Omicron: Hundreds of US flights cancelled on Christmas Day

Delta Air Lines, United Airlines, JetBlue Airways and American Airlines cancelled more than 750 flights combined on Christmas Day, and cancellations are set to drag on through Sunday, upending plans during one of the busiest travel periods of the year. 

According to flight tracker FlightAware, Saturday evening report: 

Delta has canceled more than 300 Christmas Day flights, or about 15% of scheduled flights, as well as more than 80 Sunday flights.

United has so far canceled 240 Saturday flights – 12% of scheduled flights – and more than 70 Sunday flights. 

JetBlue canceled 125 Saturday flights.

American canceled more than 90 Saturday flights.

Sunday cancellation rates remained low at JetBlue and American as of Saturday afternoon. All four airlines said omicron cases among staff were driving cancellations. Delta expects more than 300 of its flights will be cancelled on Sunday.