Originally Posted by
painintheuk
I definitely appreciate all the info, and I'll be interested to hear what people's experience is in a few weeks. I decided to go ahead and book it, so I'll have to do it next month

. I may add a stopover for a couple of days (anyone know if Y2 fare LHR-IAD allows stopovers?) which would make the question unimportant for me at least

.
Dr. PITUK
Some discounted Coach fares on AC US-LHR-US allow one stopover each direction.
Cannot speak for LHR-US-LHR.