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

Return flights

03 Dec - 10 Dec	Air Canada
02 Dec - 09 Dec	Iberia
05 Dec - 12 Dec	Iberia
08 Dec - 15 Dec	Iberia
04 Dec - 13 Dec	Air Canada
27 Dec - 17 Jan	British Airways
07 Dec - 31 Dec	KLM
28 Dec - 08 Jan	Lufthansa
17 Dec - 25 Dec	Air Canada
17 Dec - 06 Jan	Spirit Airlines
22 Dec - 17 Jan	British Airways
18 Dec - 10 Jan	Spirit Airlines
20 Dec - 09 Jan	Spirit Airlines
17 Dec - 05 Jan	Spirit Airlines
21 Dec - 10 Jan	Viva
14 Dec - 21 Dec	Iberia
17 Dec - 24 Dec	Iberia
29 Dec - 03 Jan	Turkish Airlines
22 Dec - 01 Jan	Turkish Airlines
22 Dec - 29 Dec	Iberia

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 399€

Return flights