Distance Calculator
Tehran, Iran → Istanbul, Turkey
Distance Result
1,268 miles
2,040 km | 1,102 nautical miles
Straight-line (great circle) distance
The distance from Tehran to Istanbul is about 2,040 km (1,268 miles) as the crow flies, or 1,102 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 2.6 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
≈ 22h 40min
Estimated at 90 km/h average. Actual road distance is typically 15-30% longer than the straight line.
Flying
≈ 3h 9min
Estimated at 850 km/h cruising speed plus takeoff and landing time.
Route Map
Distances from Tehran to Nearby Cities
Frequently Asked Questions
The straight-line (great circle) distance between Tehran and Istanbul is 1,268 miles (2,040 kilometers).
A direct flight from Tehran to Istanbul takes approximately 3h 9min, based on an average cruising speed of 850 km/h plus takeoff and landing time.
Driving from Tehran to Istanbul takes approximately 22h 40min, assuming an average speed of 90 km/h. Actual time depends on the route and traffic.