Cheapest return GMP–UBN flights, May

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

Return flights

07 May - 14 May T'way Air
20 May - 28 May Air Busan
20 May - 29 May Air Busan
07 May - 11 May T'way Air
21 May - 28 May Air Busan
08 May - 15 May Air Busan
14 May - 18 May T'way Air
12 May - 15 May Korean Air
13 May - 15 May Air Busan
17 May - 24 May T'way Air
28 May - 01 Jun T'way Air
15 May - 13 Jun Air China
31 May - 03 Jun Air China
31 May - 12 Jun Air China
31 May - 04 Jun Air China
31 May - 05 Jun Air China
24 May - 04 Jun Air China

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

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