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HLN to SOF: distance & flight time
Helena (Helena Regional Airport) → Sofia (Sofia Airport)
5,689 mi
9,156 km · 4,944 nm
11h 37m
estimated nonstop flight time
+9h
time difference · heading northeast
See live HLN→SOF fares Phone-only fares on this route — call free
Flight time details
5,689 miles nonstop takes roughly 11h 37m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- HLN — Helena Regional Airport · Helena, 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 HLN
- BTM · Bert Mooney Airport51 mi away
- GTF · Great Falls International Airport67 mi away
- BZN · Gallatin Field70 mi away
- LVM · Mission Field97 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 HLN from SOF?
The flight distance from Helena (HLN) to Sofia (SOF) is 5,689 miles (9,156 km, 4,944 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HLN to SOF?
A nonstop flight takes about 11h 37m 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 Helena and Sofia?
Sofia is 9 hours ahead of Helena.
What is the cheapest way to fly from HLN to SOF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HLN–SOF that never appear on search engines, with no booking fees.