DL 9970 then MU 8720 at San Francisco
Seattle → San Francisco → Salt Lake City
Timetable, San Francisco time
11:15DL 9970 from Seattle at the gate
13:20MU 8720 to Salt Lake City leaves the gate
2 h 05 apart on the timetable
The last days
DL 9970 and MU 8720 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.