The U.S. Federal Aviation Administration said on Friday it was delaying flights at eight airports including in Atlanta, San Francisco, Houston, Washington and Newark, citing widespread air traffic staffing issues as controllers have not been paid during the government shutdown.

Hundreds of flights scheduled for Friday were cut at major U.S. airports as part of the Federal Aviation Administration’s effort to phase in 10% reductions because of the government shutdown. The 40 airports are in what the FAA termed “high-volume markets” and include JFK,

Forty major airports are going to see many flight cancellations this weekend. If you're traveling through one of these, be sure to check your flight status.

CNN is tracking delays and cancellations for flights traveling to, from or within the US using data from FlightAware. Data updates every 15 minutes.

FAA cuts tied to shutdown cancel 815+ U.S. flights; major airports stay calm, airlines offer rebooking. Follow live.

Friday is the first day of the Federal Aviation Administration's plan to reduce air traffic by 10% across 40 “high-volume” markets.

Travelers at Harry Reid International Airport were bracing for the worst on Thursday, as many prepare for upcoming flight reductions across the country. “I’m more than a little concerned for sure,” traveler Angelo Mastrio said.

As promised, the Trump administration followed through on cancelling flights due to the federal shutdown and its effects on air traffic controllers.