"This is the third time in less than a year that a technical glitch has disrupted air travel on a large scale in the United States," per Afar.
"United has yet to reveal the precise details on what went wrong. Until then, air travelers should always be armed with information in case they encounter any issues, including knowing how best to track the status of your flight in real time, and how to best avoid flight delays and cancellations (and what to do when delays and cancellations occur)."