AirHint found the following cheapest one-way flights from Houston (HOU) to Madrid (MAD) in August 2025 (see full year).

One-Way flights

13 Aug	Spirit Airlines
03 Aug	Spirit Airlines
10 Aug	Spirit Airlines
25 Aug	Spirit Airlines
28 Aug	Frontier Airlines
26 Aug	Spirit Airlines
27 Aug	Spirit Airlines
21 Aug	Frontier Airlines
07 Aug	Spirit Airlines
29 Aug	Spirit Airlines

Also check the deals for return flights from Houston to Madrid in August.

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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Cheapest one-way flights from Houston to Madrid in August from 199€

One-Way flights