Packing can be a difficult part of your trip, and it can cause a lot of anxiety. At the airport, travelers face a variety of issues, ranging from long check-in waits to much longer security lines. Some of these issues can be prevented by properly packing a cabin and personal belongings. If you wish to bring carry-on luggage on a United flight, make sure you are aware of all the requirements ahead of time. Only when you are familiar with United Airlines baggage policy can you plan and prepare accordingly.