AA 2802 then UA 374 at Phoenix
Boston → Phoenix → Washington
Timetable, Phoenix time
11:36AA 2802 from Boston at the gate
23:59UA 374 to Washington leaves the gate
12 h 23 apart on the timetable
UA 374 leaves 12 h 23 after AA 2802 arrives on the timetable: more than half a day, so not a connection we count.