Brownsville, TX (KRGV) — A nationwide ground stop ended Friday, but some flights at Brownsville South Padre Island International Airport still showed cancellations and delays.

As of 10 p.m., the airport had five cancellations and two delays on the board. A plane took off, but not everyone is reaching their destination as planned.

The Federal Aviation Administration blamed the ground stop on old air traffic control technology and overloaded routers that caused communication problems with air traffic controllers. Federal officials said airlines could take time to get back on schedule, and that could bring more disruptions for people flying this weekend.

READ MORE: Flights halted at airports across US due to unspecified 'extraordinary circumstances,' FAA says

Valley International Airport in Harlingen, Brownsville South Padre Island International Airport and McAllen International Airport issued travel advisories warning passengers of delays.

"We encourage all passengers to check directly with their airline for the latest flight status and travel updates," the McAllen International Airport said.

The advisories from the other airports have similar messages.