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

Return flights

28 Oct - 04 Nov	United
29 Oct - 05 Nov	United
30 Oct - 06 Nov	United
27 Oct - 03 Nov	United
31 Oct - 07 Nov	United
21 Oct - 28 Oct	United
22 Oct - 29 Oct	United
15 Oct - 22 Oct	Air Canada
14 Oct - 21 Oct	Air France
26 Oct - 02 Nov	British Airways
24 Oct - 31 Oct	KLM
25 Oct - 01 Nov	Delta
23 Oct - 30 Oct	United
13 Oct - 20 Oct	British Airways
19 Oct - 26 Oct	Air Canada
17 Oct - 24 Oct	Spirit Airlines
16 Oct - 23 Oct	Air Canada

Also check the deals for one-way flights from Austin to Lisbon 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 Lisbon in October from $595

Return flights