US airlines called off more than 1,000 flights on Sunday as crews were grounded amid surging Covid-19 infections, causing misery for thousands of Christmas travelers.
Commercial airlines had canceled 1,001 flights within, into or out of the US by mid-afternoon, according to the flight-tracking website FlightAware.com.
It was a third straight day of traveling pain and more cancellations were likely as Covid infections soar, driven by the highly transmissible Omicron variant.
A total of 997 flights
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