Air Miles Calculator

Distance between St Louis, MO (STL) and Watertown, SD (ATY)

Flight distance from St Louis to Watertown (St. Louis Lambert International Airport – Watertown Regional Airport) is 551 miles / 886 kilometers / 479 nautical miles. Estimated flight time is 1 hour 32 minutes.

Driving distance from St Louis (STL) to Watertown (ATY) is 700 miles / 1126 kilometers and travel time by car is about 11 hours 44 minutes.

Map of flight path and driving directions from St Louis to Watertown.

Shortest flight path between St. Louis Lambert International Airport (STL) and Watertown Regional Airport (ATY).

How far is Watertown from St Louis?

There are several ways to calculate distances between St Louis and Watertown. Here are two common methods:

Vincenty's formula (applied above)
  • 550.662 miles
  • 886.205 kilometers
  • 478.512 nautical miles

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

Haversine formula
  • 550.455 miles
  • 885.872 kilometers
  • 478.332 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).

Airport information


A 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

B Watertown Regional Airport
City: Watertown, SD
Country: United States Flag of United States
IATA Code: ATY
ICAO Code: KATY
Coordinates: 44°54′50″N, 97°9′16″W

Time difference and current local times

There is no time difference between St Louis and Watertown.

Time Difference

St Louis, MO

 CST

Watertown, SD

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 106 kg (234 pounds).

Frequent Flyer Miles Calculator

St Louis (STL) → Watertown (ATY).

Distance:
551
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
551

Round trip?