AirHint found the following cheapest return flights from Seoul (ICN) to Ulaanbaatar (UBN)
in September 2025 (see full year ).
Return flights
07 Sep
- 13 Sep
Jeju Air
$ 262
direct
01 Sep
- 05 Sep
T'way Air
$ 268
direct
23 Sep
- 21 Oct
Jeju Air
$ 271
direct
21 Sep
- 25 Sep
Jeju Air
$ 272
direct
08 Sep
- 14 Sep
Jeju Air
$ 272
direct
01 Sep
- 07 Sep
Jeju Air
$ 272
direct
13 Sep
- 18 Sep
Jeju Air
$ 276
direct
14 Sep
- 17 Sep
T'way Air
$ 281
direct
22 Sep
- 26 Sep
T'way Air
$ 281
direct
15 Sep
- 19 Sep
T'way Air
$ 282
direct
07 Sep
- 10 Sep
T'way Air
$ 282
direct
28 Sep
- 01 Oct
Korean Air
$ 402
direct
24 Sep
- 03 Oct
Korean Air
$ 402
direct
29 Sep
- 05 Oct
Korean Air
$ 402
direct
28 Sep
- 06 Oct
Korean Air
$ 402
direct
23 Sep
- 03 Oct
Korean Air
$ 403
direct
22 Sep
- 20 Oct
Korean Air
$ 412
direct
26 Sep
- 12 Oct
Korean Air
$ 485
direct
30 Sep
- 06 Oct
Air China
$ 884
30 Sep
- 04 Oct
Air China
$ 884
Also check the deals for one-way flights from Seoul to Ulaanbaatar in September .
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.