How far is Tehran from Chicago, IL?

The distance between Chicago (Chicago O'Hare International Airport) and Tehran (Mehrabad International Airport) is 6498 miles / 10458 kilometers / 5647 nautical miles.

Distance from Chicago to Tehran

There are several ways to calculate the distance from Chicago to Tehran. Here are two standard methods:

Vincenty's formula (applied above)

• 6498.491 miles
• 10458.308 kilometers
• 5647.035 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.

Haversine formula

• 6483.777 miles
• 10434.627 kilometers
• 5634.248 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

How long does it take to fly from Chicago to Tehran?

The estimated flight time from Chicago O'Hare International Airport to Mehrabad International Airport is 12 hours and 48 minutes.

What is the time difference between Chicago and Tehran?

The time difference between Chicago and Tehran is 9 hours 30 minutes. Tehran is 9 hours 30 minutes ahead of Chicago.

Flight carbon footprint between Chicago O'Hare International Airport (ORD) and Mehrabad International Airport (THR)

On average, flying from Chicago to Tehran generates about 785 kg of CO2 per passenger, and 785 kilograms equals 1 730 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path from Chicago to Tehran

See the map of the shortest flight path between Chicago O'Hare International Airport (ORD) and Mehrabad International Airport (THR).

Airport information

Origin	Chicago O'Hare International Airport
City:	Chicago, IL
Country:	United States
IATA Code:	ORD
ICAO Code:	KORD
Coordinates:	41°58′42″N, 87°54′17″W

Destination	Mehrabad International Airport
City:	Tehran
Country:	Iran
IATA Code:	THR
ICAO Code:	OIII
Coordinates:	35°41′21″N, 51°18′48″E