LANSING, Mich. (Michigan News Source) – Flights are moving again after the Federal Aviation Administration (FAA) lifted its hours-long nationwide ground stop Friday night, but getting travelers to their destinations will take time.

Transportation Secretary Sean Duffy told reporters at a late-night White House briefing that American airspace reopened at 8:15 p.m. Eastern. He warned that flights would resume slowly as airlines worked through backed-up schedules and checked crew availability.

MORE NEWS: BREAKING: FAA Orders Nationwide Ground Stop

Duffy said overloaded switches and routers in the “incredibly old” air traffic control system caused inconsistent data, prompting officials to halt departures nationwide.

He called the situation an emergency and urged Congress to approve $50 billion for a complete overhaul.

Homeland Security Secretary Markwayne Mullin also attended the briefing. He said there was no indication of a cyberattack, although investigators had not completely ruled one out.

Mullin said preliminary findings suggested the introduction of new technology had overwhelmed older infrastructure. Duffy separately said the FAA’s AI-assisted SMART traffic-planning tool did not cause the outage.

The disruption affected thousands of flights, including the Washington Huskies’ trip to East Lansing to play Michigan State.

That travel delay pushed Saturday’s kickoff back to 5:30 p.m. Eastern at Spartan Stadium. The game will air on Big Ten Network.

MORE NEWS: Operation Fresh Catch Nets 14 Immigration Arrests in Northern Michigan

Travelers should check with their airlines for information about individual flights.