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Ronald Reagan Washington National Airport on Dec. 27. Photo: Anna Moneymaker/Getty Images

Some 4,700 domestic flights were canceled over New Year's weekend, with poor weather conditions contributing to delays already exacerbated by the Omicron variant.

The latest: A total of 2,529 flights going within, into and out of the U.S. were canceled on Sunday as of 5 p.m, according to tracking service FlightAware. More than 6,000 were delayed.

  • A total of 2,749 domestic flights were canceled Saturday.
  • More than 4,000 flights around the world were cancelled Sunday, with another 11,200 delayed, per Reuters.

Pandemic-related staff shortages had already created record-high cancellations.

  • More than 12,000 flights were axed between Christmas Eve and New Year's Day, according to ABC News.

The state of play: The Federal Aviation Administration released a notice on Friday, warning travelers that they should expect delays to continue due to COVID-related staffing shortages.

  • "To maintain safety, traffic volume at some facilities could be reduced, which might result in delays during busy periods," the FAA said.

Go deeper

Jan 13, 2022 - World

Biden administration criticizes China's move to cancel more flights

United Airlines flights are among the latests to be suspended. Photo: Elijah Nouvelage/Bloomberg via Getty Images

The White House criticized China's decision to cancel more flights from the U.S. on Wednesday, saying it was "inconsistent with its obligations under the U.S.-China Air Transport Agreement."

Driving the news: China announced it suspended six flights over the course of the next week due to passengers testing positive for COVID-19, per Reuters.

United Airlines: Employee deaths dropped to zero after vaccine mandate

Photo: Daniel Karmann/picture alliance via Getty Images

Since United Airlines' COVID-19 vaccine mandate went into effect last summer, no employee has died, CEO Scott Kirby said in a letter to employees.

Driving the news: Kirby said that prior to the vaccine mandate, "tragically, more than one United employee on average *per week* was dying from COVID,” but "we’ve now gone eight straight weeks with zero COVID-related deaths among our vaccinated employees."

Federal judge blocks Biden's vaccine mandate for federal workers

President Biden speaking from Eisenhower Executive Office Building on Jan. 21. Photo: Yuri Gripas/Abaca/Bloomberg via Getty Images

A federal judge in Texas blocked the Biden administration from enforcing its coronavirus vaccine mandate for federal workers on Friday, citing the outcome of last week's Supreme Court ruling that nullified the administration's vaccine-or-test requirement for large employers.

Why it matters: It's a blow to President Biden's efforts to increase the U.S.' vaccination rates, though much of the federal workforce has already been vaccinated against the virus.

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