[CNN] New York (CNN Business)Airlines have canceled thousands of flights on Christmas Eve, including hundreds of US domestic flights, as staff and crew call out sick during the Omicron surge.Globally, airlines have canceled over 2,000 flights, 454 of which are within, into or out of the United States.
Operational snags at airlines are coming as millions are still flying in spite of rising coronavirus cases. The TSA says it screened 2.19 million people at airports across the country on Thursday, the highest figure since the uptick in holiday travel started a week ago.