Distance From Big Bear City Airport to Ulaanbaatar Chinggis Khaan International Airport, RBF - UBN Distance

The distance from Big Bear City Airport (RBF) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 6166 miles or 9922 kilometers or 5354 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 Big Bear ( United States ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Big Bear and Ulaanbaatar (Sergelen) takes around 14 hours 10 minutes.

Estimated flight time from Big Bear City Airport, Big Bear, United States to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 14 hours 10 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 • RBF - UBN

Kilometers		9922 km
Statute Miles		6166 miles
Nautical Miles		5354 nm
Avg. Time of Flight		14 hours 10 minutes

Big Bear City Airport to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - RBF to UBN Flight Path

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

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

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

Time Difference Between the Airports • RBF - UBN

Time difference between Big Bear (United States) and Ulaanbaatar (Sergelen) (Mongolia) is 16 Hours.
Ulaanbaatar (Sergelen) time is 16 Hours ahead of Big Bear.

Location	Local Time
Big Bear (United States)	2025-12-15, 17:40:29 PST
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-16, 09:40:29 +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

Big Bear City Airport (RBF / L35) Big Bear, United States

Destination

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