Travelers continue to face delays and cancellations as flight restrictions imposed by federal transportation officials in connection with the longest government shutdown in history enter their fourth day.

O'Hare International Airport was closed to many flights overnight Sunday into Monday as a serious early-season winter storm pounded the area.

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.

Travel disruptions at major airports are expected to worsen this week with airlines already canceling nearly 1,600 flights for Monday and nearly 1,000 for Tuesday as Congress works to reach a deal to reopen the federal government.

Travelers can expect to see fewer flights to many major U.S. cities starting Friday morning. That's when the Federal Aviation Administration says it will reduce traffic across 40 airports to ease the load on the nation’s air traffic controllers.

The FAA warns flight cuts could rise to 10% by Friday as TSA and air traffic controllers continue working without pay during the government shutdown.

Xavier Vega and his partner, Soluna Vega, cheered in relief as the “Welcome to Connecticut” sign came into view. It marked the end of an unplanned 17-hour highway odyssey home after their flight became one of more than 1,

As the government shutdown continues, more challenges await passengers as they deal with the Trump administration’s announcement of a 10 percent cut in flights at 40 U.S. airports.

“Even if the government reopens quickly, the impacts of the shutdown are still likely to be felt for days and weeks to come as airlines and airports get back to business, so don’t expect air travel to revert to normal anytime soon,” he noted.