Y4 730 then AA 9973 at Houston
Mexico City → Houston → Dallas-Fort Worth
Timetable, Houston time
08:04Y4 730 from Mexico City at the gate
16:57AA 9973 to Dallas-Fort Worth leaves the gate
8 h 53 apart on the timetable
The last days
Y4 730 and AA 9973 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.