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

Return flights

10 Dec - 17 Dec	Lufthansa
30 Dec - 10 Jan	Iberia
04 Dec - 11 Dec	Spirit Airlines
04 Dec - 10 Dec	Lufthansa
29 Dec - 09 Jan	British Airways
13 Dec - 16 Dec	Spirit Airlines
12 Dec - 19 Dec	Air Canada
18 Dec - 13 Jan	Frontier Airlines
25 Dec - 06 Jan	Delta
23 Dec - 06 Jan	Frontier Airlines
24 Dec - 06 Jan	Frontier Airlines
23 Dec - 05 Jan	Frontier Airlines
25 Dec - 05 Jan	Spirit Airlines
24 Dec - 05 Jan	Frontier Airlines
27 Dec - 05 Jan	Spirit Airlines
16 Dec - 30 Dec	American Airlines
24 Dec - 31 Dec	Iberia
22 Dec - 29 Dec	Iberia
20 Dec - 27 Dec	Iberia

Also check the deals for one-way flights from Austin 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 Austin to Madrid in December from $500

Return flights