Competitors are circling Southwest after the airline announced it's going to start charging for checked bags
1. Southwest Airlines is ending its hallmark free baggage policy. 2. United and Delta see potential customer gains from Southwest's policy change. 3. Investor pressure has driven Southwest to revamp its business strategies. 4. Southwest's stock has declined 26% over five years amid low passenger volumes. 5. The airline's recent layoffs signal a break from its traditional operational model.