Nonstop flight route between Arlington County, Virginia (near Washington, D.C.), United States and Tehran, Iran:
Departure Airport:

Arrival Airport:

Distance from DCA to THR:
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- About this route
- DCA Airport Information
- THR Airport Information
- Facts about DCA
- Facts about THR
- Map of Nearest Airports to DCA
- List of Nearest Airports to DCA
- Map of Furthest Airports from DCA
- List of Furthest Airports from DCA
- Map of Nearest Airports to THR
- List of Nearest Airports to THR
- Map of Furthest Airports from THR
- List of Furthest Airports from THR
About this route:
A direct, nonstop flight between Ronald Reagan Washington National Airport (DCA), Arlington County, Virginia (near Washington, D.C.), United States and Mehrabad Airport (THR), Tehran, Iran would travel a Great Circle distance of 6,323 miles (or 10,176 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 Ronald Reagan Washington National Airport and Mehrabad 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 Ronald Reagan Washington National Airport and Mehrabad Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
IATA / ICAO Codes: | DCA / KDCA |
Airport Name: | Ronald Reagan Washington National Airport |
Location: | Arlington County, Virginia (near Washington, D.C.), United States |
GPS Coordinates: | 38°51'7"N by 77°2'16"W |
Area Served: | Washington Metropolitan Area |
Operator/Owner: | Metropolitan Washington Airports Authority |
Airport Type: | Public |
Elevation: | 15 feet (5 meters) |
# of Runways: | 3 |
View all routes: | Routes from DCA |
More Information: | DCA Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | THR / OIII |
Airport Names: |
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Location: | Tehran, Iran |
GPS Coordinates: | 35°41'21"N by 51°18'48"E |
Area Served: | Tehran, Karaj |
Airport Type: | Joint (Public/Military) |
Elevation: | 3962 feet (1,208 meters) |
# of Runways: | 3 |
View all routes: | Routes from THR |
More Information: | THR Maps & Info |
Facts about Ronald Reagan Washington National Airport (DCA):
- With the addition of more flights and limited space in the aging main terminal, the airport began an extensive renovation and expansion in the 1990s.
- Ronald Reagan Washington National Airport (DCA) has 3 runways.
- Because of Ronald Reagan Washington National Airport's relatively low elevation of 15 feet, planes can take off or land at Ronald Reagan Washington National 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.
- The airport is southwest of Washington, D.C.
- Until 1999, Runways 1/19 and 4/22 were designated 18/36 and 3/21.
- The furthest airport from Ronald Reagan Washington National Airport (DCA) is Margaret River Airport (MGV), which is located 11,682 miles (18,800 kilometers) away in Margaret River, Western Australia, Australia.
- Originally the airport had no perimeter rule.
- The closest airport to Ronald Reagan Washington National Airport (DCA) is Bolling Air Force Base (BOF), which is located only 1 miles (2 kilometers) ESE of DCA.
Facts about Mehrabad Airport (THR):
- Mehrabad Airport handled 13,163,368 passengers last year.
- The airport has the head offices of Iran Air and the Iran Civil Aviation Organization.
- The furthest airport from Mehrabad Airport (THR) is Totegegie Airport (GMR), which is located 11,490 miles (18,491 kilometers) away in Mangareva, Gambier Islands, French Polynesia.
- An aircraft engineering and maintenance company Fajr Ashian, has a maintenance hangar adjacent to main airport premises.
- In addition to being known as "Mehrabad Airport", another name for THR is "فرودگاه مهرآباد".
- The closest airport to Mehrabad Airport (THR) is Tehran Imam Khomeini International Airport (IKA), which is located 21 miles (34 kilometers) SSW of THR.
- Mehrabad Airport (THR) has 3 runways.