OO 2071 then UA 9345 at Dulles
Milwaukee → Washington → Newark
Timetable, Washington time
10:50OO 2071 from Milwaukee at the gate
15:00UA 9345 to Newark leaves the gate
4 h 10 apart on the timetable
The last days
OO 2071 and UA 9345 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.