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Cheapest one-way flights from Washington (IAD) to Dublin (DUB), September

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Dates, airline, and price
Dates	Airline	Price
29 Sep	Icelandair
23 Sep	Icelandair
22 Sep	Icelandair
10 Sep	Frontier Airlines
11 Sep	Air Canada
03 Sep	Porter Airlines (Canada) Ltd
15 Sep	Icelandair
10 Sep	Lufthansa Direct Flight
11 Sep	Lufthansa Direct Flight
16 Sep	United Direct Flight

deals for return flights from Washington to Dublin in September.

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Updated Jul 13, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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Cheapest one-way flights from Washington (IAD) to Dublin (DUB), September

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