Dozens of flights are canceled at Philadelphia International Airport on Friday after an FAA-ordered cut in air traffic at the nation's 40 busiest airports .

This is part of the FAA phasing in flight cancellations at PHL and the other top 40 airports , eventually reaching the full 10% reduction next week.

As of 12 p.m. Friday, there were 30 flight cancellations and 37 delays at PHL, according to FlightAware .

Transportation Secretary Sean Duffy said the reduction in air traffic would reduce pressure on air traffic controllers, who have been working without pay during the government shutdown.

Airlines have been scrambling to comply. Around 6:30 a.m. ET, about 30 minutes after the cutbacks began at 6 a.m., there were already over 800 flight cancellations nationwide and over 56

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