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

Return flights

21 Oct - 28 Oct	Spirit Airlines
27 Oct - 12 Nov	Air Canada
14 Oct - 23 Oct	United
29 Oct - 06 Nov	United
01 Oct - 08 Oct	Delta
05 Oct - 14 Oct	Delta
01 Oct - 07 Oct	Delta
04 Oct - 14 Oct	Delta
28 Oct - 05 Nov	KLM
22 Oct - 26 Oct	Air Canada
27 Oct - 04 Nov	KLM
01 Oct - 06 Oct	Air France
21 Oct - 15 Nov	Air Canada
16 Oct - 22 Oct	Lufthansa
16 Oct - 28 Oct	Lufthansa
30 Oct - 07 Nov	Delta
12 Oct - 01 Nov	Frontier Airlines
26 Oct - 03 Nov	Lufthansa
31 Oct - 08 Nov	Delta
24 Oct - 02 Nov	Frontier Airlines

Also check the deals for one-way flights from Austin to Barcelona in October.

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 October from $492

Return flights