As part of ORD-SJO (UA), then PTY-SJO (Copa) and then SJO-ORD (UA).

My booking for the PTY-SJO leg was originally on 0391, departing PTY at 7:16pm, was then moved for some reason to 0192, departing PTY at 6:26, although 0391 was still showing on their schedule.

Called UA and got back on 0391 but was subsequently changed again to 0192.

Got back on 0391 (again) and yesterday was changed back to 0192 again.

UA changed it again, but I noticed that Copa isn't displaying a seat map for 0391 - this is on 1/2/16, I'm now worried that they may be in the process of reducing their schedule that day and 0391 may be on the chopping list.