American Airlines vendor outage delays over 200 DFW flights (dallasnews.com)
A vendor issue disrupted American Airlines' booking and check-in systems Friday, delaying more than 200 flights at DFW International Airport by 2:05 p.m. American and Southwest combined for over 2,000 delays nationwide, though Southwest said its delays were not caused by the same outage. American resolved the issue just after 2:30 p.m., saying its systems were operating normally.
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American didn't name the vendor, though Concur [1] and Duffel [2] both logged a Sabre outage in the exact same Friday window where cached flight searches still worked while booking and change writes failed. Those platforms connect to Sabre's GDS while AA's booking and check-in run on SabreSonic on the airline-hosting side, so if it was the same incident it likely sat in the shared TPF host or gateway layer where PNR writes and check-in transactions get committed.
[1] open.concur.com/details/p1/usg/Travel/2…
[2] duffelstatus.com/incidents/01M5MP5VSVTQ…