AirHint found the following cheapest return flights from Houston (HOU) to Madrid (MAD) in December 2025 (see full year).

Return flights

09 Dec - 16 Dec	Iberia
31 Dec - 12 Jan	KLM
07 Dec - 16 Dec	Air France
11 Dec - 14 Dec	United
05 Dec - 09 Dec	Brussels Airlines
05 Dec - 12 Dec	United
05 Dec - 11 Dec	Iberia
13 Dec - 23 Dec	Iberia
11 Dec - 26 Dec	United
29 Dec - 10 Jan	Finnair
01 Dec - 04 Dec	British Airways
02 Dec - 05 Dec	British Airways
25 Dec - 09 Jan	Frontier Airlines
23 Dec - 07 Jan	Frontier Airlines
18 Dec - 11 Jan	Spirit Airlines
27 Dec - 10 Jan	Iberia
13 Dec - 05 Jan	Frontier Airlines
19 Dec - 10 Jan	Frontier Airlines
25 Dec - 06 Jan	Frontier Airlines
26 Dec - 06 Jan	Spirit Airlines

Also check the deals for one-way flights from Houston to Madrid in December.

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 return flights from Houston to Madrid in December from 377€

Return flights