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FSI to SOF: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Sofia (Sofia Airport)
5,954 mi
9,581 km · 5,174 nm
12h 8m
estimated nonstop flight time
+8h
time difference · heading northeast
See live FSI→SOF fares Phone-only fares on this route — call free
Flight time details
5,954 miles nonstop takes roughly 12h 8m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 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 FSI from SOF?
The flight distance from Fort Sill (FSI) to Sofia (SOF) is 5,954 miles (9,581 km, 5,174 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to SOF?
A nonstop flight takes about 12h 8m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Fort Sill and Sofia?
Sofia is 8 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to SOF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–SOF that never appear on search engines, with no booking fees.