Nonstop flight route between Alton, Illinois, United States and SeaTac (near Seattle and Tacoma), Washington, United States:

About this route:

A direct, nonstop flight between St. Louis Regional Airport (ALN), Alton, Illinois, United States and Seattle–Tacoma International Airport (SEA), SeaTac (near Seattle and Tacoma), Washington, United States would travel a Great Circle distance of 1,715 miles (or 2,760 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 St. Louis Regional Airport and Seattle–Tacoma International Airport, the route shown on this map most likely still appears to be a straight line.

Departure Airport Information:

Arrival Airport Information:

Facts about St. Louis Regional Airport (ALN):

• St. Louis Regional Airport (ALN) has 2 runways.
• Because of St. Louis Regional Airport's relatively low elevation of 544 feet, planes can take off or land at St. Louis Regional 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.
• Civic Memorial Airport opened in 1946 and received its current name in 1984.
• The furthest airport from St. Louis Regional Airport (ALN) is Margaret River Airport (MGV), which is located 11,002 miles (17,706 kilometers) away in Margaret River, Western Australia, Australia.
• The closest airport to St. Louis Regional Airport (ALN) is Lambert–St. Louis International Airport (STL), which is located only 20 miles (32 kilometers) WSW of ALN.

Facts about Seattle–Tacoma International Airport (SEA):

• Seattle–Tacoma International Airport handled 34,776,666 passengers last year.
• The two-story North Concourse added four new gate positions and a new wing 600 feet long and 30 feet wide.
• Seattle–Tacoma International Airport (SEA) has 3 runways.
• The furthest airport from Seattle–Tacoma International Airport (SEA) is Tôlanaro Airport (FTU), which is located 10,781 miles (17,350 kilometers) away in Tôlanaro, Madagascar.
• The closest airport to Seattle–Tacoma International Airport (SEA) is Renton Municipal Airport (RNT), which is located only 5 miles (9 kilometers) NE of SEA.
• The airport was constructed by the Port of Seattle in 1944 to serve civilians of the region, after the U.S.
• A recurring problem at the airport is misidentification of the westernmost taxiway, Taxiway Tango, as a runway.
• There is also a scheduled bus service to downtown Vancouver, Canada, through Quick Shuttle, with other pick-up stops at downtown Seattle, Bellingham International Airport, and drop-off stops just inside the Canadian–U.S.
• In addition to being known as "Seattle–Tacoma International Airport", another name for SEA is "Sea–Tac Airport".
• Because of Seattle–Tacoma International Airport's relatively low elevation of 433 feet, planes can take off or land at Seattle–Tacoma 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.