Which self-respecting FFer would fly direct EWR-LHR anyway?

Seriously, I have been flying via IAD and often even via ORD (the fare isn't higher most of the time) or via RDU and ORD on AA. Consider that as a top tier on UA/AA, you will be flying BC at least 6/8 flights, can upgrade with miles easily and connecting through those airports give you more time to catch a good sleep on your BC seat.

Of course, if you were in 31" CO coach, you would want the shortest route!

There is very little benefit to flying CO internationally as an elite.