Originally Posted by djjaguar64
Why does AC have different flight numbers for the same route ? Just curious.

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.