After scrambling to address the Federal Aviation Administration request on Wednesday to reduce air traffic by 10%, United Airlines, which has a hub at Denver International Airport, said Thursday that they’ve canceled 4% of flights through Sunday, “as per guidance from the FAA” through the weekend, said spokesperson Russell Carlton.

Denver International Airport appeared relatively calm Friday despite airlines canceling 4% of flights under a Federal Aviation Administration mandate, as most affected passengers were notified in advance and never came to the airport.

More than a hundred flights have been canceled at Denver International Airport over the weekend, as airlines followed new federal orders to reduce air traffic across the nation. While many major airlines have not released full lists of their canceled flights,

The largest airline provider in Denver, United Airlines, flew more than 2,000 flights in and out of Denver International Airport during the Labor Day weekend. The airline said this marked one of the busiest travel periods of the year for the airline.

“United is proposing four daily flights from Palomar airport: two to San Francisco (SFO) and two Denver (DEN) using the Embraer 175 (E175) aircraft,” she said. “United has indicated the earliest flight is proposed to depart Palomar at 7:30 a.m. and the last flight would return to Palomar Airport at 9:50 p.m.

The FAA has lifted its flight-reduction emergency order and allowed normal operations to resume across the National Airspace System.