Southwest Airlines' baggage policies is known for its friendly service.One of the perks of flying Southwest is that your first two checked bags fly free. Southwest has specific restrictions on items that can be checked. Dangerous goods, such as firearms, ammunition, and flammable materials, are prohibited. It's essential to familiarize yourself with the complete list of prohibited items before checking your bag. Southwest uses a boarding system where passengers are assigned boarding positions. Having a smaller carry-on bag can increase your chances of finding overhead bin space.