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

Return flights

03 Dec - 09 Dec	KLM
03 Dec - 10 Dec	KLM
29 Dec - 13 Jan	Delta
10 Dec - 14 Dec	Iberia
28 Dec - 09 Jan	Delta
08 Dec - 11 Dec	Spirit Airlines
09 Dec - 16 Dec	Aer Lingus
05 Dec - 12 Dec	Aer Lingus
07 Dec - 14 Dec	Aer Lingus
06 Dec - 27 Dec	United
05 Dec - 27 Dec	United
11 Dec - 18 Dec	Aer Lingus
31 Dec - 07 Jan	Aer Lingus
23 Dec - 01 Jan	Air France
21 Dec - 05 Jan	Delta
27 Dec - 03 Jan	jetBlue
27 Dec - 01 Jan	Frontier Airlines
24 Dec - 03 Jan	British Airways
25 Dec - 01 Jan	Aer Lingus
29 Dec - 05 Jan	Aer Lingus

Also check the deals for one-way flights from Phoenix 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 Phoenix to Dublin in December from $433

Return flights