Cheapest return flights from Houston to Lisbon in September from $633

Best time to book flights for Houston (IAH) to Lisbon (LIS) flights at AirHint

AirHint found the following cheapest return flights from Houston (IAH) to Lisbon (LIS) in September 2025 (see full year).

Return flights

21 Sep - 26 Sep Spirit Airlines
11 Sep - 18 Sep Spirit Airlines
08 Sep - 15 Sep Spirit Airlines
03 Sep - 10 Sep Spirit Airlines
03 Sep - 14 Sep Spirit Airlines
05 Sep - 07 Sep Spirit Airlines
06 Sep - 13 Sep Spirit Airlines
07 Sep - 13 Sep Spirit Airlines
21 Sep - 01 Oct Air Canada
20 Sep - 30 Sep Air Canada
12 Sep - 19 Sep Air Canada
26 Sep - 03 Oct Spirit Airlines
27 Sep - 04 Oct Spirit Airlines

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