Map of flight path from London to Chicago.
Shortest flight path between London Heathrow Airport (LHR) and Chicago O'Hare International Airport (ORD).
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).
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 450 kg (993 pounds).
Frequent Flyer Miles Calculator
London (LHR) → Chicago (ORD).