Air Miles Calculator

Distance between Chicago, IL (ORD) and Helena, MT (HLN)

Distance from Chicago to Helena (Helena Regional Airport – O'Hare International Airport) is 1231 miles / 1981 kilometers / 1069 nautical miles.

Calculations with different methods

Vincenty's formula (applied above)
  • 1230.723 miles
  • 1980.656 kilometers
  • 1069.469 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
  • 1227.627 miles
  • 1975.675 kilometers
  • 1066.779 nautical miles

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

Flight duration

Estimated flight time from O'Hare International Airport (ORD) to Helena Regional Airport (HLN) is 2 hours 49 minutes.

Time difference and current local times

The time difference between Chicago and Helena is 1 hour. Helena is 1 hour behind Chicago.

Time Difference

Chicago
Helena

Chicago, IL

 CDT

Helena, MT

 MDT

Airport information


A O'Hare International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: ORD
ICAO Code: KORD
Coordinates: 41°58′42″N, 87°54′17″W

B Helena Regional Airport
City: Helena, MT
Country: United States Flag of United States
IATA Code: HLN
ICAO Code: KHLN
Coordinates: 46°36′24″N, 111°58′58″W

Map

Chicago to Helena flight map.

Frequent Flyer Miles Calculator

Chicago (ORD) → Helena (HLN).

Elite level bonus (%):
Booking class bonus (%):
Air miles:
1231
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1231

Round trip?