Flight time
8h 29m
estimated nonstop
Distance
3,942 mi
Time difference
London is 6 hours ahead of Chicago.
Estimated nonstop time from great-circle distance and typical airline block speeds. Actual times vary about ±30 min with winds, routing and aircraft - eastbound is usually faster than westbound. Times shown for direct flights; connections add layover time.
How long is the flight from Chicago to London?
The flight from Chicago (ORD) to London (LHR) takes approximately 8h 29m nonstop, covering a great-circle distance of 3,942 mi (6,344 km). London is 6 hours ahead of Chicago. Actual times vary by about 30 minutes with winds, air-traffic routing and aircraft type, and connecting flights take longer once you add layover time.
Chicago to London flight: FAQ
Flight time, distance and time difference for this route.
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