DL 5226 then UA 3243 at Detroit
Providence → Detroit → Washington
Timetable, Detroit time
07:39DL 5226 from Providence at the gate
12:45UA 3243 to Washington leaves the gate
5 h 06 apart on the timetable
The last days
DL 5226 and UA 3243 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.