Distance Calculator
Seongnam-si, South Korea → Gwangju, South Korea
Distance Result
158 miles
255 km | 138 nautical miles
Straight-line (great circle) distance
The distance from Seongnam-si to Gwangju is about 255 km (158 miles) as the crow flies, or 138 nautical miles.
This is the great-circle distance — the shortest path over the surface of the Earth, computed with the haversine formula from the coordinates of both cities. Road or rail distance is always longer, and the gap widens with every mountain range or coastline in between.
Putting the number to use
- At a cruising speed near 800 km/h the airborne time is about 0.3 hours; add 30-45 minutes for taxi, climb and descent.
- Time zone difference changes the arrival time on your ticket far more than the flying time does.
- For shipping, use road or sea distance instead — great-circle figures understate real routes.
Driving
≈ 2h 50min
Estimated at 90 km/h average. Actual road distance is typically 15-30% longer than the straight line.
Flying
≈ 1h 3min
Estimated at 850 km/h cruising speed plus takeoff and landing time.
Route Map
Distances from Seongnam-si to Nearby Cities
Frequently Asked Questions
The straight-line (great circle) distance between Seongnam-si and Gwangju is 158 miles (255 kilometers).
A direct flight from Seongnam-si to Gwangju takes approximately 1h 3min, based on an average cruising speed of 850 km/h plus takeoff and landing time.
Driving from Seongnam-si to Gwangju takes approximately 2h 50min, assuming an average speed of 90 km/h. Actual time depends on the route and traffic.