UA 3901 then AA 810 at San Francisco
Los Angeles → San Francisco → Dallas-Fort Worth
Timetable, San Francisco time
08:31UA 3901 from Los Angeles at the gate
13:57AA 810 to Dallas-Fort Worth leaves the gatealso QF 3064, BA 5598, RJ 7016
5 h 26 apart on the timetable
The last days
UA 3901 and AA 810 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.