AirHint found the following cheapest return flights from Cleveland (CLE) to San Juan (SJU) in September 2026 (see full year).
Return flights
| 02 Sep - 06 Sep | Frontier Airlines | ||
| 09 Sep - 30 Sep | Delta | ||
| 17 Sep - 26 Sep | United | ||
| 11 Sep - 19 Sep | Delta | ||
| 29 Sep - 06 Oct | Delta | ||
| 03 Sep - 07 Sep | Frontier Airlines | ||
| 18 Sep - 26 Sep | United |
Also check the deals for one-way flights from Cleveland to San Juan in September.
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