Originally Posted by NYC2SGN

I can't find it on UA's website (perhaps they got rid of it), but in the past, you were able to waitlist for an alternate flight in X/XN. I don't know if it was official policy, but it's been done for me before (as recently as last month). When I look through their page about award ticket rules, it only mentions waitlisting for alternate flights in I/IN. Now I'm wondering if waitlisting for X/XN was ever actually officially allowed? For instance, you are confirmed for the 9:00 a.m. from ORD to DEN; connecting onto the 4:00 p.m. from DEN to LAX. But there is an earlier flight from DEN-LAX that leaves at 12:00 p.m. I've had agents waitlist me for the earlier flight. I've even been able to waitlist for both legs (in this example, there was an earlier flight from ORD-DEN that departed at 8:00 a.m., so they waitlist me for the 8:00 a.m. ORD-DEN and 12:00 p.m. DEN-LAX). Does anyone else have experiences with this?