How far is Adak Island from Chicago?
There are several ways to calculate distances between Chicago and Adak Island. Here are two common methods:Vincenty's formula (applied above)
- 3988.817 miles
- 6419.379 kilometers
- 3466.188 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
- 3977.716 miles
- 6401.513 kilometers
- 3456.540 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).
Estimated flight time from O'Hare International Airport (ORD) to Adak Airport (ADK) is 8 hours 3 minutes.
Time difference and current local times
The time difference between Chicago and Adak Island is 4 hours. Adak Island is 4 hours behind Chicago.
Adak Island, AK
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 461 kg (1 017 pounds).
Chicago to Adak Island flight map.
Frequent Flyer Miles Calculator
Chicago (ORD) → Adak Island (ADK).