Southwest stands out among U.S. airlines by offering two free checked bags for every passenger, regardless of fare type. Additional bags, overweight items, or oversized baggage do carry fees, usually around $75 per bag. Carry-ons and personal items are free within size limits. This generous baggage policy makes Southwest popular with families and frequent travelers. For information on specific baggage charges, exceptions, or to confirm allowances for your route, call Southwest Airlines customer service at 831-298-4213. Agents can explain all baggage rules clearly before you head to the airport.