AirHint found the following cheapest one-way flights from Houston (IAH) to Madrid (MAD) in September 2026 (see full year).
One-Way flights
| 07 Sep | British Airways | ||
| 06 Sep | British Airways | ||
| 08 Sep | Iberia | ||
| 30 Sep | Frontier Airlines | ||
| 28 Sep | Frontier Airlines | ||
| 21 Sep | Frontier Airlines | ||
| 26 Sep | Frontier Airlines | ||
| 23 Sep | Frontier Airlines |
Also check the deals for return flights from Houston to Madrid in September.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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