Distance From Harvey Point Defense Testing Activity Airport to Sofia Airport

The distance from Harvey Point Defense Testing Activity Airport () to Sofia Airport (SOF) is 5016 miles or 8073 kilometers or 4356 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.

---

How long does it take to travel from Hertford ( United States ) to Sofia ( Bulgaria )?

A one-way nonstop (direct) flight between Hertford and Sofia takes around 11 hours 31 minutes.

Estimated flight time from Harvey Point Defense Testing Activity Airport, Hertford, United States to Sofia Airport, Sofia, Bulgaria is 11 hours 31 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		8073 km
Statute Miles		5016 miles
Nautical Miles		4356 nm
Avg. Time of Flight		11 hours 31 minutes

Harvey Point Defense Testing Activity Airport to Sofia Airport Flight Route Map - to SOF Flight Path

Location of Harvey Point Defense Testing Activity Airport & Sofia Airport is given below.
Click the map to view Hertford to Sofia nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • - SOF

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

Location	Local Time
Hertford (United States)	2026-06-18, 13:09:53 EDT
Sofia (Bulgaria)	2026-06-18, 20:09:53 EEST

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

Harvey Point Defense Testing Activity Airport ( / NC01) Hertford, United States

Destination

Sofia Airport (SOF / LBSF) Sofia, Bulgaria