DL 1287 then UA 5207 at Houston
Los Angeles → Houston → Chicago
Timetable, Houston time
23:50DL 1287 from Los Angeles at the gate
07:00UA 5207 to Chicago leaves the gate
7 h 10 apart on the timetable, overnight
The last days
DL 1287 and UA 5207 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.