AirHint found the following cheapest return flights from Washington (DCA) to Dublin (DUB) in September 2026 (see full year).
Return flights
| 08 Sep - 15 Sep | American Airlines | ||
| 07 Sep - 14 Sep | American Airlines | ||
| 22 Sep - 29 Sep | American Airlines | ||
| 18 Sep - 22 Sep | Iberia | ||
| 10 Sep - 14 Sep | Delta |
Also check the deals for one-way flights from Washington to Dublin in September.
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