Air Miles Calculator

Distance between Rock Springs, WY (RKS) and Kalispell, MT (FCA)

Flight distance from Rock Springs to Kalispell (Southwest Wyoming Regional Airport – Glacier Park International Airport) is 529 miles / 851 kilometers / 459 nautical miles. Estimated flight time is 1 hour 30 minutes.

Driving distance from Rock Springs (RKS) to Kalispell (FCA) is 685 miles / 1102 kilometers and travel time by car is about 12 hours 34 minutes.

Map of flight path and driving directions from Rock Springs to Kalispell.

Shortest flight path between Southwest Wyoming Regional Airport (RKS) and Glacier Park International Airport (FCA).

How far is Kalispell from Rock Springs?

There are several ways to calculate distances between Rock Springs and Kalispell. Here are two common methods:

Vincenty's formula (applied above)
  • 528.738 miles
  • 850.922 kilometers
  • 459.461 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
  • 528.635 miles
  • 850.755 kilometers
  • 459.371 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 Southwest Wyoming Regional Airport
City: Rock Springs, WY
Country: United States Flag of United States
IATA Code: RKS
ICAO Code: KRKS
Coordinates: 41°35′39″N, 109°3′54″W

B Glacier Park International Airport
City: Kalispell, MT
Country: United States Flag of United States
IATA Code: FCA
ICAO Code: KGPI
Coordinates: 48°18′37″N, 114°15′21″W

Time difference and current local times

There is no time difference between Rock Springs and Kalispell.

Time Difference

Rock Springs, WY

 MDT

Kalispell, MT

 MDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 103 kg (227 pounds).

Frequent Flyer Miles Calculator

Rock Springs (RKS) → Kalispell (FCA).

Distance:
529
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
529

Round trip?