AirHint found the following cheapest return flights from Houston (HOU) to Dublin (DUB) in September 2025 (see full year).

Return flights

08 Sep - 15 Sep	Spirit Airlines
09 Sep - 16 Sep	Spirit Airlines
26 Sep - 04 Oct	Spirit Airlines
13 Sep - 20 Sep	Spirit Airlines
12 Sep - 19 Sep	Spirit Airlines
02 Sep - 09 Sep	Frontier Airlines
06 Sep - 13 Sep	Spirit Airlines
07 Sep - 14 Sep	Spirit Airlines

Also check the deals for one-way flights from Houston to Dublin 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 Dublin in September from $568

Return flights