Distance From Aerodromo de Castelo Branco to Ulaanbaatar Chinggis Khaan International Airport

The distance from Aerodromo de Castelo Branco () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 5173 miles or 8325 kilometers or 4493 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 Castelo Branco ( Portugal ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Castelo Branco and Ulaanbaatar (Sergelen) takes around 11 hours 53 minutes.

Estimated flight time from Aerodromo de Castelo Branco, Castelo Branco, Portugal to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 11 hours 53 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		8325 km
Statute Miles		5173 miles
Nautical Miles		4493 nm
Avg. Time of Flight		11 hours 53 minutes

Aerodromo de Castelo Branco to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

Location of Aerodromo de Castelo Branco & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Castelo Branco to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

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

Nonstop flight route between Castelo Branco, Portugal and Ulaanbaatar (Sergelen), Mongolia.

Time Difference Between the Airports • - UBN

Time difference between Castelo Branco (Portugal) and Ulaanbaatar (Sergelen) (Mongolia) is 7 Hours.
Ulaanbaatar (Sergelen) time is 7 Hours ahead of Castelo Branco.

Location	Local Time
Castelo Branco (Portugal)	2026-05-01, 13:29:58 WEST
Ulaanbaatar (Sergelen) (Mongolia)	2026-05-01, 20:29:58 +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

Aerodromo de Castelo Branco ( / LPCB) Castelo Branco, Portugal

Destination

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