Delta Air Lines (NYSE: DAL) shares surged on Thursday, October 9, after posting stronger-than-expected third-quarter results.As per the report, the carrier’s revenue rose to $15.2 billion, up 4.1% year-over-year, reflecting operational strength and efficiency gains.  Accordingly, the company has lifted its full-year earnings per share (EPS) guidance to approximately $6, predicting a free cash flow in the $3.5–4 billion range.The airline’s stock is up nearly 6.5% in pre-market, sitting at $60.80 as of the ti ...