Southwest Airlines Baggage Policy allows two free checked bags per passenger, with size and weight limits applying. Carry-on items are also included based on guidelines. Additional fees apply for oversized or extra luggage. For details on baggage rules or assistance, contact Southwest Airlines at +1(800) 912-9792.You must choose Baggage Policy on Southwest Airlines. You can also call us directly at our customer service, and they will guide you through the booking process.