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How far is Idaho Falls, ID, from St Louis, MO?

The distance between St Louis (St. Louis Lambert International Airport) and Idaho Falls (Idaho Falls Regional Airport) is 1175 miles / 1891 kilometers / 1021 nautical miles.

The driving distance from St Louis (STL) to Idaho Falls (IDA) is 1386 miles / 2231 kilometers, and travel time by car is about 24 hours 59 minutes.

St. Louis Lambert International Airport – Idaho Falls Regional Airport

Distance arrow
1175
Miles
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1891
Kilometers
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1021
Nautical miles

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Distance from St Louis to Idaho Falls

There are several ways to calculate the distance from St Louis to Idaho Falls. Here are two standard methods:

Vincenty's formula (applied above)
  • 1175.179 miles
  • 1891.268 kilometers
  • 1021.203 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
  • 1172.518 miles
  • 1886.985 kilometers
  • 1018.890 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 St Louis to Idaho Falls?

The estimated flight time from St. Louis Lambert International Airport to Idaho Falls Regional Airport is 2 hours and 43 minutes.

Flight carbon footprint between St. Louis Lambert International Airport (STL) and Idaho Falls Regional Airport (IDA)

On average, flying from St Louis to Idaho Falls generates about 160 kg of CO2 per passenger, and 160 kilograms equals 354 pounds (lbs). The figures are estimates and include only the CO2 generated by burning jet fuel.

Map of flight path and driving directions from St Louis to Idaho Falls

See the map of the shortest flight path between St. Louis Lambert International Airport (STL) and Idaho Falls Regional Airport (IDA).

Airport information

Origin St. Louis Lambert International Airport
City: St Louis, MO
Country: United States Flag of United States
IATA Code: STL
ICAO Code: KSTL
Coordinates: 38°44′55″N, 90°22′12″W
Destination Idaho Falls Regional Airport
City: Idaho Falls, ID
Country: United States Flag of United States
IATA Code: IDA
ICAO Code: KIDA
Coordinates: 43°30′52″N, 112°4′15″W