Distance From Joe Williams Naval Outlying Field to Sofia Airport

The distance from Joe Williams Naval Outlying Field () to Sofia Airport (SOF) is 5689 miles or 9155 kilometers or 4940 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 Preston ( United States ) to Sofia ( Bulgaria )?

A one-way nonstop (direct) flight between Preston and Sofia takes around 13 hours 4 minutes.

Estimated flight time from Joe Williams Naval Outlying Field, Preston, United States to Sofia Airport, Sofia, Bulgaria is 13 hours 4 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		9155 km
Statute Miles		5689 miles
Nautical Miles		4940 nm
Avg. Time of Flight		13 hours 4 minutes

Joe Williams Naval Outlying Field to Sofia Airport Flight Route Map - to SOF Flight Path

Location of Joe Williams Naval Outlying Field & Sofia Airport is given below.
Click the map to view Preston to Sofia nonstop flight path and travel direction.

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

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

Time Difference Between the Airports • - SOF

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

Location	Local Time
Preston (United States)	2026-03-17, 07:12:16 EDT
Sofia (Bulgaria)	2026-03-17, 13:12:16 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

Joe Williams Naval Outlying Field ( / KNJW) Preston, United States

Destination

Sofia Airport (SOF / LBSF) Sofia, Bulgaria