TP 4399 then QR 4274 at San Francisco
Boston → San Francisco → San Diego
Timetable, San Francisco time
20:55TP 4399 from Boston at the gate
08:20QR 4274 to San Diego leaves the gate
11 h 25 apart on the timetable, overnight
The last days
TP 4399 and QR 4274 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.