AirHint found the following cheapest return flights from Austin (AUS) to Lisbon (LIS) in May 2026 (see full year).

Return flights

01 May - 09 May	KLM
02 May - 10 May	KLM
04 May - 12 May	KLM
06 May - 14 May	Lufthansa
03 May - 11 May	Air Canada
05 May - 13 May	Lufthansa
07 May - 15 May	British Airways
08 May - 16 May	Air Canada
10 May - 18 May	Air Canada
09 May - 17 May	British Airways
25 May - 02 Jun	Finnair
27 May - 04 Jun	SWISS
26 May - 03 Jun	British Airways
24 May - 01 Jun	British Airways
31 May - 08 Jun	Air Canada
28 May - 05 Jun	British Airways
30 May - 07 Jun	Spirit Airlines
29 May - 06 Jun	Spirit Airlines

Also check the deals for one-way flights from Austin to Lisbon in May.

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 May from 402€

Return flights