Nonstop flight route between Seattle, Washington, United States and St. Helens, Tasmania, Australia:

About this route:

A direct, nonstop flight between King County International Airport (BFI), Seattle, Washington, United States and St Helens Airport (HLS), St. Helens, Tasmania, Australia would travel a Great Circle distance of 8,210 miles (or 13,212 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 King County International Airport and St Helens 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 King County International Airport and St Helens 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 King County International Airport (BFI):

• In addition to being known as "King County International Airport", another name for BFI is "Boeing Field".
• It is in the National Plan of Integrated Airport Systems for 2011–2015, which called it a primary commercial service airport.Federal Aviation Administration records say the airport had 34,597 passenger boardings in calendar year 2008, 35,863 in 2009 and 33,656 in 2010.
• Because of King County International Airport's relatively low elevation of 21 feet, planes can take off or land at King County 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.
• At one point Aeroamerica scheduled a Boeing 720 to Spokane.
• The furthest airport from King County International Airport (BFI) is Tôlanaro Airport (FTU), which is located 10,775 miles (17,341 kilometers) away in Tôlanaro, Madagascar.
• King County International Airport (BFI) has 2 runways.
• The Museum of Flight is on the southwest corner of the field.
• Helijet, a helicopter airline based at Vancouver International Airport in British Columbia, scheduled Sikorsky S-76s to the Victoria Harbour Heliport in British Columbia and on to Helijet's Vancouver Harbour Heliport near downtown Vancouver, B.C.
• The closest airport to King County International Airport (BFI) is Renton Municipal Airport (RNT), which is located only 5 miles (8 kilometers) ESE of BFI.
• Except for the World War II period, when it was taken over by the U.S.

Facts about St Helens Airport (HLS):

• Because of St Helens Airport's relatively low elevation of 158 feet, planes can take off or land at St Helens 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 Helens Airport (HLS) is Corvo Airport (CVU), which is nearly antipodal to St Helens Airport (meaning St Helens Airport is almost on the exact opposite side of the Earth from Corvo Airport), and is located 12,317 miles (19,823 kilometers) away in Corvo Island, Azores, Portugal.
• The closest airport to St Helens Airport (HLS) is Launceston Airport (LST), which is located 57 miles (92 kilometers) WSW of HLS.
• St Helens Airport (HLS) currently has only 1 runway.