Looking for a YUL-FRA flight on Aug 15 to upgrade myself and a friend (preferably using SWU). On KVS, I found:
AC 874 YUL 17:15 FRA 06:30 +1 763 0 J9 C2 Y9 M9 B9 H9 V9 Q9 L9 I2
AC 834 YUL 19:40 FRA 08:55 +1 763 0 J9 C0 Y9 M9 B9 H9 V9 Q9 L9 I0
Does this mean there is no use in purchasing M fare on the later flight since I0 and I wont be able to upgrade in advance?