Nonstop flight route between Seattle, Washington, United States and St. Marys, Pennsylvania, United States:
Departure Airport:

Arrival Airport:

Distance from BFI to STQ:
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- About this route
- BFI Airport Information
- STQ Airport Information
- Facts about BFI
- Facts about STQ
- Map of Nearest Airports to BFI
- List of Nearest Airports to BFI
- Map of Furthest Airports from BFI
- List of Furthest Airports from BFI
- Map of Nearest Airports to STQ
- List of Nearest Airports to STQ
- Map of Furthest Airports from STQ
- List of Furthest Airports from STQ
About this route:
A direct, nonstop flight between King County International Airport (BFI), Seattle, Washington, United States and St. Marys Municipal Airport (STQ), St. Marys, Pennsylvania, United States would travel a Great Circle distance of 2,171 miles (or 3,493 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 King County International Airport and St. Marys Municipal Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
IATA / ICAO Codes: | BFI / KBFI |
Airport Names: |
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Location: | Seattle, Washington, United States |
GPS Coordinates: | 47°31'48"N by 122°18'6"W |
Area Served: | Seattle, Washington |
Airport Type: | Public |
Elevation: | 21 feet (6 meters) |
# of Runways: | 2 |
View all routes: | Routes from BFI |
More Information: | BFI Maps & Info |
Arrival Airport Information:
IATA / ICAO Codes: | STQ / KOYM |
Airport Names: |
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Location: | St. Marys, Pennsylvania, United States |
GPS Coordinates: | 41°24'45"N by 78°30'8"W |
Area Served: | St. Marys, Pennsylvania |
Operator/Owner: | City of St. Marys |
Airport Type: | Public |
Elevation: | 1934 feet (589 meters) |
# of Runways: | 1 |
View all routes: | Routes from STQ |
More Information: | STQ Maps & Info |
Facts about King County International Airport (BFI):
- 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.
- 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.
- Passenger terminal, Boeing Field
- King County International Airport (BFI) has 2 runways.
- Boeing Field as seen from the Air Traffic Control Tower
- Boeing Field/King County International Airport covers 634 acres at an elevation of 21 feet above mean sea level.
- In addition to being known as "King County International Airport", another name for BFI is "Boeing Field".
- 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.
Facts about St. Marys Municipal Airport (STQ):
- The furthest airport from St. Marys Municipal Airport (STQ) is Margaret River Airport (MGV), which is located 11,533 miles (18,560 kilometers) away in Margaret River, Western Australia, Australia.
- The closest airport to St. Marys Municipal Airport (STQ) is DuBois Regional Airport (DUJ), which is located 26 miles (42 kilometers) SW of STQ.
- St. Marys Municipal Airport (STQ) currently has only 1 runway.
- In addition to being known as "St. Marys Municipal Airport", another name for STQ is "OYM".