Cheapest return flights from Phoenix to Porto in September from $616

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

Return flights

17 Sep - 24 Sep Delta
16 Sep - 23 Sep KLM
25 Sep - 09 Oct British Airways
19 Sep - 26 Sep Lufthansa
18 Sep - 25 Sep Air France
09 Sep - 16 Sep United
15 Sep - 22 Sep United
10 Sep - 17 Sep Air Transat
11 Sep - 18 Sep United
12 Sep - 19 Sep Lufthansa

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

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