By Thursday evening, around 200 flights within and out of the US had already been cancelled, with approximately 800 more anticipated for Friday.
Transport Secretary Sean Duffy stated the decision was crucial for air travel safety, citing immense stress and fatigue among unpaid air traffic controllers.
Airlines like United, American, Delta, and Alaska Air are adjusting schedules, with some offering passengers flexibility to change or cancel flights without penalty.
The 36-day government shutdown has forced 13,000 air traffic controllers and 50,000 TSA officers to work without pay, leading to widespread disruptions and political blame-shifting.