Air Miles Calculator

Distance between Spokane, WA (GEG) and Watertown, SD (ATY)

Flight distance from Spokane to Watertown (Spokane International Airport – Watertown Regional Airport) is 991 miles / 1595 kilometers / 861 nautical miles. Estimated flight time is 2 hours 22 minutes.

Driving distance from Spokane (GEG) to Watertown (ATY) is 1294 miles / 2082 kilometers and travel time by car is about 20 hours 45 minutes.

Map of flight path and driving directions from Spokane to Watertown.

Shortest flight path between Spokane International Airport (GEG) and Watertown Regional Airport (ATY).

How far is Watertown from Spokane?

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

Vincenty's formula (applied above)
  • 990.893 miles
  • 1594.687 kilometers
  • 861.062 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
  • 988.168 miles
  • 1590.303 kilometers
  • 858.695 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 Spokane International Airport
City: Spokane, WA
Country: United States Flag of United States
IATA Code: GEG
ICAO Code: KGEG
Coordinates: 47°37′11″N, 117°32′2″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

The time difference between Spokane and Watertown is 2 hours. Watertown is 2 hours ahead of Spokane.

Time Difference

Spokane, WA

 PST

Watertown, SD

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 150 kg (331 pounds).

Frequent Flyer Miles Calculator

Spokane (GEG) → Watertown (ATY).

Distance:
991
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
991

Round trip?