Bloomberg Airline miscues — such as the computer glitches that grounded hundreds of thousands of passengers this summer — are now the biggest cause of flight delays in the US Late arrivals triggered by mechanical breakdowns, a lack of flight crews and other factors attributed to the airlines were the largest category of delay last year for just the …

  Bloomberg Delta Air Lines Inc. offered its 13,000 pilots a raise of about 27 percent over four years, significantly less than what the employees have proposed in contract talks that have lingered since the beginning of the year. The carrier’s proposal was disclosed in a letter to pilots from John Malone, chairman of the Delta chapter of the Air …

  Bloomberg Oil extended its biggest loss in three weeks before the release of US crude inventory data on Wednesday, while Goldman Sachs Group Inc. cautioned that any OPEC deal to freeze output may only deepen the global oversupply. October futures fell as much as 1.7 percent in New York after declining for the first time in eight days on …