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

Return flights

05 Dec - 27 Dec	Finnair
02 Dec - 09 Dec	Aer Lingus
31 Dec - 07 Jan	Aer Lingus
16 Dec - 23 Dec	Aer Lingus
27 Dec - 17 Jan	Aer Lingus
05 Dec - 12 Dec	Aer Lingus
11 Dec - 18 Dec	Aer Lingus
28 Dec - 02 Jan	Scandinavian Airlines
15 Dec - 28 Dec	British Airways
21 Dec - 29 Dec	Spirit Airlines
18 Dec - 10 Jan	WestJet
18 Dec - 31 Dec	jetBlue
15 Dec - 28 Dec	Delta	direct
22 Dec - 02 Jan	Frontier Airlines
19 Dec - 02 Jan	Spirit Airlines
21 Dec - 28 Dec	Aer Lingus
23 Dec - 03 Jan	Air France
28 Dec - 02 Jan	Air France	direct

Also check the deals for one-way flights from Atlanta 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 Atlanta to Dublin in December from $655

Return flights