The summer schedule that goes till 26OCT13 is pretty much fixed by now. Its shows double 744 operations in the last week(s) of october, so I would assume that and go with it.
Code:
TN10OCTFRAJFK/ALH
** AMADEUS TIMETABLE - TN ** JFK JOHN F KENNEDY.USNY 10OCT13 17OCT13
1 LH 400 D FRA 1 JFK 1 1020 1245 0 01SEP13 26OCT13 744 8:25
2 LH 404 D FRA 1 JFK 1 1710 1950 0 31AUG13 26OCT13 744 8:40