Air passengers could face travel Armageddon over the weekend if the government shutdown doesn’t end by then, Transportation Sec. Sean Duffy cautioned Tuesday.

More than 10% of flights could be delayed nationally , Duffy warned – adding that some airlines may even decide to ground their fleets altogether.

“You may find airlines that stop flying. Full stop,” Duffy said.

And last weekend’s travel delays – which saw thousands of flights canceled and scores more delayed – would be “tiddlywinks” compared to what could happen between Friday and Monday if the government isn’t open again, Duffy said.

Duffy warned that 10% of US flights could be canceled. Getty Images

Air traffic controllers have been calling in sick to work in droves as the shutdown continued over the weekend and reached

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