# 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
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
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.

CDT

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?