Cheapest return flights from Portland to Ljubljana in September from $920

AirHint found the following cheapest return flights from Portland (PDX) to Ljubljana (LJU) in September 2026 (see full year).

Return flights

19 Sep - 26 Sep British Airways
20 Sep - 27 Sep Air France
21 Sep - 28 Sep Icelandair

Also check the deals for one-way flights from Portland to Ljubljana in September.

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