Distance from Istanbul to Tehran
🇹🇷 Istanbul, Turkey → 🇮🇷 Tehran, Iran
The distance between Istanbul and Tehran is 2,035 kilometres (1,265 miles) measured as a great-circle (straight) line. Flying out of Istanbul Airport (IST), the initial heading is roughly east (100°), and a typical nonstop flight takes around 3h 3m. Actual flight paths and times vary with routing, winds and air-traffic constraints.
Istanbul
Turkey
The only major city spanning two continents, Istanbul bridges Europe and Asia across the Bosphorus with layers of Byzantine and Ottoman history.
Top sights: Hagia Sophia, Blue Mosque, Topkapi Palace, Grand Bazaar, Bosphorus cruise, Galata Tower
Tehran
Iran
Iran's sprawling capital sits below the snow-capped Alborz Mountains, mixing grand Qajar palaces, lively bazaars and modern museums.
Top sights: Golestan Palace, Grand Bazaar, Milad Tower, National Museum of Iran, Azadi Tower
Frequently asked questions
- How far is Tehran from Istanbul?
- 2,035 km (1,265 miles) in a straight line.
- How long is the flight from Istanbul to Tehran?
- About 3h 3m nonstop, at an average 800 km/h cruising speed plus taxi and climb time.
- What direction is Tehran from Istanbul?
- Tehran lies roughly to the east of Istanbul (initial bearing 100°).
- Which airports serve this route?
- Istanbul: Istanbul Airport (IST). Tehran: Imam Khomeini International Airport (IKA).
More distances from Istanbul
See the country profiles for Turkey and Iran, or open the Asia distance calculator.