Airline stocks United Airlines and American Airlines report second-quarter financials this week, with analysts expecting booming profits for both air carriers. The reports follow Delta Air Lines' recent Q2 earnings beat and full-year profit guidance increase. UAL and AAL both edged up Monday.

Wall Street predicts quarterly earnings up more than 100% for both United and American Airlines. Delta's financial report on Thursday suggested airline performance was nearing pre-pandemic levels, as air carriers see strong demand for international and domestic air travel.

Delta reported international and domestic sales jumping 61% and 8%, respectively. Delta Chief Executive Ed Bastian declared "consumer demand for air travel remains robust."

Despite the strong financial performance, Delta shares dropped nearly 3% for the week as investors took profits after the earnings report. That marked the stock's first decline in nine weeks. Collectively, the 19 stocks in IBD's Transportation-Airline industry group also slipped for the week -- for only the second time in nine weeks.

Eoin Treacy's view

Demand for travel is still strong over the summer months but the ability of airlines to meet that demand is much more uncertain. Twice in the last month my family have experienced greater than 24 hour delays with American Airlines.