AirHint found the following cheapest return flights from Dallas (DAL) to San Juan (SJU) in September 2026 (see full year).
Return flights
| 14 Sep - 21 Sep | Southwest Airlines | ||
| 02 Sep - 07 Sep | Southwest Airlines | ||
| 10 Sep - 14 Sep | Southwest Airlines | ||
| 01 Sep - 05 Sep | Delta |
Also check the deals for one-way flights from Dallas to San Juan in September.
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