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

Return flights

20 Sep - 25 Sep	Spirit Airlines
25 Sep - 01 Oct	Spirit Airlines
20 Sep - 03 Oct	Spirit Airlines
08 Sep - 17 Sep	Spirit Airlines
21 Sep - 03 Oct	Spirit Airlines
23 Sep - 30 Sep	Spirit Airlines
11 Sep - 16 Sep	Spirit Airlines
10 Sep - 17 Sep	Spirit Airlines
16 Sep - 28 Sep	Spirit Airlines
09 Sep - 20 Sep	Spirit Airlines
13 Sep - 20 Sep	Spirit Airlines
30 Sep - 06 Oct	United
05 Sep - 11 Sep	Air Canada

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

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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Cheapest return flights from Houston to Barcelona in September from $436

Return flights