UA 654 then AA 1854 at O'Hare
Washington National → Chicago → San Francisco
Timetable, Chicago time
18:29UA 654 from Washington National at the gate
19:00AA 1854 to San Francisco leaves the gate
31 min apart on the timetable
The last days
UA 654 and AA 1854 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.