AA 3449 then UA 165 at O'Hare
Fargo → Chicago → Miami
Timetable, Chicago time
15:04AA 3449 from Fargo at the gate
18:43UA 165 to Miami leaves the gate
3 h 39 apart on the timetable
The last days
AA 3449 and UA 165 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.