Originally Posted by
TribalistMeathead
I realize it's probably deliberate in order to maximize connection opportunities when arriving at LHR and ORD, but those are my least favorite times to depart ORD and LHR. Departing ORD at 5:30 pm means arriving LHR at midnight Chicago time with no sleep on the plane, and departing LHR at 10:50 am means leaving Oxfordshire at 6 am.
That's about the time that most Trans Atlantic flights leave ORD.