DL 2919 then VA 8378 at San Francisco
Boston → San Francisco → Washington
Timetable, San Francisco time
23:31DL 2919 from Boston at the gatealso SK 3585, AF 3726, LA 6228
22:55VA 8378 to Washington leaves the gate
23 h 24 apart on the timetable, overnight
VA 8378 leaves 23 h 24 after DL 2919 arrives on the timetable: more than half a day, so not a connection we count.