Originally Posted by
olimaspecto
Flights to/from LHR seem to be in the 100s (e.g 136 from LAX-LHR). The China flights are 288/289 because of the lucky number likely. And of course there is Flight 1776 from DFW-PHL

Not if you fly out of ORD!
i.e.
ORD-LHR: 90, 86, 46, 98.
LHR-ORD: 87, 67, 47, 97