Navigating United Airlines' baggage policies can make your travel experience smoother. United allows one carry-on bag and one personal item for free, provided they meet size and weight restrictions. Checked baggage fees vary based on your route, ticket type, and MileagePlus status, with the first bag typically costing $30-$35. Oversized or overweight bags incur additional charges, so packing efficiently is key. For international flights, fees and allowances differ, so it's crucial to check before you fly. Understanding these policies ensures you're well-prepared, avoiding surprises at the airport, and making your journey with United hassle-free.