Air Miles Calculator

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

Flight distance from Chicago to Helena (Chicago O'Hare International Airport – Helena Regional Airport) is 1231 miles / 1981 kilometers / 1069 nautical miles. Estimated flight time is 2 hours 49 minutes.

Driving distance from Chicago (ORD) to Helena (HLN) is 1453 miles / 2338 kilometers and travel time by car is about 24 hours 35 minutes.

Map of flight path and driving directions from Chicago to Helena.

Shortest flight path between Chicago O'Hare International Airport (ORD) and Helena Regional Airport (HLN).

How far is Helena from Chicago?

There are several ways to calculate distances between Chicago and Helena. Here are two common 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 – the shortest distance between two points).

Airport information


A Chicago 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

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, IL

 CDT

Helena, MT

 MDT

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 163 kg (359 pounds).

Frequent Flyer Miles Calculator

Chicago (ORD) → Helena (HLN).

Distance:
1231
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
1231

Round trip?