Delta Air Lines' shares dropped 6.4% as soaring WTI crude oil prices reached a seven-month high, intensifying the burden of jet fuel costs for carriers. The company’s stock is now trading 12.8% lower than its February peak and has declined by 4.9% year-to-date, despite plans to expand its fleet with 34 additional Airbus A321neo jets. These operational hurdles follow recent flight suspensions and cancellations attributed to severe winter storms and international airspace closures.