There's a large gap in between DL
's B763 (190/195 seats) and their B777 (277 seats) and the B764 would fill it nicely.
I sat next to a DL
pilot on a recent trip, and he told me DL
was open to the possibility of using the B764 across the Atlantic (probably mostly ex-JFK
since the aircraft's range could pose a problem ex-ATL
), especially now that the extra capacity (compared to a domestic-configured B763) isn't really necessary. However, he also told me that the B762 fleet may be configured in BusinessElite and used for premium transcontinental flights (but would NOT fly across the Atlantic... I doubt these birds have the range, anyway). I doubt this would ever happen, so take his (or any other non-senior managerial employee) comments with doubts.
but they'd have to be fitted with PTV's
Only 8 of roughly 65+ (well, that number's smaller now that the MD
-11s are being phased out) planes used for trans-Atlantic flights have PTVs. The B764 would need BizElite, but not PTVs in Economy. The good news is that the B764 are wired/PTV-ready whereas virtually none of the B763 are.