Nonstop flight route between Islip, New York, United States and St. Mary's, Alaska, United States:
Departure Airport:
 
    Arrival Airport:
 
    Distance from ISP to KSM:
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- About this route
- ISP Airport Information
- KSM Airport Information
- Facts about ISP
- Facts about KSM
- Map of Nearest Airports to ISP
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- Map of Furthest Airports from ISP
- List of Furthest Airports from ISP
- Map of Nearest Airports to KSM
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- List of Furthest Airports from KSM
About this route:
A direct, nonstop flight between Long Island MacArthur Airport (ISP), Islip, New York, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 3,789 miles (or 6,097 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 Long Island MacArthur Airport and St. Mary's 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 Long Island MacArthur Airport and St. Mary's Airport. You'll see that it will travel the same route of the red line on this map!
Departure Airport Information:
| IATA / ICAO Codes: | ISP / KISP | 
| Airport Name: | Long Island MacArthur Airport | 
| Location: | Islip, New York, United States | 
| GPS Coordinates: | 40°47'43"N by 73°6'1"W | 
| Area Served: | Long Island, New York metro area | 
| Airport Type: | Public | 
| Elevation: | 99 feet (30 meters) | 
| # of Runways: | 4 | 
| View all routes: | Routes from ISP | 
| More Information: | ISP Maps & Info | 
Arrival Airport Information:
| IATA / ICAO Codes: | KSM / PASM | 
| Airport Name: | St. Mary's Airport | 
| Location: | St. Mary's, Alaska, United States | 
| GPS Coordinates: | 62°3'38"N by 163°18'6"W | 
| Operator/Owner: | Alaska DOT&PF | 
| Airport Type: | Public | 
| Elevation: | 312 feet (95 meters) | 
| # of Runways: | 2 | 
| View all routes: | Routes from KSM | 
| More Information: | KSM Maps & Info | 
Facts about Long Island MacArthur Airport (ISP):
- A major proponent of the airport's 2004–2006 expansion projects was Peter J.
- The furthest airport from Long Island MacArthur Airport (ISP) is Margaret River Airport (MGV), which is located 11,783 miles (18,963 kilometers) away in Margaret River, Western Australia, Australia.
- In 2004 MacArthur Airport embarked on an expansion that included a Southwest Airlines terminal built by the airline at a cost of $65 million.
- The closest airport to Long Island MacArthur Airport (ISP) is Long Island MacArthur Airport (HAP), which is located only 0 mile (0 kilometer) N of ISP.
- Long Island MacArthur Airport (ISP) has 4 runways.
- Because of Long Island MacArthur Airport's relatively low elevation of 99 feet, planes can take off or land at Long Island MacArthur 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.
- In April 1942, four months after the bombing of Pearl Harbor, the Town of Islip contracted with the federal government to build an airfield on Town-owned land for military use.
- MacArthur Airport is connected with the nearby Long Island Rail Road station at Ronkonkoma by shuttle buses.
Facts about St. Mary's Airport (KSM):
- The furthest airport from St. Mary's Airport (KSM) is Cape Town International Airport (CPT), which is located 10,494 miles (16,889 kilometers) away in Cape Town, South Africa.
- St. Mary's Airport (KSM) has 2 runways.
- Because of St. Mary's Airport's relatively low elevation of 312 feet, planes can take off or land at St. Mary's 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 closest airport to St. Mary's Airport (KSM) is Mountain Village Airport (MOU), which is located only 13 miles (20 kilometers) W of KSM.




