Cheapest return flights from Austin to Porto in September from 473€

AirHint found the following cheapest return flights from Austin (AUS) to Porto (OPO) in September 2026 (see full year).

Return flights

22 Sep - 29 Sep Air Canada
23 Sep - 30 Sep Air Canada
29 Sep - 06 Oct Air Canada
28 Sep - 05 Oct Iberia
21 Sep - 28 Sep British Airways
24 Sep - 01 Oct Air Canada
17 Sep - 24 Sep United
18 Sep - 25 Sep Iberia
25 Sep - 02 Oct Iberia
27 Sep - 04 Oct Air Canada
20 Sep - 27 Sep Air Canada
19 Sep - 26 Sep Delta
26 Sep - 03 Oct Air Canada

Also check the deals for one-way flights from Austin to Porto in September.

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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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