According to Southwest baggage allowance policy, if you are carrying three or more bags as checked luggage, then additional charges may be required. Certain passengers may want to carry excess baggage while traveling with Southwest Airlines. The carrier has made some strict Southwest Airlines baggage rules for luggage that surpass the size, weight, and quantity restrictions.Southwest checked bags are limited to 50 pounds and 62 inches in length, breadth, and height. The bag will be recognized as oversized if it is more than 50 pounds, and you will be charged $75 for the same. FOR MORE VISITE THE SITE OF AIRFLEETRATING