A reduction in U.S. flight volume began early Friday as the Federal Aviation Administration works to alleviate pressure on the aviation industry amid the ongoing government shutdown.

As of early Friday, 818 flights in the U.S. had been canceled, according to FlightAware.com. On Thursday, the website reported 201 cancellations.

The FAA said about 10% of domestic flights would be canceled this weekend. Officials said the shutdown has led to a growing number of air traffic controllers calling in sick. Air traffic controllers are among essential government employees required to continue working despite going weeks without a paycheck.

Officials said reductions will occur at 40 airports. Scripps News published a full list of affected airports on Thursdsay.

Airlines announce flight reduction

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