More than 2,300 US flights canceled Sunday amid bad weather and Covid

Cancelations follow Saturday's of more than 2,700 US flights, frustrating travelers during the holidays

Wintry weather and the coronavirus pandemic frustrated US travelers as return flights from holidays were canceled or delayed in the first days of the new year.

By early afternoon on Sunday, more than 2,300 US flights and more than 3,900 worldwide had been canceled, according to tracking service FlightAware.