Distance From Montgomery County Airpark to Ulaanbaatar Chinggis Khaan International Airport, GAI - UBN Distance

The distance from Montgomery County Airpark (GAI) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 6434 miles or 10354 kilometers or 5587 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.

---

How long does it take to travel from Gaithersburg ( United States ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Gaithersburg and Ulaanbaatar (Sergelen) takes around 14 hours 47 minutes.

Estimated flight time from Montgomery County Airpark, Gaithersburg, United States to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 14 hours 47 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 • GAI - UBN

Kilometers		10354 km
Statute Miles		6434 miles
Nautical Miles		5587 nm
Avg. Time of Flight		14 hours 47 minutes

Montgomery County Airpark to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - GAI to UBN Flight Path

Location of Montgomery County Airpark & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Gaithersburg to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

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

Nonstop flight route between Gaithersburg, United States and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • GAI - UBN

Time difference between Gaithersburg (United States) and Ulaanbaatar (Sergelen) (Mongolia) is 12 Hours.
Ulaanbaatar (Sergelen) time is 12 Hours ahead of Gaithersburg.

Location	Local Time
Gaithersburg (United States)	2026-06-14, 16:53:02 EDT
Ulaanbaatar (Sergelen) (Mongolia)	2026-06-15, 04:53:02 +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

Montgomery County Airpark (GAI / KGAI) Gaithersburg, United States

Destination

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