Raleigh, N.C. — Some US Airways customers at Raleigh-Durham International Airport had to wait as long as nine hours for flights after malfunctioning kiosks slowed down their travel Saturday.

The airline is advising customers to check-in online, if possible.

Printing boarding passes and even checking luggage has become troublesome in several cities as US Air tries to fix its kiosks. 

The computer glitch occurred when the airline tried to merge its reservation system with the reservation system of what used to be America West Airlines.

People have had to wait in lines for hours, and some even missed their flights.

Spring break was off to a slow start for Duke University student Celia Glass and her friends as they waited at RDU Saturday.

"We're approaching having spent a third of a day here," Glass said. "We've been here for so long that it just baffles my mind."

Airline officials are not sure when the issue will be resolved or exactly how many passengers have been affected, spokeswoman Liz Landau said. Customers are being given meal vouchers if their flight is more than two hours from departure.

Carla Olive, who sat waiting at RDU Saturday, was one the many unhappy customers.

"I'm too tired to be mad anymore. Earlier, it was lots of frustration. Now I'm just trying to get on the plane," Olive said. "Their customer service was awful. No one even apologized for their actions."