AirHint found the following cheapest return flights from Austin (AUS) to Dublin (DUB) in December 2025 (see full year).

Return flights

02 Dec - 09 Dec	Air France
07 Dec - 16 Dec	Air France
09 Dec - 16 Dec	Air France
02 Dec - 14 Dec	Air France
04 Dec - 11 Dec	Aer Lingus
10 Dec - 17 Dec	Aer Lingus
16 Dec - 23 Dec	Aer Lingus
29 Dec - 06 Jan	United
27 Dec - 05 Jan	Delta
18 Dec - 10 Jan	Air France
21 Dec - 10 Jan	Frontier Airlines
12 Dec - 19 Dec	Aer Lingus
19 Dec - 10 Jan	Spirit Airlines
20 Dec - 10 Jan	Frontier Airlines
26 Dec - 05 Jan	Spirit Airlines
09 Dec - 03 Jan	Spirit Airlines
23 Dec - 31 Dec	Delta
24 Dec - 01 Jan	Spirit Airlines
22 Dec - 29 Dec	Delta
20 Dec - 01 Jan	Air France

Also check the deals for one-way flights from Austin to Dublin in December.

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 Austin to Dublin in December from 372€

Return flights