Nonstop flight route between Xi'an, Shaanxi, China and Washington, D.C. / Virginia, United States:
Departure Airport:
 
    Arrival Airport:
 
    Distance from SIA to IAD:
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- About this route
- SIA Airport Information
- IAD Airport Information
- Facts about SIA
- Facts about IAD
- Map of Nearest Airports to SIA
- List of Nearest Airports to SIA
- Map of Furthest Airports from SIA
- List of Furthest Airports from SIA
- Map of Nearest Airports to IAD
- List of Nearest Airports to IAD
- Map of Furthest Airports from IAD
- List of Furthest Airports from IAD
About this route:
A direct, nonstop flight between Xi'an Xiguan Airport (SIA), Xi'an, Shaanxi, China and Washington Dulles International Airport (IAD), Washington, D.C. / Virginia, United States would travel a Great Circle distance of 7,353 miles (or 11,834 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 Xi'an Xiguan Airport and Washington Dulles 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 Xi'an Xiguan Airport and Washington Dulles International Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SIA / ZLSN | 
| Airport Names: | 
 | 
| Location: | Xi'an, Shaanxi, China | 
| GPS Coordinates: | 34°22'36"N by 109°7'12"E | 
| Area Served: | Xi'an | 
| Airport Type: | Public (defunct) | 
| # of Runways: | 1 | 
| View all routes: | Routes from SIA | 
| More Information: | SIA Maps & Info | 
Arrival Airport Information:
| IATA / ICAO Codes: | IAD / KIAD | 
| Airport Name: | Washington Dulles International Airport | 
| Location: | Washington, D.C. / Virginia, United States | 
| GPS Coordinates: | 38°56'39"N by 77°27'20"W | 
| Area Served: | Washington metropolitan area | 
| Airport Type: | Public | 
| Elevation: | 313 feet (95 meters) | 
| # of Runways: | 5 | 
| View all routes: | Routes from IAD | 
| More Information: | IAD Maps & Info | 
Facts about Xi'an Xiguan Airport (SIA):
- Xi'an Xiguan Airport (SIA) currently has only 1 runway.
- In addition to being known as "Xi'an Xiguan Airport", other names for SIA include "西安西关机场" and "Xī'ān Xīguān Jīchǎng".
- The closest airport to Xi'an Xiguan Airport (SIA) is Xi'an Xianyang International Airport (XIY), which is located 22 miles (35 kilometers) WNW of SIA.
- The furthest airport from Xi'an Xiguan Airport (SIA) is La Unión Airport (LUI), which is nearly antipodal to Xi'an Xiguan Airport (meaning Xi'an Xiguan Airport is almost on the exact opposite side of the Earth from La Unión Airport), and is located 12,392 miles (19,943 kilometers) away in La Unión, Honduras[disambiguation needed].
Facts about Washington Dulles International Airport (IAD):
- Loudoun County Transit provides a bus service which runs from the Dulles Town Center shopping center, to the airport, then to the Steven F.
- The design included a landscaped man-made lake to collect rainwater, a low-rise hotel, and a row of office buildings along the north side of the main parking lot.
- Washington Dulles Airport is the busiest airport in the Washington metropolitan area, and second busiest airport in the larger Baltimore–Washington metropolitan area with over 22 million passengers a year.
- Washington Dulles International Airport (IAD) has 5 runways.
- United Airlines maintains one of two East Coast hubs at Dulles which handled 56.7% of scheduled air carrier passengers at the airport.JetBlue handled 6.8% of scheduled air carrier passengers.
- Because of Washington Dulles International Airport's relatively low elevation of 313 feet, planes can take off or land at Washington Dulles International 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 furthest airport from Washington Dulles International Airport (IAD) is Margaret River Airport (MGV), which is located 11,659 miles (18,763 kilometers) away in Margaret River, Western Australia, Australia.
- The closest airport to Washington Dulles International Airport (IAD) is Leesburg Executive Airport (JYO), which is located only 11 miles (17 kilometers) NNW of IAD.
- In September 2009, a 121,700 square feet central Transportation Security Administration checkpoint was added on a new security mezzanine level of the main terminal.




