MX 811 then QR 3307 at San Francisco
Cincinnati → San Francisco → Seattle
Timetable, San Francisco time
12:01MX 811 from Cincinnati at the gate
18:48QR 3307 to Seattle leaves the gate
6 h 47 apart on the timetable
The last days
MX 811 and QR 3307 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.