WirelessP

Getting ready to book a r/t (UA/M+) award US-IST, in Y for 2. No status. I could easily fly into several US/Canada gateway cities for a n/s from there to IST.

Seatguru says almost all of them fly non-stop with 773s in 3-3-3, except BOS & IAD (TK82/TK8) which use a333s 2-4-2. But seatguru hasn't always been correct in my experience. Is this info correct?

We're looking for best Y legroom, with IFE being second. Seatguru has Y pitch as "31-33" inches. So where on the 773s and a333s are the best "33 inch" Y pitches (besides bulkhead)? Will bulkhead be selectable 100 days out or is it likely to be already taken by others with status?

Is it worth it to have a much longer stopover in order to route to BOS/IAD for the a333s? Do some routes have newer/better planes? Any other differences between the two plane types or routes that I should know about?

Thanks a bunch for your help!!