UA 647 then WN 8539 at Denver
Durango → Denver → Austin
Timetable, Denver time
08:24UA 647 from Durango at the gate
12:18WN 8539 to Austin leaves the gate
3 h 54 apart on the timetable
The last days
UA 647 and WN 8539 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.