Cheap flights from Seoul to Ulaanbaatar from $327 GMP, ICN → UBN

Found recently, and the cheapest we hold

What have prices looked like?

Over 49 days, 24 Sept to 11 Nov, the cheapest return we saw each day was $270 to $379.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

No. We hold 12-night return fares on 2 other departure dates within 3 days of 12 Jan 2027, and none is cheaper.

Every date we hold

408 fares on 25 departure dates

Which month looks cheapest?

December 2026 is the cheapest month — from $325.

Found recently, and the cheapest we hold

It is also the cheapest one-way we hold, of any age.

What have prices looked like?

Over 37 days, 24 Sept to 11 Nov, the cheapest one-way we saw each day was $198 to $359.

Those were the prices on those days, not today's.

Could nearby dates be cheaper?

We hold no other one-way fares leaving within 3 days of 8 Jul 2027 to compare.

Every date we hold

11 fares on 1 departure dates

Return

Fares 30 to 59 days before departure were typically 28% lower than 0 to 6 days before departure.

From the cheapest return each day between 24 Sept and 11 Nov (49 days), grouped by how many days ahead the flight left; one adult in economy.

Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.

Prices reflect recent searches — current fares may differ.

One-way

Not enough history yet: in 37 days of one-way prices, 24 Sept to 11 Nov, fewer than 3 booking ranges had prices on 7 days or more.

How much is a return flight from Seoul to Ulaanbaatar?

The cheapest return found recently is $373 with Jeju Air, 12 Jan 2027 to 24 Jan 2027, found 2 days ago. The cheapest return we hold, of any age, is $325 with Jeju Air, 8 Dec to 10 Dec, found 6 days ago. The cheapest return fare on each of 25 departure dates is usually $403 to $432.

How much is a one-way flight from Seoul to Ulaanbaatar?

The cheapest one-way found recently is $327 with MIAT Mongolian Airlines, 8 Jul 2027, found 2 days ago.

What is the cheapest month to fly from Seoul to Ulaanbaatar?

December 2026 is the cheapest month for a return, from $325, 8 Dec to 10 Dec, found 6 days ago.

Every date in December 2026

How far ahead should I book a flight from Seoul to Ulaanbaatar?

In 49 days of prices between 24 Sept and 11 Nov, return fares 30 to 59 days before departure were typically 28% lower than 0 to 6 days before departure.

Is there a direct flight from Seoul to Ulaanbaatar?

Yes, the cheapest nonstop return found recently is $373 with Jeju Air, 12 Jan 2027 to 24 Jan 2027, found 2 days ago. The cheapest nonstop one-way found recently is $327 with MIAT Mongolian Airlines, 8 Jul 2027, found 2 days ago.

How long is the flight from Seoul to Ulaanbaatar?

The cheapest nonstop one-way found recently, with MIAT Mongolian Airlines on 8 Jul 2027, takes 3 h 40 min from Incheon International Airport (ICN) to Chinggis Khaan International Airport (UBN).

Which airlines have the cheapest flights from Seoul to Ulaanbaatar?

Between 19 Nov and 11 Jun 2027, MIAT Mongolian Airlines has the cheapest return on 7 of the 25 departure dates we hold, Jeju Air on 6 and Korean Air on 5.