(CNN Business) Three American airlines cancelled flights on Christmas Eve.
On Thursday, United Airlines (UAL) stated that it had to "cancel some flights" due to the Omicron variant of the coronavirus.
A United Airlines memo obtained by CNN stated: “This week’s surge in Omicron cases across the country has a direct impact on our crew and the operations staff who operate us.”
According to flight tracking website FlightAware, United Airlines has cancelled more than 150 flights.
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