AirHint found the following cheapest one-way flights from Seoul (GMP) to Ulaanbaatar (UBN) in April 2026 (see full year).
One-Way flights
| 28 Apr | Korean Air | ||
| 29 Apr | Air Seoul, Inc | ||
| 21 Apr | Asiana Airlines | ||
| 05 Apr | Asiana Airlines | ||
| 03 Apr | Jeju Air | ||
| 02 Apr | Asiana Airlines | ||
| 09 Apr | Asiana Airlines | ||
| 10 Apr | Jeju Air | ||
| 01 Apr | Air China | ||
| 04 Apr | Air China |
Also check the deals for return flights from Seoul to Ulaanbaatar in April.
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