Cheapest return flights from Houston to Lisbon in September from $663

AirHint found the following cheapest return flights from Houston (IAH) to Lisbon (LIS) in September 2026 (see full year).

Return flights

16 Sep - 23 Sep Turkish Airlines
18 Sep - 25 Sep Air France
13 Sep - 20 Sep Turkish Airlines
08 Sep - 15 Sep Turkish Airlines
07 Sep - 14 Sep Turkish Airlines
05 Sep - 12 Sep Turkish Airlines
06 Sep - 13 Sep Air France

Also check the deals for one-way flights from Houston to Lisbon in September.

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