Nov. 11 (UPI) -- Transportation Secretary Sean Duffy on Tuesday warned that the crisis facing air travel in the United States, exasperated by the ongoing government shutdown, is going to get worse unless Congress acts.

Speaking to reporters at Chicago O'Hare International Airport, Duffy said air travel will "radically slow down" as the country approaches the weekend if lawmakers don't vote to approve legislation that is before the House to fund the government through January.

"You're going to see this Friday, Saturday and Sunday -- big disruption thus far -- massively more disruption as we come into the weekend, if the government doesn't open," he said during the press conference.

The United States was grappling with a air traffic controller shortage before the government shutdown, but the situation deteriorated after federal funding lapsed, with most air traffic controllers required to work without pay.

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