How To Change Date On United Airlines ?????? Ticket? Changing the Date on your United Airlines ticket is easy. Use the official website and go to the "My Trips" section to upDate your reservation. Ensure you have your reservation details handy. Alternatively, contact United Airlines customer care +1-800-475-5173 (OTA) or +1(800)::475-::(5173) for personalized assistance.Additionally, if you booked through a travel agent, they can help you make the necessary changes. Each method ensures a straightforward process, though fees and fare differences may apply based on your ticket type. How To Change Date On A Ticket For United Airlines?