The following visualizations were produced from cell phone data and published in the New York Times.
All of these travelers were from Wuhan.
"About 7 million people left in January, before travel was restricted."
Worth noting: more travelers went to Rome than Milan, and more travelers went to Los Angeles and San Francisco than to New York City.
https://www.nytimes.com/interactive/2020/03/22/world/coronavirus-spread.html