A 90-minute power outage at Newark Liberty International Airport disordered with airlines’ schedules and left them struggling to get back to ordinary late Monday afternoon. Residual delays were anticipated into the evening as a conclusion of the outage, which also affected 20,000 customers in neighboring cities

The Federal Aviation Administration was reporting one-hour arrival delays, and the monorail that moves among the airport’s three terminals was not working shortly after 5 p.m., about an hour after power was restored.

Air flights were admitted to earth for the period of the outage, but security checkpoints had to close, said Ron Marsico, a spokesperson for the Port Authority of New York and New Jersey, which manages the Newark Liberty International Airport airport.

“It was a little disorienting, but it wasn’t that bad,” said passenger Sy Carruthers, of Dorset, England, who was waiting for a flight to Iceland. “It’s just one of those things.”

It was also much better than the previous time he flew to the United States. That was December 27, when he said a storm kept his plane on the tarmac at John F. Kennedy International Airport in New York City for 10 hours.

Traffic on roads leading to the airport and on airport grounds was snarled Monday evening for the reason that traffic lights had been knocked out. They were increasingly being reset and turned back on.

Work crews were in the procedure of upgrading a Public Service Electric and Gas switching station in Elizabeth at 2:30 p.m. when an electrical failure knocked out power to customers in Hillside, Elizabeth, Union, Newark, Roselle, Linden, Kenilworth and Irvington, as well as the airport, said Bonnie Sheppard, a PSE&G spokeswoman. Power was restored around 4 p.m., she said.

The work was being done in order to arrange the station for peak summer power loads.

The Anheuser Busch brewery in Newark were also affected, where much of the Budweiser beer consumed in the New York metropolitan area is brewed; the Jersey Gardens Mall in Elizabeth; and the Tuscan Dairy in Union Township.