AA 9799 then DL 637 at O'Hare
New York JFK → Chicago → Seattle (SEA)
Timetable, Chicago time
16:51AA 9799 from New York JFK at the gate
17:48DL 637 to Seattle (SEA) leaves the gate
57 min apart on the timetable
The last days
AA 9799 and DL 637 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.