In the latest trading session, Southwest Airlines (LUV) closed at $51.98, marking a +0.8% move from the previous day. This change outpaced the S&P 500's 0.12% gain on the day.Coming into today, shares of the airline had lost 9.72% in the past month. In that same time, the Transportation sector lost 3.44%, while the S&P 500 gained 3%.LUV will be looking to display strength as it nears its next earnings release, which is expected to be July 22, 2021. On that day, LUV is projected to report earnings of -$0.33 per share, which would represent year-over-year growth of 87.64%. Our most recent consensus estimate is calling for quarterly revenue of $3.88 billion, up 284.77% from the year-ago period.For the full year, our Zacks Consensus Estimates are projecting earnings of -$1.27 per share and revenue of $15.56 billion, which would represent changes of +79.58% and +71.96%, respectively, from the prior year.Investors might also notice recent changes to analyst estimates for LUV. These revisions typically reflect the latest short-term business trends, which can change frequently. With this in mind, we can consider positive estimate revisions a sign of optimism about the company's business outlook.Our research shows that these estimate changes are directly correlated with near-term stock prices. We developed the Zacks Rank to capitalize on this phenomenon. Our system takes these estimate changes into account and delivers a clear, actionable rating model.The Zacks Rank system ranges from #1 (Strong Buy) to #5 (Strong Sell). It has a remarkable, outside-audited track record of success, with #1 stocks delivering an average annual return of +25% since 1988. The Zacks Consensus EPS estimate has moved 0.39% higher within the past month. LUV is currently sporting a Zacks Rank of #3 (Hold).The Transportation - Airline industry is part of the Transportation sector. This industry currently has a Zacks Industry Rank of 223, which puts it in the bottom 13% of all 250+ industries.The Zacks Industry Rank includes is listed in order from best to worst in terms of the average Zacks Rank of the individual companies within each of these sectors. Our research shows that the top 50% rated industries outperform the bottom half by a factor of 2 to 1.Make sure to utilize Zacks. Com to follow all of these stock-moving metrics, and more, in the coming trading sessions. Infrastructure Stock Boom to Sweep America A massive push to rebuild the crumbling U.S. infrastructure will soon be underway. It’s bipartisan, urgent, and inevitable. Trillions will be spent. Fortunes will be made. The only question is “Will you get into the right stocks early when their growth potential is greatest?” Zacks has released a Special Report to help you do just that, and today it’s free. Discover 7 special companies that look to gain the most from construction and repair to roads, bridges, and buildings, plus cargo hauling and energy transformation on an almost unimaginable scale.Download FREE: How to Profit from Trillions on Spending for Infrastructure >>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 Southwest Airlines Co. (LUV): Free Stock Analysis Report To read this article on Zacks.com click here.