airlines
01 Sep - 05 Sep Frontier Airlines
17 Sep - 08 Oct Spirit Airlines
18 Sep - 08 Oct Spirit Airlines
21 Sep - 08 Oct Spirit Airlines
18 Sep - 21 Sep Southwest Airlines
17 Sep - 21 Sep Spirit Airlines
17 Sep - 25 Sep Spirit Airlines
03 Sep - 08 Sep jetBlue
18 Sep - 25 Sep Spirit Airlines
18 Sep - 09 Oct Spirit Airlines
21 Sep - 09 Oct Spirit Airlines
21 Sep - 25 Sep Delta direct
21 Sep - 11 Oct Spirit Airlines
03 Sep - 08 Sep Delta direct
26 Sep - 29 Sep Delta direct

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

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