Discover United Airlines Baggage Policyhas straightforward rules and flexibility in its baggage policy for travelers. For the most part, personal items and carry-ons are covered in most fare classes; however, Basic Economy does have some restrictions. Fees for checked bags vary by route and class, while international itineraries and premium classes do not have fees. MileagePlus membership and United credit card perks enhance the experience of flying with United. It is accommodative to special items, but the fees charged for oversized or overweight luggage may be high and require very careful preparation.