Earnings season is upon us once again. One of the first stocks to report every quarter is Delta Air Lines (DAL -2.13%), one of the largest airlines in the world. Generating tens of billions in revenue across the globe, Delta Air's financial health gives investors a great read on the travel industry and the general health of consumer spending.This quarter, investors are looking pessimistically at Delta Air stock. Despite the company growing revenue and earnings in 2023, shares fell close to 10% the day after ...