Southwest Airlines allows each passenger to check two bags free of charge. Additionally, you can bring one personal item and one carry-on bag onboard without incurring any fees. The personal item should fit under the seat in front of you, while the carry-on bag must be able to fit in the overhead bins. After understanding Southwest airline baggage rules, you can plan your trip accordingly and avoid any unexpected fees or inconveniences. If you need to check more than two bags, you will be charged a fee per additional bag. The exact fees may vary depending on the destination, fare type, and time of booking. It's advisable to check Southwest's website or contact customer service for the most up-to-date information.