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

Return flights

04 Dec - 21 Dec	American Airlines
09 Dec - 15 Jan	Air Canada
04 Dec - 29 Dec	United
08 Dec - 29 Dec	United
25 Dec - 29 Dec	Hawaiian Airlines
23 Dec - 11 Jan	Frontier Airlines
23 Dec - 08 Jan	WestJet
13 Dec - 20 Dec	WestJet
26 Dec - 09 Jan	Air Canada
12 Dec - 19 Dec	WestJet
15 Dec - 09 Jan	Frontier Airlines
10 Dec - 08 Jan	Air Canada
10 Dec - 07 Jan	Air Canada
12 Dec - 08 Jan	Air Canada
10 Dec - 06 Jan	Frontier Airlines
17 Dec - 24 Dec	WestJet
16 Dec - 30 Dec	United
12 Dec - 09 Jan	Air Canada
17 Dec - 28 Dec	United
18 Dec - 28 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 $799

Return flights