UA 3914 then DE 5003 at San Francisco
Manila → San Francisco → Seattle
Timetable, San Francisco time
09:36UA 3914 from Manila at the gate
10:39DE 5003 to Seattle leaves the gate
1 h 03 apart on the timetable
The last days
UA 3914 and DE 5003 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.