AirHint found the following cheapest one-way flights from Tokyo (HND) to Seoul (ICN) in December 2025 (see full year).
One-Way flights
| 17 Dec | Skymark Airlines | ||
| 11 Dec | Air Do | ||
| 10 Dec | Peach | direct | |
| 17 Dec | Korean Air | direct | |
| 23 Dec | ANA | ||
| 24 Dec | Japan Airlines | ||
| 03 Dec | Peach | direct | |
| 09 Dec | Peach | direct | |
| 14 Dec | Peach | direct | |
| 04 Dec | ANA |
Also check the deals for return flights from Tokyo to Seoul in December.
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