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

Return flights

05 Dec - 12 Dec	Spirit Airlines
06 Dec - 13 Dec	Spirit Airlines
03 Dec - 10 Dec	Spirit Airlines
04 Dec - 11 Dec	Spirit Airlines
09 Dec - 16 Dec	Spirit Airlines
10 Dec - 17 Dec	United
02 Dec - 09 Dec	United
08 Dec - 15 Dec	British Airways
01 Dec - 08 Dec	British Airways
07 Dec - 14 Dec	KLM
23 Dec - 17 Jan	Iberia
31 Dec - 07 Jan	Spirit Airlines
30 Dec - 06 Jan	Lufthansa
29 Dec - 05 Jan	British Airways
25 Dec - 01 Jan	British Airways
28 Dec - 04 Jan	British Airways
26 Dec - 03 Jan	British Airways
26 Dec - 04 Jan	British Airways
27 Dec - 03 Jan	British Airways
26 Dec - 02 Jan	British Airways

Also check the deals for one-way flights from Austin to Barcelona 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 Barcelona in December from $496

Return flights