Cheapest return flights from Philadelphia to Seoul in December from $796

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

Return flights

03 Dec - 13 Dec Frontier Airlines
02 Dec - 21 Dec American Airlines
10 Dec - 27 Dec Air Canada
24 Dec - 18 Jan Delta
24 Dec - 31 Dec Delta
25 Dec - 11 Jan Air Canada
26 Dec - 10 Jan Frontier Airlines
23 Dec - 30 Dec Spirit Airlines
25 Dec - 08 Jan United
25 Dec - 09 Jan United
12 Dec - 17 Dec United
24 Dec - 10 Jan Delta
25 Dec - 10 Jan United
21 Dec - 07 Jan Frontier Airlines
16 Dec - 11 Jan Delta
11 Dec - 03 Jan WestJet

Also check the deals for one-way flights from Philadelphia to Seoul in December.

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