$Delta Air Lines(DAL)$ released its second quarter report.The data shows that Delta's revenue for the second quarter was $13.8 billion, up 10% from $12.5 billion in the same period in 2019, with a load factor of 87%, close to 88% in the same period in 2019. Revenues exceeded analysts' forecasts of $12.33 billion.In terms of size, it has fully recovered to pre-pandemic levels.In terms of revenue, $Delta Air Lines(DAL)$ has fully recovered from the impact of the pandemic.Three major factors led to Delta's 9% plunge1. Net income fell short of expectationsHowever, due to inflation and soaring costs, Delta's net income for the second quarter was only $735 million, less th