By BRYAN GALLION and PAUL WISEMAN
Airlines canceled hundreds more flights because of staffing shortages tied to COVID-19 as the nation’s travel woes extended beyond Christmas. There was no clear indication when normal schedules would resume. More than 700 flights entering, leaving or flying within the U.S. were called off. That’s according to the flight-tracking website FlightAware. That figure was down from nearly 1,000 on Saturday. More than 50 flights were already canceled for Monday. Delta, United and JetBlue have blamed the omicron variant of the coronavirus for causing illness among many employees.