US opens probe into Delta following widespread flight cancellations

July 23 (Reuters) - The U.S. Transportation Department said on Tuesday it is opening an investigation into Delta Air Lines (DAL.N), opens new tab after the carrier canceled more than 5,000 flights since Friday as it struggles to recover from a global cyber outage, opens new tab that snarled airlines worldwide.

While other carriers have been able to resume normal operations, Delta has continued to cancel hundreds of flights daily of a crew scheduling system.