UA 1852 then AA 5478 at DFW
San Francisco → Dallas-Fort Worth → Louisville
Timetable, Dallas-Fort Worth time
05:34UA 1852 from San Francisco at the gate
12:06AA 5478 to Louisville leaves the gate
6 h 32 apart on the timetable
The last days
UA 1852 and AA 5478 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.