Airlines are canceling hundreds of flights to comply with the FAA's order. But there are still questions about the plan, which the agency says will keep the skies safe during the government shutdown.

Flight delays and cancellations are piling up Saturday across the U.S. after the Federal Aviation Administration cut flights at 40 U.S. airports on Friday.

Both Houston's George Bush Intercontinental (IAH) and Hobby Airport (HOU) are on the FAA's list of 40 "high-volume" airports expected to face delays and flight cancellations starting Friday. The move comes as the shutdown—now the longest in U.S. history—has left t housands of air traffic controllers working without pay.

The Federal Aviation Administration will reduce air traffic at many busy airports to maintain safety during the government shutdown, which has led to staffing shortages of air traffic controllers.

Some experts say there is a solution that could change the dynamic in relatively short order — either privatize air traffic control, or set up a separate government corporation that can run the system.

The Federal Aviation Administration announced Wednesday its plans to reduce air traffic by 10% across 40 "high-volume" markets during the government shutdown.

The New York City area’s highest-volume airports, including JFK, LaGuardia and Newark, are among those set to be affected by 10% air traffic cuts that the FAA is poised to impose amid the ongoing, and longest-ever,

The Federal Aviation Administration issued a temporary ground stop for incoming flights to BNA due to the shortage around 2:30 p.m. on Nov. 8.

Flight delays linked to the ongoing federal government shutdown continue, with this past weekend marking the worst for air traffic control staffing shortages since the shutdown began, according to a CNN analysis of Federal Aviation Administration operations plans.

For the second consecutive day, flights into Austin-Bergstrom International Airport are likely to experience widespread delays due to air traffic control staffing shortages as controllers at the airport continue to work without pay.