Cheapest return ICN–UBN flights, May

AirHint found the following cheapest return flights from Seoul (ICN) to Ulaanbaatar (UBN) in May 2026 (see full year).

Return flights

29 May - 01 Jun Korean Air direct
31 May - 02 Jun Jeju Air direct
26 May - 31 May Jeju Air direct
30 May - 05 Jun Korean Air direct
29 May - 08 Jun Korean Air direct
26 May - 28 May Jeju Air direct
28 May - 31 May Jeju Air direct
29 May - 03 Jun Korean Air direct
30 May - 04 Jun Korean Air direct
31 May - 04 Jun Korean Air direct
31 May - 05 Jun Korean Air direct
30 May - 02 Jun Korean Air direct
29 May - 04 Jun Korean Air direct
24 May - 30 May Korean Air direct
24 May - 28 May Air China
25 May - 30 May Korean Air direct
25 May - 27 May Air China
24 May - 27 May Air China
22 May - 30 May MIAT Mongolian Airlines direct
24 May - 28 May Korean Air direct

Also check the deals for one-way flights from Seoul to Ulaanbaatar in May.

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