AA 2909 then UA 1999 at Charlotte
Hartford → Charlotte → Washington
Timetable, Charlotte time
20:47AA 2909 from Hartford at the gate
06:00UA 1999 to Washington leaves the gate
9 h 13 apart on the timetable, overnight
The last days
AA 2909 and UA 1999 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.