DL 420 then KD 220 at O'Hare
Savannah → Chicago → Anchorage
Timetable, Chicago time
13:13DL 420 from Savannah at the gate
17:10KD 220 to Anchorage leaves the gate
3 h 57 apart on the timetable
The last days
DL 420 and KD 220 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.