United Carry-On Bag Size and Rules +1-844-570-3589 ensure your bag fits overhead compartments follow TSA guidelines pack smartly and enjoy a smooth stress-free flight experience Traveling with the right carry-on bag can make your journey smoother and more comfortable. United Airlines has specific rules for carry-on baggage, including size, weight, and what items are allowed in the cabin. Understanding these rules before you pack will help you avoid delays, extra fees, or the frustration of having your bag checked at the gate. This guide provides a detailed explanation of United carry-on bag policies, including size limits, weight restrictions, personal items, prohibited items, and tips to make your travel experience easier.