Lines at the Charleston International Airport remain long -- especially in the morning -- as the country faces some of the busiest travel days of the year.

Airport workers and members of the traveling public reported excessive lines and missed flights this morning, primarily during the morning hours, caused in part from security line backups as passengers were screened heading into the busy "A" concourse.

An estimated one out of every six Americans will fly on a U.S. airline before the holiday season ends amid the worst industry performance report in seven years.

Airport officials have historically warned to travelers to arrive at the airport at least two hours before their flight, and even earlier during holiday times.