How far is Chicago from London?
There are several ways to calculate distances between London and Chicago. Here are two common methods:Vincenty's formula (applied above)
- 3952.811 miles
- 6361.433 kilometers
- 3434.899 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
- 3941.829 miles
- 6343.759 kilometers
- 3425.356 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 Heathrow Airport (LHR) to O'Hare International Airport (ORD) is 7 hours 59 minutes.
Time difference and current local times
The time difference between London and Chicago is 6 hours. Chicago is 6 hours behind London.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 457 kg (1 007 pounds).
London to Chicago flight map.
Frequent Flyer Miles Calculator
London (LHR) → Chicago (ORD).