Distance From Francisco de Sá Carneiro Airport to Ulaanbaatar Chinggis Khaan International Airport, OPO - UBN Distance

The distance from Francisco de Sá Carneiro Airport (OPO) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 5140 miles or 8271 kilometers or 4463 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 Porto ( Portugal ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Porto and Ulaanbaatar (Sergelen) takes around 11 hours 48 minutes.

Estimated flight time from Francisco de Sá Carneiro Airport, Porto, Portugal to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 11 hours 48 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 • OPO - UBN

Kilometers		8271 km
Statute Miles		5140 miles
Nautical Miles		4463 nm
Avg. Time of Flight		11 hours 48 minutes

Francisco de Sá Carneiro Airport to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - OPO to UBN Flight Path

Location of Francisco de Sá Carneiro Airport & Ulaanbaatar Chinggis Khaan International Airport is given below.
Click the map to view Porto to Ulaanbaatar (Sergelen) nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • OPO - UBN

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

Location	Local Time
Porto (Portugal)	2025-12-13, 22:43:39 WET
Ulaanbaatar (Sergelen) (Mongolia)	2025-12-14, 06:43:39 +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

Francisco de Sá Carneiro Airport (OPO / LPPR) Porto, Portugal

Destination

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