The Transportation Secretary has ordered a 10% cut in flights at major airports due to air traffic safety concerns.

Transportation Secretary Sean Duffy announced 40 major airports would face a 10% cut in flights. See the full list of impacted airports.

Follow live updates as flight reductions begin today at 40 high-traffic airports in what officials have described as a "proactive" effort to alleviate pressure points.

Major airports appeared to be working largely as normal Friday as airlines canceled hundreds of flights across the United States, but widespread concern that the situation could worsen brought home the effects of

Airline passengers were already looking at higher fares and packed planes this holiday season. But the holiday headaches might get much worse as the government shutdown causes flight reductions at major airports.

The United States aviation network is facing significant strain as the ongoing federal government shutdown forces the FAA to scale back commercial flights nationwide. Major airports are already seeing cancellations and schedule changes,

Critical flight routes between Mexico and the United States face cancellation by November 7. Aeromexico flights from Mexico City airports will be significantly reduced. McAllen International Airport in Texas will also see impacts.