How far is London from Chicago?
There are several ways to calculate distances between Chicago and London. 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 O'Hare International Airport (ORD) to Heathrow Airport (LHR) is 7 hours 59 minutes.
Time difference and current local times
The time difference between Chicago and London is 6 hours. London is 6 hours ahead of Chicago.
Carbon dioxide emissions
Estimated CO2 emissions per passenger is 457 kg (1 007 pounds).
Chicago to London flight path
Shortest flight path between O'Hare International Airport (ORD) and Heathrow Airport (LHR).
Frequent Flyer Miles Calculator
Chicago (ORD) → London (LHR).