Southwest Airlines stock heads into the open after a 3.4% jump

At the close on September 17, 2026, Southwest Airlines stock extended its recent rebound with a gain of about 3.4 percent, outpacing the broader US market. Strong fall demand and reaffirmed third quarter guidance helped the shares move higher despite fuel cost headwinds.

Southwest Airlines stock closed at USD 40.63 on the New York Stock Exchange on September 17, 2026, up 3.37% from the previous session according to data cited in a recent market wrap. The move left the shares above levels near USD 38 seen earlier in the month and marked a solid advance compared with the broader US equity benchmarks.

September 17, 2026 in numbers

Southwest Airlines Co. (ISIN US8447411088, NYSE: LUV) saw its stock trade around USD 40.53 late in the session on September 17, 2026, before closing near USD 40.63, with intraday levels reported in that area by Yahoo Finance. Per the same market commentary, this represented a mid single digit percent gain on the day versus the prior close, underscoring a notable recovery from earlier-month lows near USD 38. While detailed day high, day low and volume figures were not highlighted in the wrap, the reported levels place the close comfortably within the recent trading range and above the short-term trough.

As Ad-hoc-news reported on September 17, 2026, investors reacted positively after Southwest Airlines' chief financial officer reiterated guidance for third quarter adjusted earnings per share despite sharply higher fuel costs, and the article noted that stronger than expected fall demand was supporting revenue trends. The same report cited second quarter 2026 revenue of USD 8.4 billion and adjusted earnings per share of USD 0.94, highlighting robust year-on-year growth that continued to underpin sentiment toward the stock. On the index side, a separate US market recap showed the Nasdaq Composite rising around 1.7% on September 17, 2026, indicating that Southwest's roughly 3.4% advance outperformed the broader technology-heavy benchmark.

Outlook today

Today, September 18, 2026, trading in Southwest Airlines shares will resume after the prior session's guidance-driven rally, with investors likely to continue focusing on management's reaffirmed earnings outlook and the sustainability of recent demand strength. As Ad-hoc-news noted, the company continues to project adjusted EPS of USD 3.25 to USD 4.25 for full year 2026 according to Seeking Alpha data referenced in the same piece, a range that will shape expectations ahead of the next quarterly update even though a specific reporting date in late September was not detailed in the available coverage. Broader US equity conditions also matter for the airline, with the previous session's gains in major indices suggesting a constructive backdrop as markets head into today's session, while ongoing fuel price volatility remains a watchpoint for carriers.