AA 6232 then DL 3991 at Seattle
Lincoln → Seattle → San Francisco
Timetable, Seattle time
15:30AA 6232 from Lincoln at the gate
17:54DL 3991 to San Francisco leaves the gate
2 h 24 apart on the timetable
Seattle’s board gives a departure time for only about 56% of its flights, so many days show no gate time.
The last days
AA 6232 and DL 3991 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.