When you fly with us, your first and second checked bags fly free but there are few limitations regarding size and weight. Additionally, please make sure that any sharp items are properly covered and secured to prevent any injury to yourself and to others who care for your bags. Also, Southwest airlines permit small inoculated domestic dogs and cats to travel with you in-cabin under the seat in front of you. All pets must be carried in a suitable carter. Also, the pet carrier counts as either carry-on items or personal items. For specific information about the Southwest airlines baggage policy, contact Southwest Airlines Phone Number.