AS 477 then AV 2354 at San Francisco
Los Angeles → San Francisco → Denver
Timetable, San Francisco time
10:21AS 477 from Los Angeles at the gate
16:24AV 2354 to Denver leaves the gate
6 h 03 apart on the timetable
The last days
AS 477 and AV 2354 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.