Southwest Airlines baggage fees are one of the most consumer-friendly in the world. Customers can carry two bags for no additional fee, as long as each is 50 pounds or less and 62 linear inches or less. This generous policy applies to all types of fares, saving customers on ancillary charges. Overweight (51–100 lbs), and oversized (63–80 inches) bags have an extra fee of $100 per bag. Excess bags that weigh and measure over limits are $200. Southwest's open and affordable baggage policy is one reason it is the most popular airline for so many. Always check current fees on the Southwest Airlines website.