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

Return flights

23 Sep - 30 Sep	Air Canada
16 Sep - 24 Sep	Air Canada
15 Sep - 23 Sep	Air Canada
14 Sep - 22 Sep	Air Canada
09 Sep - 17 Sep	Air Canada
01 Sep - 30 Sep	United
13 Sep - 21 Sep	British Airways
01 Sep - 17 Sep	Air Canada
17 Sep - 25 Sep	British Airways
10 Sep - 18 Sep	Air Canada
26 Sep - 03 Oct	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 440€

Return flights