BR 642 then UA 5566 at O'Hare
Anchorage → Chicago → Pittsburgh
Timetable, Chicago time
08:55BR 642 from Anchorage at the gate
12:48UA 5566 to Pittsburgh leaves the gate
3 h 53 apart on the timetable
The last days
BR 642 and UA 5566 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.