Sofia to Istanbul
1h 00mgate to gate
The flight from Sofia Airport (SOF) to İstanbul Airport (IST) covers 467 km (290 miles) and takes approximately 1h 00m gate to gate for a typical jet.
The route heads east on an initial great-circle bearing of 108°, passing near 42.0° N, 26.1° E at its midpoint.
Bearing 108° east Midpoint 42.0° N, 26.1° 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: 467 km.
- Airborne time = that distance ÷ 805 km/h, a representative jet cruise speed: 35m.
- Add a flat 25 minutes for pushback, taxi, climb, descent and taxi-in — the reason a 400 km hop is never half an hour: 1h 00m gate to gate.
- Winds, aircraft type and airline schedule padding are not modelled. The cruise-speed table shows how much that assumption is worth.
467 km / 805 km/h = 35m airborne
+ 25 min ground = 1h 00m 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 | 51m | 1h 16m |
| Narrowbody jet (A320, 737) | 780 km/h | 36m | 1h 01m |
| Widebody jet (777, 787, A350) | 900 km/h | 31m | 56m |
| Private jet (Gulfstream) | 850 km/h | 33m | 58m |
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 | IST | |
|---|---|---|
| Airport | Sofia Airport | İstanbul Airport |
| City | Sofia | Istanbul |
| Country | Bulgaria | Turkey |
| ICAO | LBSF | LTFM |
| Coordinates | 42.6964, 23.4177 | 41.2749, 28.7321 |
| Elevation | 1,742 ft | 325 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 Istanbul?
A non-stop flight from Sofia (SOF) to Istanbul (IST) takes about 1h 00m. The great-circle distance is 467 km (290 miles, 252 nautical miles), flying east on an initial bearing of 108°.
How far is Sofia from Istanbul?
467 kilometres in a straight line over the earth's surface — 290 miles or 252 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 IST?
This page calculates the direct-line time and distance; it does not track airline schedules. At 467 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.
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.
