Distance From Rushmore Heliport to Sofia Airport

The distance from Rushmore Heliport () to Sofia Airport (SOF) is 5612 miles or 9032 kilometers or 4874 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 Keystone ( United States ) to Sofia ( Bulgaria )?

A one-way nonstop (direct) flight between Keystone and Sofia takes around 12 hours 54 minutes.

Estimated flight time from Rushmore Heliport, Keystone, United States to Sofia Airport, Sofia, Bulgaria is 12 hours 54 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 • - SOF

Kilometers		9032 km
Statute Miles		5612 miles
Nautical Miles		4874 nm
Avg. Time of Flight		12 hours 54 minutes

Rushmore Heliport to Sofia Airport Flight Route Map - to SOF Flight Path

Location of Rushmore Heliport & Sofia Airport is given below.
Click the map to view Keystone to Sofia nonstop flight path and travel direction.

Click to see flight route on Google Map between Keystone, United States and Sofia, Bulgaria. .

Nonstop flight route between Keystone, United States and Sofia, Bulgaria.

Time Difference Between the Airports • - SOF

Time difference between Keystone (United States) and Sofia (Bulgaria) is 7 Hours.
Sofia time is 7 Hours ahead of Keystone.

Location	Local Time
Keystone (United States)	2026-03-21, 17:38:32 CDT
Sofia (Bulgaria)	2026-03-22, 00:38:32 EET

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

Rushmore Heliport ( / ) Keystone, United States

Destination

Sofia Airport (SOF / LBSF) Sofia, Bulgaria