AS 473 then AS 749 at Seattle
St Louis → Seattle → Las Vegas
Timetable, Seattle time
08:33AS 473 from St Louis at the gate
14:43AS 749 to Las Vegas leaves the gate
6 h 10 apart on the timetable
Seattle’s board gives a departure time for only about 59% of its flights, so many days show no gate time.
The last days
AS 473 and AS 749 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.