DL 3965 then AA 1211 at O'Hare
Minneapolis → Chicago → Seattle (SEA)
Timetable, Chicago time
16:41DL 3965 from Minneapolis at the gate
17:25AA 1211 to Seattle (SEA) leaves the gate
44 min apart on the timetable
The last days
DL 3965 and AA 1211 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.