UA 1593 then UA 6311 at Houston
San Francisco → Houston → Nashville
Timetable, Houston time
05:12UA 1593 from San Francisco at the gate
09:50UA 6311 to Nashville leaves the gate
4 h 38 apart on the timetable
Today
From the airport’s board at 06:59 Houston time
05:12UA 1593 due at the gate, no estimate yet
09:50UA 6311 due to leave, no estimate yet
4 h 38 between the gates, on these times
The last days
UA 1593 and UA 6311 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.