F9 2633 then DL 825 at Atlanta
Baltimore → Atlanta → Las Vegas
Timetable, Atlanta time
07:56F9 2633 from Baltimore at the gate
20:42DL 825 to Las Vegas leaves the gate
12 h 46 apart on the timetable
DL 825 leaves 12 h 46 after F9 2633 arrives on the timetable: more than half a day, so not a connection we count.