Distance From Ol Seki Airstrip to Ulaanbaatar Chinggis Khaan International Airport, OSJ - UBN Distance

The distance from Ol Seki Airstrip (OSJ) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 5435 miles or 8747 kilometers or 4720 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from ( Kenya ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between and Ulaanbaatar (Sergelen) takes around 12 hours 29 minutes.

Estimated flight time from Ol Seki Airstrip, , Kenya to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 12 hours 29 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • OSJ - UBN

Kilometers		8747 km
Statute Miles		5435 miles
Nautical Miles		4720 nm
Avg. Time of Flight		12 hours 29 minutes

Ol Seki Airstrip to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - OSJ to UBN Flight Path

Location of Ol Seki Airstrip & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

Click to see flight route on Google Map between , Kenya and Ulaanbaatar (Sergelen), Mongolia. .

Nonstop flight route between , Kenya and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • OSJ - UBN

Time difference between (Kenya) and Ulaanbaatar (Sergelen) (Mongolia) is 5 Hours.
Ulaanbaatar (Sergelen) time is 5 Hours ahead of .

Location	Local Time
(Kenya)	2025-12-14, 12:28:25 EAT
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-14, 17:28:25 +08

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Ol Seki Airstrip (OSJ / ) , Kenya

Destination

Ulaanbaatar Chinggis Khaan International Airport (UBN / ZMCK) Ulaanbaatar (Sergelen), Mongolia