UA 314 then DL 9921 at LAX
Boston → Los Angeles → Phoenix Sky Harbor
Timetable, Los Angeles time
17:53UA 314 from Boston at the gate
20:45DL 9921 to Phoenix Sky Harbor leaves the gate
2 h 52 apart on the timetable
The last days
UA 314 and DL 9921 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.