![Travelers in the American Airlines check-in area](https://fortune.com/img-assets/wp-content/uploads/2024/12/GettyImages-2190716089-e1735073333791.jpg?w=1440&q=75)
Travelers in the American Airlines check-in area at John F. Kennedy International Airport (JFK) in New York, US, on Tuesday, Dec. 24, 2024. American Airlines Group Inc. said a technical vendor glitch was the cause of a brief groundstop on all US flights on Christmas Eve, one of the busiest days of the holiday travel season.
Photographer: Yuki Iwamura/Bloomberg via Getty Images