LR 654 then UA 1689 at Dulles
Guatemala City → Washington → Los Angeles
Timetable, Washington time
00:42LR 654 from Guatemala City at the gate
12:45UA 1689 to Los Angeles leaves the gate
12 h 03 apart on the timetable
UA 1689 leaves 12 h 03 after LR 654 arrives on the timetable: more than half a day, so not a connection we count.