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NXX to SOF: distance & flight time
Willow Grove (Willow Grove Naval Air Station/Joint Reserve Base) → Sofia (Sofia Airport)
4,785 mi
7,701 km · 4,158 nm
9h 51m
estimated nonstop flight time
+7h
time difference · heading northeast
See live NXX→SOF fares Phone-only fares on this route — call free
Flight time details
4,785 miles nonstop takes roughly 9h 51m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- NXX — Willow Grove Naval Air Station/Joint Reserve Base · Willow Grove, United States
- SOF — Sofia Airport · Sofia, Bulgaria
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near NXX
- PHL · Philadelphia International Airport23 mi away
- BBX · Wings Field8 mi away
- DYL · Doylestown Airport9 mi away
- PNE · Northeast Philadelphia Airport11 mi away
Near SOF
- PDV · Plovdiv International Airport85 mi away
- INI · Nis Airport90 mi away
- SKP · Skopje Alexander the Great Airport105 mi away
- CRA · Craiova Airport115 mi away
Frequently asked questions
How far is NXX from SOF?
The flight distance from Willow Grove (NXX) to Sofia (SOF) is 4,785 miles (7,701 km, 4,158 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from NXX to SOF?
A nonstop flight takes about 9h 51m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from NXX to SOF?
Nonstop service on NXX–SOF depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 9h 51m nonstop estimate.
What is the time difference between Willow Grove and Sofia?
Sofia is 7 hours ahead of Willow Grove.
What is the cheapest way to fly from NXX to SOF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on NXX–SOF that never appear on search engines, with no booking fees.
Why are some NXX to SOF fares phone-only?
Consolidator contracts let us sell certain NXX–SOF tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.