WN 3774 then WN 8539 at Denver
San Francisco → Denver → Austin
Timetable, Denver time
09:30WN 3774 from San Francisco at the gate
12:18WN 8539 to Austin leaves the gate
2 h 48 apart on the timetable
The last days
WN 3774 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.