AirHint found the following cheapest one-way flights from Philadelphia (PHL) to Seoul (ICN) in December 2025 (see full year).
One-Way flights
| 13 Dec | Air Canada | ||
| 29 Dec | United | ||
| 09 Dec | Delta | ||
| 11 Dec | United | ||
| 10 Dec | United | ||
| 14 Dec | United | ||
| 16 Dec | Delta | ||
| 21 Dec | Delta |
Also check the deals for return flights from Philadelphia to Seoul in December.
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