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
12 Dec - 16 Dec	Lufthansa
11 Dec - 14 Dec	KLM
12 Dec - 23 Dec	Delta
28 Dec - 09 Jan	Delta
09 Dec - 16 Dec	Aer Lingus
05 Dec - 12 Dec	Aer Lingus
07 Dec - 14 Dec	jetBlue
13 Dec - 20 Dec	Lufthansa
29 Dec - 05 Jan	Lufthansa
12 Dec - 19 Dec	Sun Country Airlines
17 Dec - 11 Jan	United
18 Dec - 11 Jan	KLM
14 Dec - 19 Dec	Frontier Airlines
27 Dec - 06 Jan	WestJet
31 Dec - 07 Jan	Aer Lingus
14 Dec - 03 Jan	Frontier Airlines
29 Dec - 03 Jan	Frontier Airlines
26 Dec - 01 Jan	WestJet
28 Dec - 01 Jan	Frontier Airlines

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 365€

Return flights