If you search LAX-MKE the flight does not exist. (1736)
Searching LAX-MCI it does show up.
MCI-MKE also shows.
It is the same aircraft though MCI.
They don't seem to know what is going on either. I recall some time ago when Frontier introduced the 319s from MKE into the long haul markets, they also disappeared for a few weeks.
If flights disappear, Travelocity always seems to be showing the correct schedule.