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

Return flights

03 Dec - 12 Dec	Air Canada
02 Dec - 10 Dec	Air Canada
10 Dec - 18 Dec	Air Canada
10 Dec - 17 Dec	Air Canada
31 Dec - 13 Jan	Air Canada
11 Dec - 18 Dec	Air Canada
01 Dec - 11 Dec	British Airways
02 Dec - 09 Dec	Iberia
11 Dec - 22 Dec	Air Canada
04 Dec - 11 Dec	Iberia
11 Dec - 14 Dec	United
15 Dec - 10 Jan	Spirit Airlines
21 Dec - 14 Jan	Iberia
23 Dec - 17 Jan	Frontier Airlines
13 Dec - 05 Jan	Spirit Airlines
23 Dec - 07 Jan	Frontier Airlines
24 Dec - 06 Jan	Spirit Airlines
22 Dec - 17 Jan	British Airways
21 Dec - 10 Jan	Frontier Airlines
20 Dec - 10 Jan	Frontier 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 370€

Return flights