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

Return flights

01 Dec - 11 Dec	Air Canada
12 Dec - 24 Dec	WestJet
22 Dec - 29 Dec	WestJet
17 Dec - 29 Dec	WestJet
17 Dec - 24 Dec	WestJet
19 Dec - 08 Jan	WestJet
21 Dec - 04 Jan	WestJet
19 Dec - 11 Jan	WestJet
16 Dec - 02 Jan	Air Canada
17 Dec - 04 Jan	Air Canada
17 Dec - 03 Jan	China 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 $760

Return flights