Cheapest return IAH–MAD flights, September

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

Return flights

29 Sep - 07 Oct United
22 Sep - 29 Sep United
21 Sep - 05 Oct Air France
30 Sep - 09 Oct Air France
23 Sep - 07 Oct United
23 Sep - 02 Oct United
30 Sep - 19 Oct Air France
07 Sep - 15 Sep British Airways
24 Sep - 01 Oct United
30 Sep - 04 Oct Air Canada
05 Sep - 17 Sep Air Canada
09 Sep - 26 Sep Iberia
10 Sep - 20 Sep Iberia
23 Sep - 26 Sep Turkish Airlines

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

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