Distance From Hollis Clark Bay Seaplane Base to Ulaanbaatar Chinggis Khaan International Airport, HYL - UBN Distance

The distance from Hollis Clark Bay Seaplane Base (HYL) to Ulaanbaatar Chinggis Khaan International Airport (UBN) is 4525 miles or 7282 kilometers or 3929 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 Hollis ( United States ) to Ulaanbaatar (Sergelen) ( Mongolia )?

A one-way nonstop (direct) flight between Hollis and Ulaanbaatar (Sergelen) takes around 10 hours 24 minutes.

Estimated flight time from Hollis Clark Bay Seaplane Base, Hollis, United States to Ulaanbaatar Chinggis Khaan International Airport, Ulaanbaatar (Sergelen), Mongolia is 10 hours 24 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 • HYL - UBN

Kilometers		7282 km
Statute Miles		4525 miles
Nautical Miles		3929 nm
Avg. Time of Flight		10 hours 24 minutes

Hollis Clark Bay Seaplane Base to Ulaanbaatar Chinggis Khaan International Airport Flight Route Map - HYL to UBN Flight Path

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

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

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

Time Difference Between the Airports • HYL - UBN

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

Location	Local Time
Hollis (United States)	2026-05-07, 05:38:45 AKDT
Ulaanbaatar (Sergelen) (Mongolia)	2026-05-07, 21:38:45 +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

Hollis Clark Bay Seaplane Base (HYL / HYL) Hollis, United States

Destination

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