WN 1086 then B6 994 at Denver
Dallas → Denver → Boston
Timetable, Denver time
14:30WN 1086 from Dallas at the gate
14:00B6 994 to Boston leaves the gate
23 h 30 apart on the timetable, overnight
B6 994 leaves 23 h 30 after WN 1086 arrives on the timetable: more than half a day, so not a connection we count.