There is no way to resolve the near-term structural FAA staffing issues,” he said in a letter to customers released Friday evening.  Start the day smarter. Get all the news you need in your inbox each morning.

Following the incident last week, the controllers from the Philadelphia TRACON took leave under the Federal Employees Compensation Act.

Several issues have led to delays and cancellations for about a week, and those disruptions were happening again Monday morning.