UA 5814 then SY 8405 at Houston
Tulsa → Houston → Atlanta
Timetable, Houston time
08:45UA 5814 from Tulsa at the gate
18:30SY 8405 to Atlanta leaves the gate
9 h 45 apart on the timetable
The last days
UA 5814 and SY 8405 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.