AirHint found the following cheapest return flights from St. Louis (STL) to Dublin (DUB) in August 2025 (see full year).

Return flights

13 Aug - 20 Aug	Air Canada
12 Aug - 19 Aug	Iberia
13 Aug - 19 Aug	Delta
13 Aug - 18 Aug	Air Canada
03 Aug - 16 Aug	Air Canada
20 Aug - 27 Aug	Delta
05 Aug - 12 Aug	United
15 Aug - 23 Aug	Air Canada
07 Aug - 14 Aug	United
23 Aug - 30 Aug	United
29 Aug - 13 Sep	Air Canada
25 Aug - 01 Sep	United
30 Aug - 06 Sep	United
27 Aug - 03 Sep	Aer Lingus

Also check the deals for one-way flights from St. Louis to Dublin in August.

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 St. Louis to Dublin in August from $396

Return flights