Distance From Blue Knob Valley Airport to Sofia Airport

The distance from Blue Knob Valley Airport () to Sofia Airport (SOF) is 4911 miles or 7903 kilometers or 4265 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 Duncansville ( United States ) to Sofia ( Bulgaria )?

A one-way nonstop (direct) flight between Duncansville and Sofia takes around 11 hours 17 minutes.

Estimated flight time from Blue Knob Valley Airport, Duncansville, United States to Sofia Airport, Sofia, Bulgaria is 11 hours 17 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		7903 km
Statute Miles		4911 miles
Nautical Miles		4265 nm
Avg. Time of Flight		11 hours 17 minutes

Blue Knob Valley Airport to Sofia Airport Flight Route Map - to SOF Flight Path

Location of Blue Knob Valley Airport & Sofia Airport is given below.
Click the map to view Duncansville to Sofia nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • - SOF

Time difference between Duncansville (United States) and Sofia (Bulgaria) is 6 Hours.
Sofia time is 6 Hours ahead of Duncansville.

Location	Local Time
Duncansville (United States)	2026-03-20, 15:42:42 EDT
Sofia (Bulgaria)	2026-03-20, 21:42:42 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

Blue Knob Valley Airport ( / 7PN4) Duncansville, United States

Destination

Sofia Airport (SOF / LBSF) Sofia, Bulgaria