LOS ANGELES -- The daily new confirmed COVID-19 cases in the United States remain at a record high and the frequent travels made by Americans during the New Year holiday are considered one of the reasons for the surge.

The rapid spread of the Omicron variant has also led to a shortage in airline employees. Combined with wintry weather, the shortage has resulted in days of flight cancellations and delays.

As of 15:30 Eastern Standard Time (EST) on Tuesday, more than 1,400 inbound and outbound flights had been canceled and over 3,300 inbound and outbound flights had been delayed.

Flight cancellations and delays have continued for more than 10 days.

Since December 24, 2021, U.S. airlines have canceled more than 19,000 flights, according to a flight-tracking website. Many travelers have left stranded at airports after their travel plans were disrupted.

Airline company JetBlue on Tuesday canceled 107 flights, or 11 percent of its total for the day.

A JetBlue spokesperson said that many crew members had recently been infected with Omicron variant, and flights had to be canceled due to a shortage of personnel.

United Airlines recently reached an agreement with the pilot union to provide three times the salary to pilots who can work for most of January.

Some experts said that despite the shortage of personnel in airlines, there are still a large number of tourists flocking to the airports, coupled with the impact of bad weather, making the U.S. New Year holiday travel extremely chaotic.