KL 623 then DL 2266 at Atlanta
Amsterdam → Atlanta → Buffalo
Timetable, Atlanta time
13:35KL 623 from Amsterdam at the gate
12:52DL 2266 to Buffalo leaves the gate
23 h 17 apart on the timetable, overnight
DL 2266 leaves 23 h 17 after KL 623 arrives on the timetable: more than half a day, so not a connection we count.