In the latest trading session, Delta Air Lines (DAL) closed at $40.78, marking a +1.67% move from the previous day. This move outpaced the S&P 500's daily loss of 1.7%.Coming into today, shares of the airline had gained 5.22% in the past month. In that same time, the Transportation sector lost 1.77%, while the S&P 500 lost 0.27%.DAL will be looking to display strength as it nears its next earnings release. In that report, analysts expect DAL to post earnings of $0.26 per share. This would mark year-over-year growth of 107.88%. Meanwhile, the Zacks Consensus Estimate for revenue is projecting net sales of $8.29 billion, up 170.63% from the year-ago period.DAL's full-year Zacks Consensus Estimates are calling for earnings of -$3.74 per share and revenue of $28.38 billion. These results would represent year-over-year changes of +65.24% and +66.01%, respectively.Investors should also note any recent changes to analyst estimates for DAL. Recent revisions tend to reflect the latest near-term business trends. As a result, we can interpret positive estimate revisions as a good sign for the company's business outlook.Based on our research, we believe these estimate revisions are directly related to near-team stock moves. Investors can capitalize on this by using the Zacks Rank. This model considers these estimate changes and provides a simple, actionable rating system.The Zacks Rank system, which ranges from #1 (Strong Buy) to #5 (Strong Sell), has an impressive outside-audited track record of outperformance, with #1 stocks generating an average annual return of +25% since 1988. The Zacks Consensus EPS estimate has moved 11.34% lower within the past month. DAL currently has a Zacks Rank of #4 (Sell).The Transportation - Airline industry is part of the Transportation sector. This industry currently has a Zacks Industry Rank of 179, which puts it in the bottom 30% of all 250+ industries.The Zacks Industry Rank gauges the strength of our industry groups by measuring the average Zacks Rank of the individual stocks within the groups. Our research shows that the top 50% rated industries outperform the bottom half by a factor of 2 to 1.You can find more information on all of these metrics, and much more, on Zacks.com. Breakout Biotech Stocks with Triple-Digit Profit Potential The biotech sector is projected to surge beyond $2.4 trillion by 2028 as scientists develop treatments for thousands of diseases. They’re also finding ways to edit the human genome to literally erase our vulnerability to these diseases. Zacks has just released Century of Biology: 7 Biotech Stocks to Buy Right Now to help investors profit from 7 stocks poised for outperformance. Recommendations from previous editions of this report have produced gains of +205%, +258% and +477%. The stocks in this report could perform even better.See these 7 breakthrough stocks now>>Want the latest recommendations from Zacks Investment Research? Today, you can download 7 Best Stocks for the Next 30 Days. Click to get this free report Delta Air Lines, Inc. (DAL): Free Stock Analysis Report To read this article on Zacks.com click here.