May 24--A widespread network outage at Sacramento International Airport delayed more than a dozen flights Wednesday morning.

Computer problems persisted through most of the morning at Terminal A, but at 10:15 a.m. airport officials said that network issues were resolved. Still, passengers were advised that some flights might be delayed up to 30 minutes until early afternoon.

There were no delays at Terminal B. Airport officials advised travelers to call their airlines to confirm departure times.

Laurie Slothower, airport spokeswoman, said the network outage was caused by a hardware problem. The computer outage initially affected all airlines except for Southwest. Slothower said the airport has backup systems to the network, but an "ancillary issue" rendered the backup system ineffective.

A total of 15 flights were delayed from 15 minutes to two hours. The average delay was 30 minutes, Slothower said.

Jason Huber from Phoenix was waiting with several hundred people in the lobby of Terminal A at about 6:30 a.m.

"It's been chaos," he said.

He was heading home from a business trip and had a 9 a.m. flight, but he said because the computers were down the airlines were checking in bags the old-fashioned way.

"They are calling people's flight numbers and doing this manually," Huber said. "It is what it is."

All @united flights are down at Sacramento international. This is just a Sac issue #Delays pic.twitter.com/YdEX8kwk1l

The airport and airlines made announcements over the public address system to keep travelers informed. The outage occurred about 3:30 a.m. and affected all systems at the airport, including Wi-Fi and the baggage handling system.

John Lesuer got to the airport at 5:30 a.m. for a 7 a.m. flight home to Washington, D.C., and ran into a packed house in Terminal A.

"I've been standing in line, one of the fun things you can do at an airport," he said.

Lesuer, who had been on a wine-tasting vacation in Amador, Napa, and Sonoma counties said he was not worried about his flight departing on time.

"I'm retired, I'm not in a rush," he said. "It doesn't do any good to get all wound up."

Slothower said experts worked as fast as they could to resolve the network issues.

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Lines were long Wednesday morning at Sacramento International airport after a computer outage hit.

Lines were long Wednesday morning at Sacramento International airport after a computer outage hit. Tony Bizjak tbizjak@sacbee.com

In this photo taken March 24, 2015, an Alaska Airlines jet takes off.

In this photo taken March 24, 2015, an Alaska Airlines jet takes off. Elaine Thompson AP