Join Date: Oct 2004
Location: Anywhere but home
Programs: UA 1K/MM, DL GM/MM, HH Dia, PC Plat, MR Gold, ALL Sil,
Posts: 4,552
As mherdeg points out, if some of your flights are operated by other carriers, sometimes those segments need to be confirmed by the operating airline before the ticket can be issued. Best to call United to have them sort it out.