How far is Decatur, IL, from Seattle, WA?

The distance between Seattle (Seattle Boeing Field) and Decatur (Decatur Airport) is 1742 miles / 2803 kilometers / 1514 nautical miles.

The driving distance from Seattle (BFI) to Decatur (DEC) is 2117 miles / 3407 kilometers, and travel time by car is about 37 hours 10 minutes.

Distance from Seattle to Decatur

There are several ways to calculate the distance from Seattle to Decatur. Here are two standard methods:

Vincenty's formula (applied above)

• 1741.983 miles
• 2803.451 kilometers
• 1513.742 nautical miles

Vincenty's formula calculates the distance between latitude/longitude points on the earth's surface using an ellipsoidal model of the planet.

Haversine formula

• 1737.835 miles
• 2796.774 kilometers
• 1510.137 nautical miles

The haversine formula calculates the distance between latitude/longitude points assuming a spherical earth (great-circle distance – the shortest distance between two points).

How long does it take to fly from Seattle to Decatur?

The estimated flight time from Seattle Boeing Field to Decatur Airport is 3 hours and 47 minutes.

What is the time difference between Seattle and Decatur?

The time difference between Seattle and Decatur is 2 hours. Decatur is 2 hours ahead of Seattle.

Flight carbon footprint between Seattle Boeing Field (BFI) and Decatur Airport (DEC)

On average, flying from Seattle to Decatur generates about 196 kg of CO2 per passenger, and 196 kilograms equals 431 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from Seattle to Decatur

See the map of the shortest flight path between Seattle Boeing Field (BFI) and Decatur Airport (DEC).

Airport information

Origin	Seattle Boeing Field
City:	Seattle, WA
Country:	United States
IATA Code:	BFI
ICAO Code:	KBFI
Coordinates:	47°31′47″N, 122°18′7″W

Destination	Decatur Airport
City:	Decatur, IL
Country:	United States
IATA Code:	DEC
ICAO Code:	KDEC
Coordinates:	39°50′4″N, 88°51′56″W