AS 602 then WN 1817 at Denver
Seattle → Denver → San Francisco
Timetable, Denver time
16:59AS 602 from Seattle at the gate
17:35WN 1817 to San Francisco leaves the gate
36 min apart on the timetable
The last days
AS 602 and WN 1817 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.