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  |
| 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 |
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?