 Check with your carrier ahead of time. And again, Delta experiencing the most problems yet. Income inequality among the country's largest cities is highest in Atlanta. That's according to GoBankingRates, which noted a large disparity between the bottom 20% and the top 20% of income earners. The lowest income came in at an average of just over $11,000, while the top end earned nearly $325,000. The area's median income is just under $78,000. Hmm.