Originally Posted by
GUWonder
Keeping a plane in London to rest overnight is a problem for DL since it minimizes the number of revenue-earning hours squeezed out of the equipment in the course of trying to maximize revenue and earnings for a reportable quarter.
Not really, United have early departure from their night stopping IAD/ORD-LHR daylight flights, American likewise have JFK/ORD-LHR, the layover is 8-9 hours and allows and early LHR-US.
It is possible to do a full day's work on board nowadays for those who need to and avoid jetlag.