Originally Posted by
Air Houston
I don't know how the system officially works, but I have done same day changes on discount fares and switched to flights that were very nearly full, so I suspect that there does NOT need to be availability in the same booking code to make a same day change on PMCO.
I'm not 100% sure either, but I am sure someone will fill us in pretty quick. I have also done changes when Y only has a couple of seats left. I think that as long as they are selling seats, then you can do the SDC.