I fly ORD-PHX a good deal. The schedule for next winter shows only one or two flights/day on AA 733s and a number of additional flights on US 320s.

I much prefer the 733s and am willing to adjust my schedule to fly on them.

Is it likely that the AA 733s now showing on the schedules for next winter will be operating (along with the US 320s) or should one not depend on the schedules and assume that all service will be on old US 320 metal?

Thanks.