AirHint found the following cheapest return flights from Barcelona (BCN) to San Juan (SJU) in September 2026 (see full year).
Return flights
| 03 Sep - 12 Sep | United | ||
| 01 Sep - 13 Sep | United | ||
| 28 Sep - 10 Oct | Iberia |
Also check the deals for one-way flights from Barcelona to San Juan in September.
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