Delta Air Lines is experiencing daily flight cancellations like many U.S. carriers. That's, in part, due to the Federal Aviation Administration mandating flight reductions as the government shutdown continues.

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

As the longest government shutdown in U.S. history drags on, airlines have been ordered to begin reducing operations on a phased-in basis.

American Airlines said that the 4% reduction will mean 220 canceled flights per day. The vast majority of impacted American Airlines flights are regional, and there’ll be no impact to international flights including Mexico, Canada and the Caribbean, CEO David Seymour said in a letter to employees. Further hub-to-hub routes impact will be minimized.

A shortage of air traffic controllers caused more flight disruptions Monday around the country as controllers braced for their first full missing paycheck during the federal government shutdown.

Moderate lines at Philadelphia International Airport were a breath of fresh air for weary travelers as they navigated gate changes, delays, and flight cancellations Sunday.