Nonstop flight route between Cheyenne, Wyoming, United States and Seattle, Washington, United States:
Departure Airport:
 
    Arrival Airport:
 
    Distance from CYS to BFI:
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- About this route
- CYS Airport Information
- BFI Airport Information
- Facts about CYS
- Facts about BFI
- Map of Nearest Airports to CYS
- List of Nearest Airports to CYS
- Map of Furthest Airports from CYS
- List of Furthest Airports from CYS
- Map of Nearest Airports to BFI
- List of Nearest Airports to BFI
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- List of Furthest Airports from BFI
About this route:
A direct, nonstop flight between Cheyenne Regional Airport (CYS), Cheyenne, Wyoming, United States and King County International Airport (BFI), Seattle, Washington, United States would travel a Great Circle distance of 967 miles (or 1,556 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 Cheyenne Regional Airport and King County International Airport, the route shown on this map most likely still appears to be a straight line.
Departure Airport Information:
| IATA / ICAO Codes: | CYS / KCYS | 
| Airport Names: | 
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| Location: | Cheyenne, Wyoming, United States | 
| GPS Coordinates: | 41°9'20"N by 104°48'38"W | 
| Area Served: | Cheyenne, Wyoming | 
| Operator/Owner: | Cheyenne Regional Airport Board | 
| Airport Type: | Public | 
| Elevation: | 6159 feet (1,877 meters) | 
| # of Runways: | 2 | 
| View all routes: | Routes from CYS | 
| More Information: | CYS Maps & Info | 
Arrival Airport Information:
| IATA / ICAO Codes: | BFI / KBFI | 
| Airport Names: | 
 | 
| 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 | 
Facts about Cheyenne Regional Airport (CYS):
- Because of its high altitude, aircraft manufacturers test their planes at Cheyenne.
- Cheyenne Regional Airport (CYS) has 2 runways.
- The air demonstration at the fairgrounds in 1911 was less than impressive, but it was the beginning of a rich aviation history.
- The furthest airport from Cheyenne Regional Airport (CYS) is Sir Gaëtan Duval Airport (RRG), which is located 10,803 miles (17,385 kilometers) away in Rodrigues Island, Mauritius.
- Cheyenne ANGB also hosts an Army Aviation Support Facility of the Wyoming Army National Guard, operating UH-60 Blackhawk helicopters.
- In addition to being known as "Cheyenne Regional Airport", another name for CYS is "Jerry Olson Field".
- Because of Cheyenne Regional Airport's high elevation of 6,159 feet, planes must typically fly at a faster airspeed in order to takeoff or land at CYS. Combined with a high temperature, this could make CYS a "Hot & High" airport, where the air density is lower than it would otherwise be at sea level.
- The closest airport to Cheyenne Regional Airport (CYS) is Francis E. Warren Air Force Base (FEW), which is located only 3 miles (5 kilometers) WSW of CYS.
Facts about King County International Airport (BFI):
- The King County International Airport contracts with the King County Sheriff's Office for police services.
- 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.
- 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.
- King County International Airport (BFI) has 2 runways.
- Boeing Field had scheduled passenger flights on West Coast Airlines Douglas DC-9s and Fairchild F-27s to Idaho, Oregon, Washington, northern California, western Montana, northern Utah and to Calgary.
- 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.
- In addition to being known as "King County International Airport", another name for BFI is "Boeing Field".
- The initial assembly of the 737 was at Boeing Field in the 1960s because the factory in Renton was at capacity building the 707 and 727.
- 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.




