DL 760 then F9 1051 at DFW
Boston → Dallas-Fort Worth → Las Vegas
Timetable, Dallas-Fort Worth time
10:50DL 760 from Boston at the gate
08:30F9 1051 to Las Vegas leaves the gate
21 h 40 apart on the timetable, overnight
F9 1051 leaves 21 h 40 after DL 760 arrives on the timetable: more than half a day, so not a connection we count.