AirHint found the following cheapest return flights from Philadelphia (PHL) to Seoul (ICN) in March 2026 (see full year).
Return flights
| 13 Mar - 06 Apr | Hawaiian Airlines | ||
| 18 Mar - 02 Apr | United | ||
| 29 Mar - 05 Apr | Delta | ||
| 14 Mar - 06 Apr | United | ||
| 31 Mar - 11 Apr | Air Canada | ||
| 28 Mar - 11 Apr | Air Canada | ||
| 07 Mar - 21 Mar | Korean Air |
Also check the deals for one-way flights from Philadelphia to Seoul in March.
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