AC 178 then UA 3900 at Toronto Pearson
Edmonton → Toronto → Houston
Timetable, Toronto time
06:08AC 178 from Edmonton at the gate
11:30UA 3900 to Houston leaves the gate
5 h 22 apart on the timetable
The last days
AC 178 and UA 3900 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.