June 17, 2021 - Websites of major #US airline companies American Airlines (AAL.O), Southwest Airlines (LUV.N), United Airlines (UAL.O) and Delta Air Lines (DAL.N) faced an outage early on Thursday. Southwest Airlines canceled nearly 300 flights on Wednesday and delayed more than 500 a day after it was forced to temporarily halt operations over a computer glitch.

https://www.reuters.com/business/aerospace-defense/websites-major-us-airlines-face-outage-downdetector-2021-06-17