Charlotte Douglas International Airport says TSA is forecasting a 2-4 percent increase in screened passengers from last year’s holiday season. Airlines report flights will be near capacity.

To ensure a smooth traveling experience, passengers should plan ahead, be prepared and arrive early to the airport, Charlotte-Douglas officials say. TSA advises arriving two hours before a domestic flight, three hours before an international trip.

The weather appeared to be cooperating for the most part, with no significant issues, National Weather Service meteorologist Amy Seeley said. There was light rain in Chicago, a major airline hub, but delays were only averaging 15 minutes, according to the Chicago Department of Aviation.

“It looks pretty quiet across the country today; I’ll take it,” Seeley said.

For those who didn’t want to drive, Amtrak was adding some extra trains Wednesday and Sunday between Chicago and Milwaukee, its biggest Midwest corridor, spokesman Marc Magliari said. Some Midwest trains have been sold out for several days, he said.

Amtrak CEO Wick Moorman said the railroad was prepared to handle extra riders.

“This is a day when we need everything to go right in order to not have a serious issue with delays, with folks being backed up into stations,” Moorman told reporters at New York’s Pennsylvania Station. “Knock on wood when I say this, everything’s going well.”