Distance From Sintra Air Base to Ulaanbaatar Chinggis Khaan International Airport

The distance from Sintra Air Base () to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 5292 miles or 8516 kilometers or 4595 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 Sintra ( Portugal ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Sintra and Ulaanbaatar (Sergelen) takes around 12 hours 9 minutes.

Estimated flight time from Sintra Air Base, Sintra, Portugal to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 12 hours 9 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		8516 km
Statute Miles		5292 miles
Nautical Miles		4595 nm
Avg. Time of Flight		12 hours 9 minutes

Sintra Air Base to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - to UBN Flight Path

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

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

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

Time Difference Between the Airports • - UBN

Time difference between Sintra (Portugal) and Ulaanbaatar (Sergelen) (Mongolia) is 8 Hours.
Ulaanbaatar (Sergelen) time is 8 Hours ahead of Sintra.

Location	Local Time
Sintra (Portugal)	2025-12-14, 02:46:19 WET
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-14, 10:46:19 +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

Sintra Air Base ( / LPST) Sintra, Portugal

Destination

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