How Much Is an Extra Bag on United +1-844-570-3589 Airlines? Learn fees, rules, weight limits, and tips to save money while traveling comfortably with United Airlines. Traveling with United Airlines can be convenient and comfortable, but one common question for passengers is the cost of bringing extra baggage. Whether you are traveling for business, vacation, or visiting family, knowing the fees for additional luggage is important to avoid surprises at the airport. United Airlines has specific rules and charges for checked baggage, carry-ons, and overweight items, and understanding these details can help you plan your trip effectively.