Nonstop flight route between Cahokia, Illinois (near St. Louis), United States and Tehran, Iran:

About this route:

A direct, nonstop flight between St. Louis Downtown Airport (CPS), Cahokia, Illinois (near St. Louis), United States and Tehran Imam Khomeini International Airport (IKA), Tehran, Iran would travel a Great Circle distance of 6,759 miles (or 10,877 kilometers).

A Great Circle is the shortest distance between 2 points on a sphere. Because most world maps are flat (but the Earth is round), the route of the shortest distance between 2 points on the Earth will often appear curved when viewed on a flat map, especially for long distances. If you were to simply draw a straight line on a flat map and measure a very long distance, it would likely be much further than if you were to lay a string between those two points on a globe. Because of the large distance between St. Louis Downtown Airport and Tehran Imam Khomeini International Airport, the route shown on this map most likely appears curved because of this reason.

Try it at home! Get a globe and tightly lay a string between St. Louis Downtown Airport and Tehran Imam Khomeini International Airport. You'll see that it will travel the same route of the red line on this map!

Departure Airport Information:

Arrival Airport Information:

Facts about St. Louis Downtown Airport (CPS):

• The furthest airport from St. Louis Downtown Airport (CPS) is Margaret River Airport (MGV), which is located 10,998 miles (17,700 kilometers) away in Margaret River, Western Australia, Australia.
• Because of St. Louis Downtown Airport's relatively low elevation of 413 feet, planes can take off or land at St. Louis Downtown Airport at a lower air speed than at airports located at a higher elevation. This is because the air density is higher closer to sea level than it would otherwise be at higher elevations.
• St. Louis Downtown Airport (CPS) has 3 runways.
• The closest airport to St. Louis Downtown Airport (CPS) is Lambert–St. Louis International Airport (STL), which is located only 16 miles (27 kilometers) NW of CPS.
• The airport opened in 1929 as Curtiss-Steinberg Airport.

Facts about Tehran Imam Khomeini International Airport (IKA):

• Tehran Imam Khomeini International Airport (IKA) has 2 runways.
• Tehran Imam Khomeini International Airport handled 4,986,477 passengers last year.
• The closest airport to Tehran Imam Khomeini International Airport (IKA) is Mehrabad Airport (THR), which is located 21 miles (34 kilometers) NNE of IKA.
• Just prior to the opening on 8 May, two local airlines refused to switch to the new airport.
• The furthest airport from Tehran Imam Khomeini International Airport (IKA) is Totegegie Airport (GMR), which is located 11,511 miles (18,525 kilometers) away in Mangareva, Gambier Islands, French Polynesia.
• In addition to being known as "Tehran Imam Khomeini International Airport", another name for IKA is "فرودگاه امام خمینی".
• About 3 trillion rials have been sought for completing Phase 1 of Imam Khomeini International Airport, in the next Iranian year to March 2009, announced managing director of the State Airports Company, Asghar Ketabchi.
• Imam Khomeini Airport is accessible from Tehran by Car, taxi and bus via the Tehran-Qom Freeway.
• On 26 October 2007, it was announced that as of 28 October 2007 at midnight, all international flights except those bound to and from Damascus, Jeddah and Medina were transferred to the Imam Khomeini International Airport and the IKA became Tehran's primary international airport.
• However, on 8 May, a few hours after the opening of airport, the Revolutionary Guards of the Iranian Armed Forces closed it, citing security fears over the use of foreigners in the running of the airport.