AirHint found the following cheapest return flights from Houston (IAH) to Dublin (DUB) in May 2026 (see full year).

Return flights

05 May - 13 May	United
05 May - 12 May	United
06 May - 13 May	Finnair
04 May - 12 May	Finnair
03 May - 11 May	British Airways
09 May - 16 May	Spirit Airlines
12 May - 20 May	Spirit Airlines
06 May - 14 May	Finnair
11 May - 19 May	Finnair
10 May - 18 May	British Airways
31 May - 08 Jun	British Airways
24 May - 01 Jun	British Airways
31 May - 07 Jun	Air Canada
23 May - 06 Jun	Air Canada
27 May - 25 Jun	Air Canada

Also check the deals for one-way flights from Houston to Dublin in May.

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 May from $527

Return flights