Cheapest return flights from Philadelphia to Seoul in December from 658€

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 Air Canada
01 Dec - 08 Dec Air Canada
02 Dec - 09 Dec Air Canada
08 Dec - 15 Dec Air Canada
03 Dec - 27 Dec Air Canada
01 Dec - 27 Dec Delta
02 Dec - 21 Dec Delta
09 Dec - 16 Dec Alaska Airlines
08 Dec - 19 Dec United
10 Dec - 17 Dec United
24 Dec - 18 Jan Delta
26 Dec - 11 Jan Air Canada
25 Dec - 14 Jan United
26 Dec - 10 Jan Frontier Airlines
30 Dec - 06 Jan Frontier Airlines
24 Dec - 10 Jan Delta
16 Dec - 11 Jan Delta
15 Dec - 11 Jan Delta
11 Dec - 03 Jan WestJet
12 Dec - 03 Jan Frontier Airlines

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

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