JL 717 then DL 4048 at Phoenix
Rapid City → Phoenix → Austin
Timetable, Phoenix time
09:23JL 717 from Rapid City at the gate
18:28DL 4048 to Austin leaves the gate
9 h 05 apart on the timetable
The last days
JL 717 and DL 4048 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.