Southwest Airlines​ recently announced it will start charging $35 for the first checked bag. Here's a breakdown of how much revenue bag fees bring.

Southwest Airlines is ending its popular “bags fly free” policy. Starting May 28, passengers will have to pay $35 for the first checked bag and $45 for the second. This change brings Southwest in line with other major US airlines like American,

Starting Wednesday, free bags on Southwest will officially be a relic. The airline, which has long been under pressure from investors to charge for bags, said in a statement Tuesday that it will charge $35 for the first checked bag and $45 for a second.