DL 541 then UA 274 at Dulles
Seattle → Washington → Hartford
Timetable, Washington time
00:20DL 541 from Seattle at the gate
22:31UA 274 to Hartford leaves the gate
22 h 11 apart on the timetable
UA 274 leaves 22 h 11 after DL 541 arrives on the timetable: more than half a day, so not a connection we count.