Nonstop flight route between San Diego, California, United States and Marathon, Florida, United States:
Departure Airport:

Arrival Airport:

Distance from SDM to MTH:
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- About this route
- SDM Airport Information
- MTH Airport Information
- Facts about SDM
- Facts about MTH
- Map of Nearest Airports to SDM
- List of Nearest Airports to SDM
- Map of Furthest Airports from SDM
- List of Furthest Airports from SDM
- Map of Nearest Airports to MTH
- List of Nearest Airports to MTH
- Map of Furthest Airports from MTH
- List of Furthest Airports from MTH
About this route:
A direct, nonstop flight between Brown Field Municipal Airport (SDM), San Diego, California, United States and Florida Keys Marathon Airport (MTH), Marathon, Florida, United States would travel a Great Circle distance of 2,234 miles (or 3,595 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 relatively short distance between Brown Field Municipal Airport and Florida Keys Marathon Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | SDM / KSDM |
Airport Name: | Brown Field Municipal Airport |
Location: | San Diego, California, United States |
GPS Coordinates: | 32°34'19"N by 116°58'49"W |
Area Served: | San Diego, California |
Operator/Owner: | City of San Diego |
Airport Type: | Public |
Elevation: | 526 feet (160 meters) |
# of Runways: | 2 |
View all routes: | Routes from SDM |
More Information: | SDM Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | MTH / KMTH |
Airport Name: | Florida Keys Marathon Airport |
Location: | Marathon, Florida, United States |
GPS Coordinates: | 24°43'33"N by 81°3'5"W |
Operator/Owner: | Monroe County |
Airport Type: | Public |
Elevation: | 7 feet (2 meters) |
# of Runways: | 1 |
View all routes: | Routes from MTH |
More Information: | MTH Maps & Info |
Facts about Brown Field Municipal Airport (SDM):
- The closest airport to Brown Field Municipal Airport (SDM) is Tijuana International Airport (TIJ), which is located only 2 miles (4 kilometers) SSE of SDM.
- On September 1, 1962 the Navy transferred ownership of Brown Field to the City of San Diego, with the condition that it remains a public airport.
- In 1951 the Navy reopened Brown Field due to increased military activity from the Korean War.
- Because of Brown Field Municipal Airport's relatively low elevation of 526 feet, planes can take off or land at Brown Field Municipal 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.
- Brown Field Municipal Airport (SDM) has 2 runways.
- On March 16, 1991, seven members of Reba McEntire's band and her road manager were among 10 people who died in the crash of a plane that departed from Brown Field.
- In 1946 the Navy decommissioned Brown Field and turned it over to San Diego County.
- The furthest airport from Brown Field Municipal Airport (SDM) is Sir Gaëtan Duval Airport (RRG), which is located 11,551 miles (18,590 kilometers) away in Rodrigues Island, Mauritius.
Facts about Florida Keys Marathon Airport (MTH):
- The closest airport to Florida Keys Marathon Airport (MTH) is NAS Key West (NQX), which is located 41 miles (67 kilometers) WSW of MTH.
- Florida Keys Marathon Airport (MTH) currently has only 1 runway.
- Marathon Airport was originally constructed by the United States Navy in the early 1940s as Outlying Field Marathon, an auxiliary airfield to Naval Air Station Key West.
- Marathon Airport was served by American Eagle Airlines until 2000.
- In mid summer of 2007, Delta announced it would end service to Marathon Airport due to low demand.
- On October 4, 2008, Continental Airlines announced it would begin commercial service to Marathon Airport via a Cape Air codeshare to Southwest Florida International Airport in Fort Myers, with TSA security clearance to occur once on the ground in Fort Myers, if connecting to another flight.
- The furthest airport from Florida Keys Marathon Airport (MTH) is Cocos (Keeling) Island Airport (CCK), which is located 11,560 miles (18,603 kilometers) away in Cocos Islands, Australia.
- Because of Florida Keys Marathon Airport's relatively low elevation of 7 feet, planes can take off or land at Florida Keys Marathon 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.