AA 3546 then UA 3236 at Detroit
Chicago O'Hare → Detroit → Washington
Timetable, Detroit time
09:26AA 3546 from Chicago O'Hare at the gate
13:05UA 3236 to Washington leaves the gate
3 h 39 apart on the timetable
The last days
AA 3546 and UA 3236 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.