Nonstop flight route between Sofia, Bulgaria and Tonopah, Nevada, United States:
Departure Airport:
 
    Arrival Airport:
 
    Distance from SOF to XSD:
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- About this route
- SOF Airport Information
- XSD Airport Information
- Facts about SOF
- Facts about XSD
- Map of Nearest Airports to SOF
- List of Nearest Airports to SOF
- Map of Furthest Airports from SOF
- List of Furthest Airports from SOF
- Map of Nearest Airports to XSD
- List of Nearest Airports to XSD
- Map of Furthest Airports from XSD
- List of Furthest Airports from XSD
About this route:
A direct, nonstop flight between Sofia Airport Vrazhdebna (SOF), Sofia, Bulgaria and Tonopah Test Range Airport (XSD), Tonopah, Nevada, United States would travel a Great Circle distance of 6,339 miles (or 10,202 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 Sofia Airport Vrazhdebna and Tonopah Test Range 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 Sofia Airport Vrazhdebna and Tonopah Test Range Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | SOF / LBSF | 
| Airport Names: | 
 | 
| Location: | Sofia, Bulgaria | 
| GPS Coordinates: | 42°41'42"N by 23°24'29"E | 
| Area Served: | Sofia, Bulgaria | 
| Operator/Owner: | Sofia Airport EAD | 
| Airport Type: | Public | 
| Elevation: | 1742 feet (531 meters) | 
| # of Runways: | 1 | 
| View all routes: | Routes from SOF | 
| More Information: | SOF Maps & Info | 
Arrival Airport Information:
| IATA / ICAO Codes: | XSD / KTNX | 
| Airport Name: | Tonopah Test Range Airport | 
| Location: | Tonopah, Nevada, United States | 
| GPS Coordinates: | 37°47'40"N by 116°46'42"W | 
| View all routes: | Routes from XSD | 
| More Information: | XSD Maps & Info | 
Facts about Sofia Airport Vrazhdebna (SOF):
- The furthest airport from Sofia Airport Vrazhdebna (SOF) is Chatham Islands (CHT), which is located 11,437 miles (18,405 kilometers) away in Waitangi, Chatham Islands, New Zealand.
- In 2004 Strabag demanded an additional 6 million euro due to rising steel prices.
- The project for the construction of a new airport control tower at Sofia Airport commenced on 16 June 2006 with a decision of the BULATSA Management Board.
- Sofia Airport Vrazhdebna (SOF) currently has only 1 runway.
- In addition to being known as "Sofia Airport Vrazhdebna", other names for SOF include "Vrazhdebna Airport" and "Летище София".
- The closest airport to Sofia Airport Vrazhdebna (SOF) is Plovdiv Airport (PDV), which is located 86 miles (138 kilometers) ESE of SOF.
- Sofia Airport Vrazhdebna handled 350,432 passengers last year.
- Options for different airport developments began to be examined in the mid-1960s.
Facts about Tonopah Test Range Airport (XSD):
- After the 4477th TES was inactivated, the remaining assets were reconstituted as a detachment of the 57th Fighter Wing at Nellis AFB.
- Near the end of the Cold War the program was abandoned and the squadron was disbanded.
- The Tonopah Test Range airfield came into existence in 1957 and was used by the Department of Energy, the Air Force, and several contractors.
- The closest airport to Tonopah Test Range Airport (XSD) is Tonopah Airport (TPH), which is located 25 miles (40 kilometers) NW of XSD.
- The advent of Operation Rolling Thunder during the Vietnam War in March of 1965 led to the introduction of the obsolete and subsonic MiG-17 and the supersonic MiG-21 by the North Vietnamese Air Force being pitted against U.S.
- On 12 August 1968, the IDF obtained two Syrian Air Force MiG-17F fighters that had gotten lost during a training flight and landed inadvertently at Besert Landing Field, Israel.
- The furthest airport from Tonopah Test Range Airport (XSD) is Pierrefonds Airport (ZSE), which is located 11,207 miles (18,036 kilometers) away in Saint-Pierre, Réunion.
- In addition, unconfirmed Soviet aircraft flown were MiG-25 Foxbat.




