The groundings were lifted for at least two airlines within an hour on Monday. At least five airlines were affected by a computer issue Monday morning that grounded several flights in major cities around the country, according to the Federal Aviation Administration. Aerodata, the system which went down, is used by the airlines use to check the weight and balance of planes before takeoff. Aerodata has not yet responded to ABC News' requests for comment. Planes were grounded nationwide, including in Los Angeles, New York and Chicago, but systems for at least three of the major airlines were resolved within about an hour. The rest of the impacted airlines resolved the issue in the following hours. Delta, Southwest and American each reported the computer system issue was resolved before 8:30 a.m. and Southwest reported its ground stop was lifted within 40 minutes. Both Delta and Southwest said the outage caused delays but not cancellations. The short time down was not predicted to cause major ripple effects for travel Monday, but had the largest effect on Southwest flights. Twenty-two percent of Southwest flights were delayed Monday, according to the live flight-tracking website FlightAware, while other airlines saw delays in the ballpark of 2 to 5 percent. Most of the airlines apologized to passengers and asked for patience in response to grievances aired on Twitter, saying they were working to reduce the impact of scattered delays. "A brief third-party technology issue that prevented some Delta Connection flights from being dispatched on time this morning has been resolved. No cancellations are expected due to the issue and our teams are working to resolve some resulting delays," Delta said in a statement. "The technical issue that impacted a few of our regional carriers has been resolved. We apologize to our customers for the inconvenience," American Airlines responded to passenger complaints on Twitter. "We’re working with Customers on any impacts to their travel plans and we appreciate their understanding as we place nothing higher than the safe operation of every flight," Southwest said in a statement. Monday morning's computer issues come after several airlines of the same airlines suffered another outage to a different system last week. The Sabre system, which handles ticketing and boarding, affected American, JetBlue and Alaska Airlines. ABC News' David Kerley and Jeffrey Cook contributed to this report.<doc-sep>Multiple airlines on Monday were experiencing systemwide outages causing anger among travelers. Southwest, JetBlue and Delta confirmed the outages to Fox News and said they are working to remedy the issue as quickly as possible. AMERICAN AIRLINES FLIGHT FORCED TO RETURN TO BOSTON AIRPORT AFTER STRIKING FLOCK OF GEESE Early Monday morning, Southwest responded on Twitter to a beleaguered flier. “It's affecting our flights system wide, and we're working to see if it's affecting any other carriers this morning as well. In the meantime, once more information has been made available our Agents at the airport will be happy to disseminate it to y'all.” A few minutes later, Delta also addressed the problem with a customer: “I completely apologize, we are currently experiencing a System-Wide Outage we are working diligently to get it back up and running. We do not have a specific time as yet.” The FAA said in a statement the airlines were experiencing issues "with a flight planning weight and balance program called Aerodata. Mainline operations and regional operations are impacted to varying degrees." The agency said United, JetBlue and Alaska Airlines were also affected. Southwest Airlines later released a statement about the issue. "As of 6:05am CDT, Southwest Airlines has lifted an internal ground stop implemented for about 40 minutes this morning during an outage with a vendor that services multiple carriers with data used in flight planning,” the airline told Fox News. “Scattered flight delays are anticipated and Customers should check Southwest.com for the latest updates on specific flights. We're working with Customers on any impacts to their travel plans and we appreciate their understanding as we place nothing higher than the safe operation of every flight.” Southwest and Delta Airlines fliers tweeted about their displeasure with their delays. FOLLOW US ON FACEBOOK FOR MORE FOX LIFESTYLE NEWS Last week, travelers across the country were experiencing widespread computer outages causing delays across multiple airlines. American Airlines, Alaska Airlines and JetBlue were among the carriers affected. Fox News’ Michael Bartiromo contributed to this report.<doc-sep>"Scattered flight delays are anticipated and customers should check Southwest.com for the latest updates on specific flights," according to a statement. "We're working with customers on any impacts to their travel plans and we appreciate their understanding as we place nothing higher than the safe operation of every flight." Delta reported systems were back online just before 8 a.m. Delta agents work to resolve delays created by "a brief third-party technology issue" that impacted the airlines Monday morning. Credit: JOHN SPINK / JSPINK@AJC.COM Credit: JOHN SPINK / JSPINK@AJC.COM Delta and Southwest combined make up about 90 percent of the traffic at the Atlanta airport. “A brief third-party technology issue that prevented some Delta Connection flights from being dispatched on time this morning has been resolved,” Delta said in a statement to AJC.com. “No cancellations are expected due to the issue and our teams are working to resolve some resulting delays. We apologize to customers for any inconvenience.” Wait times at the Atlanta airport appear to be normal. According to the airport website, current wait times range from 15 to 30 minutes at most checkpoints. We are working to learn more. — Please return to AJC.com for updates. In other news:<doc-sep>U.S. airlines were briefly hit by systemwide computer outages on Monday related to problems with the Aerodata planning weight and balance program, the Federal Aviation Administration said. The outage affected several airlines, including Southwest Airlines, Delta Air Lines, American Airlines, United Airlines and Alaska Air Group. After reporting problems along with several major peers, however, Southwest said that technical issues had already been resolved and that systems would be back up soon. The airline said earlier that flights were delayed and planes that were taxiing had to return to their gates. Delta Airlines, which reporting a system-wide outage earlier Monday, confirmed that data had become available and flights were operating normally, with no cancellations planned. Earlier, carriers had reported problems through their social media accounts, with United Airlines saying it was unable to create paperwork as a result. American Airlines said the outage was affecting regional carriers nationwide, but has announced that AeoroData problems were resolved. Alaska Air Group Inc also said on its social media account that it was experiencing a system-wide outage. Southwest said in a statement that it has "lifted an internal ground stop implemented for about 40 minutes this morning during an outage with a vendor that services multiple carriers with data used in flight planning. Scattered flight delays are anticipated and Customers should check Southwest.com for the latest updates on specific flights." Last week, several airlines reported problems after Sabre, a company airlines use for printing tickets and making reservations, had technical issues. Sabre said it was not responsible for software issues Monday.<doc-sep>
Multiple airlines, including Southwest, American and Delta, saw their planes temporarily grounded early Monday morning due to a computer outage in a central system. As a result, travelers can expect lingering flight delays as airlines play catch-up. The Federal Aviation Administration said several airlines experienced issues with AeroData, a program that provides weight-and-balance information that is necessary to grant clearance for takeoff. The FAA said severity varied by airline. Southwest Airlines said the outage grounded flights for about 40 minutes. Airline spokesman Dan Landson said that scattered flight delays are anticipated and customers should check Southwest.com for the latest updates on specific flights. "We’re working with customers on any impacts to their travel plans and we appreciate their understanding as we place nothing higher than the safe operation of every flight,'' he said in a statement. By 8:15 a.m. EDT, American Airlines announced via Twitter that the issue, which had affected its regional flights, had been resolved. “Earlier this morning, AeroData had a technical issue that impacted a few of our regional carriers,'' American spokesman Ross Feinstein said in a statement. "This technical issue has been resolved. We apologize to our customers for the inconvenience.” Delta spokeswoman Savannah Huddleston said that airline was also back up and running after the AeroData outage, which had prevented its regional Delta Connection flights from taking off. “A brief third-party technology issue that prevented some Delta Connection flights from being dispatched on time this morning has been resolved,'' she said in a statement. ''No cancellations are expected due to the issue and our teams are working to resolve some resulting delays.'' Delta advised travelers to check their flight's status. Passengers complaining about the delays on Twitter said they were told it was a pilot paperwork issue.