Nonstop flight route between San Diego, California, United States and St. Mary's, Alaska, United States:

About this route:

A direct, nonstop flight between San Diego International Airport (SAN), San Diego, California, United States and St. Mary's Airport (KSM), St. Mary's, Alaska, United States would travel a Great Circle distance of 2,856 miles (or 4,595 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 large distance between San Diego International 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 San Diego International 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:

Arrival Airport Information:

Facts about San Diego International Airport (SAN):

• The closest airport to San Diego International Airport (SAN) is NAS North Island (NZY), which is located only 3 miles (5 kilometers) SSW of SAN.
• San Diego International Airport (SAN) currently has only 1 runway.
• San Diego International Airport is testing a new system of airfield lights called Runway Status Lights for the FAA.
• Because of San Diego International Airport's relatively low elevation of 17 feet, planes can take off or land at San Diego 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 San Diego International Airport (SAN) is Sir Gaëtan Duval Airport (RRG), which is located 11,540 miles (18,571 kilometers) away in Rodrigues Island, Mauritius.
• Landing at the airport from the east offers closeup views of skyscrapers, Petco Park, and the Coronado Bridge from the left side of the aircraft.
• San Diego International is the busiest single-runway commercial airport in the United States, and the second-busiest single-use runway in the world after London Gatwick with about 550 departures and arrivals carrying 50,000 passengers each day, and a total of 17,250,269 passengers in 2012.
• SAN is in a populated area.
• The original terminal was on the north side of the airport and was used until the 1960s.
• In addition to being known as "San Diego International Airport", another name for SAN is "Lindbergh Field".

Facts about St. Mary's Airport (KSM):

• 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 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.
• 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.