Delta Airline is one of the top companies in the airline industry. The performance of delta airline has always been satisfactory for its investors. Delta Airline Stock price has been increasing from past six months because the company is performing well and generating higher revenues. The company’s operating income increased by 56% in fiscal year 2013. Other than that, the company’s net profit has also been quite well. It recorded net profit of $10.5 billion for full year 2013. The approximate per share earnings of Delta Airline for the fiscal year 2013 is around $2.46 because the free cash flow of the company were around $2.1 billion in fiscal year 2013. In fiscal year 2013, Delta airlines turned negative equity to positive position, by turning -$2.1 billion to $11.6 billion. Currently the Delta Airline Stock is trading at 2.3 times its book value, which is neither cheap nor expensive.