Sofia to Seoul
10h 36mgate to gate
The flight from Sofia Airport (SOF) to Incheon International Airport (ICN) covers 8,193 km (5,091 miles) and takes approximately 10h 36m gate to gate for a typical jet.
The route heads north-east on an initial great-circle bearing of 54°, passing near 53.5° N, 77.7° E at its midpoint.
Bearing 54° north-east Midpoint 53.5° N, 77.7° E Model 805 km/h + 25 min
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
How this is worked out
- Take both airports' published coordinates from OurAirports — nothing here is scraped from another flight site.
- Great-circle distance by haversine on a mean earth radius of 6,371.0088 km: 8,193 km.
- Airborne time = that distance ÷ 805 km/h, a representative jet cruise speed: 10h 11m.
- Add a flat 25 minutes for pushback, taxi, climb, descent and taxi-in — the reason a 400 km hop is never half an hour: 10h 36m gate to gate.
- Winds, aircraft type and airline schedule padding are not modelled. The cruise-speed table shows how much that assumption is worth.
8,193 km / 805 km/h = 10h 11m airborne
+ 25 min ground = 10h 36m gate to gate
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
The same route, plotted on a world grid
The strip above gives the route its length and its shape. This gives it a position: latitude and longitude only, no coastlines, because a hand-drawn coastline would be decoration pretending to be data. On a flat grid the shortest path looks bent; on a globe it is straight.
Flight time at different cruise speeds
Aircraft type, winds and routing all move the real number. This is the same distance flown at different speeds, plus the 25-minute ground and climb allowance.
| Typical of | Cruise speed | Airborne | Gate to gate |
|---|---|---|---|
| Turboprop / regional | 550 km/h | 14h 54m | 15h 19m |
| Narrowbody jet (A320, 737) | 780 km/h | 10h 30m | 10h 55m |
| Widebody jet (777, 787, A350) | 900 km/h | 9h 06m | 9h 31m |
| Private jet (Gulfstream) | 850 km/h | 9h 38m | 10h 04m |
Headwinds on an eastbound long-haul routinely add 30–60 minutes; the same route westbound can be quicker. Airlines publish schedules with padding built in.
SOURCE·OurAirports + great-circle computation·REVIEWED JUL 2026
Both airports
| SOF | ICN | |
|---|---|---|
| Airport | Sofia Airport | Incheon International Airport |
| City | Sofia | Seoul |
| Country | Bulgaria | South Korea |
| ICAO | LBSF | RKSI |
| Coordinates | 42.6964, 23.4177 | 37.4691, 126.451 |
| Elevation | 1,742 ft | 23 ft |
Every figure on this plate is geometry. The shape of the earth is knowable; the airline's schedule is not.
Questions this plate answers
How long is the flight from Sofia to Seoul?
A non-stop flight from Sofia (SOF) to Seoul (ICN) takes about 10h 36m. The great-circle distance is 8,193 km (5,091 miles, 4,424 nautical miles), flying north-east on an initial bearing of 54°.
How far is Sofia from Seoul?
8,193 kilometres in a straight line over the earth's surface — 5,091 miles or 4,424 nautical miles. Actual flown distance is usually 2–5% longer because aircraft follow airways, avoid weather and route around restricted airspace.
Is there a non-stop flight between SOF and ICN?
This page calculates the direct-line time and distance; it does not track airline schedules. At 8,193 km the route is comfortably within range of a non-stop service if an airline chooses to fly it. Check an airline or booking site for what is actually scheduled.
What should I expect on a 10h 36m flight?
Anything past six hours is a long-haul flight: expect at least one meal service, a significant time-zone shift, and enough sitting that circulation and hydration start to matter. Cabin altitude, dry air and disrupted sleep do more damage to a training routine than the flight itself.
Airport coordinates from OurAirports (public domain). Distance is a great-circle calculation; flight time uses the model described on the method page. Flight times are great-circle estimates for planning only — always check the airline's published schedule.
