AA 6451 then WN 1591 at Denver
Los Angeles → Denver → San Antonio
Timetable, Denver time
11:21AA 6451 from Los Angeles at the gate
15:15WN 1591 to San Antonio leaves the gate
3 h 54 apart on the timetable
The last days
AA 6451 and WN 1591 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.