Distance From Ashford Field to Ulaanbaatar Chinggis Khaan International Airport

The distance from Ashford Field () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 6687 miles or 10761 kilometers or 5807 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 Old Boston ( United States ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Old Boston and Ulaanbaatar (Sergelen) takes around 15 hours 22 minutes.

Estimated flight time from Ashford Field, Old Boston, United States to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 15 hours 22 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		10761 km
Statute Miles		6687 miles
Nautical Miles		5807 nm
Avg. Time of Flight		15 hours 22 minutes

Ashford Field to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

Location of Ashford Field & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Old Boston to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • - UBN

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

Location	Local Time
Old Boston (United States)	2026-03-17, 15:29:40 EDT
Ulaanbaatar (Sergelen) (Mongolia)	2026-03-18, 03:29:40 +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

Ashford Field ( / 7TX9) Old Boston, United States

Destination

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