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

Return flights

05 Dec - 08 Dec	Alaska Airlines
05 Dec - 09 Dec	Alaska Airlines
03 Dec - 10 Dec	Hawaiian Airlines
01 Dec - 04 Dec	Delta
04 Dec - 09 Dec	Delta
08 Dec - 21 Dec	Frontier Airlines
09 Dec - 21 Dec	Hawaiian Airlines
08 Dec - 18 Dec	United
08 Dec - 14 Dec	United
11 Dec - 13 Jan	United
12 Dec - 14 Jan	Frontier Airlines
10 Dec - 12 Jan	United
15 Dec - 22 Dec	United
10 Dec - 06 Jan	WestJet
12 Dec - 12 Jan	Frontier Airlines
15 Dec - 09 Jan	Frontier Airlines
22 Dec - 06 Jan	Frontier Airlines
27 Dec - 07 Jan	Delta
12 Dec - 11 Jan	Delta
20 Dec - 10 Jan	Frontier Airlines

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 678€

Return flights