AirHint found the following cheapest return flights from Philadelphia (PHL) to Seoul (ICN) in November 2025 (see full year).
Return flights
| 23 Nov - 08 Dec | Air Canada | ||
| 21 Nov - 01 Dec | Air Canada | ||
| 11 Nov - 18 Nov | United | ||
| 08 Nov - 22 Nov | Delta |
Also check the deals for one-way flights from Philadelphia to Seoul in November.
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