Originally Posted by tcook052
AC 52 is DEL-YYZ while AC 51 is YYZ-DEL and AC 54 is YYZ-DEL while AC 55 is DEL-YYZ. Opposite directions have different flight numbers with all airlines. With AC systemwide, everything east & south is even while all west & north bound are odd.
Well so, yyz-del has 2 numbers and so does del-yyz ? TC it still does not answer my question. Perhaps Empress might know the answer.