Cheapest return flights from Seoul to Ulaanbaatar in May from $138

Best time to book flights for Seoul (ICN) to Ulaanbaatar (UBN) flights at AirHint

AirHint found the following cheapest return flights from Seoul (ICN) to Ulaanbaatar (UBN) in May 2025 (see full year).

Return flights

13 May - 15 May Jeju Air direct
18 May - 20 May Jeju Air direct
13 May - 20 May Jeju Air direct
11 May - 15 May Jeju Air direct
11 May - 20 May Jeju Air direct
13 May - 18 May Jeju Air direct
18 May - 29 May Jeju Air direct
25 May - 27 May Jeju Air direct
25 May - 01 Jun Jeju Air direct
25 May - 29 May Jeju Air direct
18 May - 22 May Jeju Air direct
25 May - 05 Jun Jeju Air direct
27 May - 03 Jun Jeju Air direct
29 May - 02 Jun Jeju Air direct
27 May - 01 Jun Jeju Air direct
22 May - 01 Jun Jeju Air direct
29 May - 01 Jun Jeju Air direct
29 May - 05 Jun Jeju Air direct
29 May - 03 Jun Jeju Air direct
29 May - 08 Jun Jeju Air direct

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

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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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