United Airlines Baggage Fees 2025: Costs, Rules, and How to Avoid Extra Charges

United Airlines, a major international carrier, charges baggage fees that vary by route, fare class, and loyalty status. For domestic flights, the first checked bag typically costs $35 and the second $45, while international routes may include one free checked bag depending on the destination and ticket type. These fees can add up quickly for families or frequent travelers. Understanding United's baggage policy is crucial for budgeting your trip and avoiding surprise charges at the airport. Key factors include your MileagePlus status, credit card benefits, and fare class—all of which can waive or reduce fees. For example, Premier members and select co-branded cardholders often receive complimentary checked bags. Additionally, overweight and oversized bags incur extra fees, sometimes exceeding $100 per bag. By planning ahead and leveraging loyalty perks, you can save significantly on baggage costs. With airline fees constantly evolving, staying informed is the best way to keep your travel expenses in check.