The flight distance from Ronald Reagan Washington Ntl Airport (DCA) in Washington, United States to Imam Khomeini International Airport (IKA) in Tehran, Iran is 10,191 kilometers (6,333 miles / 5,503 nautical miles). The estimated flight time for this route is approximately 13h, flying northeast at a heading of 40°.

This is an ultra-long-haul route, one of the longest in aviation. It requires wide-body aircraft with extended range capability such as the Airbus A350-900ULR or Boeing 777-200LR. Passengers should prepare for an extended flight with multiple meal services.

This is an international route connecting United States with Iran. It is an intercontinental flight between North America and Asia. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.

Time zone information: When it's 13:35 in Washington, it's 22:05 in Tehran. With a 8.5-hour time difference, travelers should plan for significant jet lag. It typically takes one day per hour of time difference to fully adjust.

There is a significant elevation difference of 3,291 feet between the two airports. Imam Khomeini International Airport sits higher than Ronald Reagan Washington Ntl Airport.

The return flight from Tehran (IKA) to Washington (DCA) follows a heading of 322° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.

For more information about these airports, visit the Ronald Reagan Washington Ntl Airport (DCA) and Imam Khomeini International Airport (IKA) detail pages, or use our flight duration calculator to compare other routes.