AirHint found the following cheapest one-way flights from Seoul (ICN) to Ulaanbaatar (UBN) in April 2026 (see full year).
One-Way flights
| 26 Apr | Jeju Air | direct | |
| 07 Apr | Jeju Air | direct | |
| 28 Apr | Jeju Air | direct | |
| 14 Apr | Jeju Air | direct | |
| 25 Apr | Korean Air | direct | |
| 22 Apr | Asiana Airlines | direct | |
| 27 Apr | Asiana Airlines | direct |
Also check the deals for return flights from Seoul to Ulaanbaatar in April.
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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
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