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

Return flights

07 Dec - 13 Dec	Alaska Airlines
07 Dec - 22 Dec	Delta
07 Dec - 23 Dec	Delta
07 Dec - 26 Dec	Delta
07 Dec - 27 Dec	Delta
29 Dec - 14 Jan	United
07 Dec - 28 Dec	Delta
08 Dec - 28 Dec	Delta
26 Dec - 14 Jan	United
24 Dec - 13 Jan	WestJet
25 Dec - 13 Jan	Hawaiian Airlines
23 Dec - 15 Jan	Frontier Airlines
13 Dec - 20 Dec	WestJet
22 Dec - 13 Jan	Hawaiian Airlines
23 Dec - 13 Jan	Frontier Airlines
15 Dec - 09 Jan	Frontier Airlines
23 Dec - 30 Dec	Hawaiian Airlines
24 Dec - 07 Jan	WestJet
21 Dec - 13 Jan	Alaska Airlines
17 Dec - 24 Dec	United

Also check the deals for one-way flights from Phoenix to Seoul 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 Seoul in December from 680€

Return flights