New Data Shows Delta’s Reliability Fell Apart In July — 4,626 Flights Canceled, Nearly 3X Southwest

New July performance data shows Delta’s reliability problems worsening, with 4,626 cancellations, nearly three times Southwest’s total, and a worse completion factor than United or American. Weather played a role, but Delta’s bigger issue is recovery: pilot scheduling, crew constraints, and cascading disruptions have turned major events into prolonged operational failures.