AirHint found the following cheapest one-way flights from San Juan (SJU) to Madrid (MAD) in September 2026 (see full year).
One-Way flights
| 25 Sep | Iberia | direct | |
| 22 Sep | Finnair | direct | |
| 29 Sep | Finnair | direct | |
| 24 Sep | Delta | ||
| 13 Sep | KLM | ||
| 15 Sep | Delta | ||
| 02 Sep | KLM | ||
| 01 Sep | Delta | ||
| 14 Sep | KLM | ||
| 24 Sep | Finnair | direct |
Also check the deals for return flights from San Juan to Madrid in September.
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