Distance From Grefrath-Niershorst Airport to Ulaanbaatar Chinggis Khaan International Airport

The distance from Grefrath-Niershorst Airport () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 4143 miles or 6667 kilometers or 3598 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 Grefrath ( Germany ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Grefrath and Ulaanbaatar (Sergelen) takes around 9 hours 31 minutes.

Estimated flight time from Grefrath-Niershorst Airport, Grefrath, Germany to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 9 hours 31 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 • - UBN

Kilometers		6667 km
Statute Miles		4143 miles
Nautical Miles		3598 nm
Avg. Time of Flight		9 hours 31 minutes

Grefrath-Niershorst Airport to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

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

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

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

Time Difference Between the Airports • - UBN

Time difference between Grefrath (Germany) and Ulaanbaatar (Sergelen) (Mongolia) is 7 Hours.
Ulaanbaatar (Sergelen) time is 7 Hours ahead of Grefrath.

Location	Local Time
Grefrath (Germany)	2026-03-18, 09:03:36 CET
Ulaanbaatar (Sergelen) (Mongolia)	2026-03-18, 16:03:36 +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

Grefrath-Niershorst Airport ( / EDLF) Grefrath, Germany

Destination

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