This article has been reviewed according to Science X's editorial process and policies . Editors have highlighted the following attributes while ensuring the content's credibility: A Delta Air Lines plane leaves the gate on July 12, 2021, at Logan International Airport in Boston. U.S. airline regulators have opened an investigation into Delta Air Lines, which is still struggling to restore operations on Tuesday, July 23, 2024, more than four full days after a faulty software update caused technological hav ...