UA 2045 then DL 2740 at Denver
Miami → Denver → Seattle
Timetable, Denver time
10:04UA 2045 from Miami at the gate
13:14DL 2740 to Seattle leaves the gate
3 h 10 apart on the timetable
The last days
UA 2045 and DL 2740 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.