Air Miles Calculator

Distance between London (LHR) and Chicago, IL (ORD)

Flight distance from London to Chicago (London Heathrow Airport – Chicago O'Hare International Airport) is 3953 miles / 6361 kilometers / 3435 nautical miles. Estimated flight time is 7 hours 59 minutes.

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).

Airport information


A London Heathrow Airport
City: London
Country: United Kingdom Flag of United Kingdom
IATA Code: LHR
ICAO Code: EGLL
Coordinates: 51°28′14″N, 0°27′42″W

B Chicago O'Hare International Airport
City: Chicago, IL
Country: United States Flag of United States
IATA Code: ORD
ICAO Code: KORD
Coordinates: 41°58′42″N, 87°54′17″W

Time difference and current local times

The time difference between London and Chicago is 6 hours. Chicago is 6 hours behind London.

Time Difference

London

 GMT

Chicago, IL

 CST

Carbon dioxide emissions

Estimated CO2 emissions per passenger is 450 kg (993 pounds).

Frequent Flyer Miles Calculator

London (LHR) → Chicago (ORD).

Distance:
3953
Elite level bonus:
0
Booking class bonus:
0

In total

Total frequent flyer miles:
3953

Round trip?