We were rushed to board the plane since it got in late from Miami--not our fault. We were literally told to hurry and get into our seats!! Final leg of flight from Chicago to Milwaukee was cancelled because they didn't have enough officers--insufficient staffing is a very poor excuse and United should be embarressed. No other flights available had to buy our own bus ticket. United personnel told us a voucher was available but the ticket refund would be more. Bus $31.00 tix refund $26. Misinformed--very disappointing.