My family is going to WDW in late August. We booked roundtrip United tickets for a great price. Our original flight plan was through Cleveland on the way down and on the way back. However United has completely changed our flight plan. The problem is the trip down. We are scheduled to leave not quite an hour earlier now and fly through Chicago O'Hare. It is only a 45 minute layover and requires a change of terminals. We are flying with 2 young children under age 6. I am very concerned that if we are even a touch off in our arrival, we may miss our connecting flight. Do we have the right to request a change of flight plan from United? What are our chances of it being granted? Thanks for the help!