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SOF to USN: distance & flight time
Sofia (Sofia Airport) → Ulsan (Ulsan Airport)
5,297 mi
8,525 km · 4,603 nm
10h 51m
estimated nonstop flight time
+6h
time difference · heading northeast
See live SOF→USN fares Phone-only fares on this route — call free
Flight time details
5,297 miles nonstop takes roughly 10h 51m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- SOF — Sofia Airport · Sofia, Bulgaria
- USN — Ulsan Airport · Ulsan, South Korea
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 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
Near USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is SOF from USN?
The flight distance from Sofia (SOF) to Ulsan (USN) is 5,297 miles (8,525 km, 4,603 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SOF to USN?
A nonstop flight takes about 10h 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 SOF to USN?
Nonstop service on SOF–USN 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 10h 51m nonstop estimate.
What is the time difference between Sofia and Ulsan?
Ulsan is 6 hours ahead of Sofia.
What is the cheapest way to fly from SOF to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SOF–USN that never appear on search engines, with no booking fees.
Why are some SOF to USN fares phone-only?
Consolidator contracts let us sell certain SOF–USN 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.