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London (LHR) - Chicago (ORD)
Calculations with different methods
- 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).
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.
Flight map from London to Chicago.
Frequent Flyer Miles Calculator
London (LHR) → Chicago (ORD).