AirHint found the following cheapest return flights from Houston (HOU) to Madrid (MAD) in September 2026 (see full year).
Return flights
| 01 Sep - 16 Sep | Iberia | ||
| 07 Sep - 14 Sep | Iberia | ||
| 10 Sep - 20 Sep | Iberia |
Also check the deals for one-way flights from Houston to Madrid in September.
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