Live updates: Delays, cancellations hit SFO, OAK after FAA's 10% flight reduction

San Francisco International Airport reported 301 delays and 48 cancellations on Sunday afternoon.

SFO told ABC7 News that's high for a typical Sunday.

As of Sunday morning, more than 1700 flights were canceled in the U.S. and at least 5,700 have been delayed, according to flight tracking website FlightAware.

Transportation Secretary Sean Duffy expects it to get even worse.

"I look to you know the two weeks before Thanksgiving, you're going to see air travel be reduced to a trickle. We have a number of people who want to get home for the holidays, they want to see their family, they want to celebrate this great American holiday. Listen, many them are not going to be able to get on an airplane, because there are not going to be that many flights that fly," he said.

Meanwhile Oakland's airport told ABC7 News it was pretty normal with only 6 cancellations and 40 delays.

U.S. airlines have canceled more than 2,500 weekend flights mostly because of the government shutdown and the Federal Aviation Administration's order to reduce air traffic.

The slowdown at 40 of the nation's busiest airports will head into its third day Sunday. So far there have not been any widespread disruptions.

FlightAware reports that cancellations jumped Saturday to more than 1,500, following just over 1,000 the previous day.

By Saturday evening airlines already had canceled another 1,000-plus Sunday flights.

Flight delays and cancellations continued at Bay Area Airports on Saturday. More than 900 flights have been canceled nationwide this weekend, as the FAA limits flight capacity at 40 major airports during the government shutdown.

Flight delays and cancellations continued at Bay Area Airports on Saturday. More than 900 flights have been canceled nationwide this weekend, as the FAA limits flight capacity at 40 major airports during the government shutdown.

Many travelers are feeling frustrated.

"We've been here six weeks, New Orleans, Route 66 for 26 days," said Annette Mitchell.

Annette and Glenn Mitchell from Australia are wrapping up a vacation of a lifetime, too bad it's not ending the way they'd hoped due to the U.S. government shutdown.

"It's a sickness in the stomach wondering if we're going to get a flight or not," said Annette Mitchell.

The Mitchell's flight to LAX is one of about 35 flights cancelled Saturday, according to the SFO's duty manager, to help ease pressure on the embattled U.S. air traffic control system. The Mitchell's are checking the boards for a backup plan. They need to make their connecting flight back to Australia on Saturday night.

"Our fourth option is to grab a rent-a-car and shoot back down to LA, but that went out the window when we came here and waited for the good news," said Glenn Mitchell.

Ray Vidrio is heading to JFK, but flight delays are only compounding the situation.

"I feel bad too. I've been patient with everyone. A lot of flights have been canceled, rerouted, and delayed. It's tough to travel right now," said Vidrio.

Transportation Secretary Sean Duffy insists the drastic cuts are to relieve pressure, as air traffic controllers work without pay and more call out sick.

"Some people have second-guessed what we've done; we have not politicized the airplace, we've been working hard to make sure that there's minimal disruption to the best of our ability and still keep it safe," said Duffy.

Flight cancellations mean a four percent reduction this weekend, but Duffy says the FAA will continue to reduce flights by ten percent across 40 airports until the government shutdown ends.

"Frustrating and inconvenient for passengers," said traveler Rhoda Mondes.

This week, most airlines are trying to accommodate passenger travel plans without change fees.

Best advice, if you're traveling, check with your carrier for the latest information before heading to the airport.

More than 1,000 flights have been canceled nationwide on Saturday as the Federal Aviation Administration continues limiting flight capacity at 40 major U.S. airports amid the government shutdown.

As of 12:30 p.m. PT on Saturday, 1,048 flights have already been canceled nationwide and over 4,000 flight delays. This eclipses Friday's toll of 1,024 cancelations.

Major delays at airports across the country continue to persist due to staffing issues in air traffic controller towers and centers.

There are 25 air traffic control staffing triggers Saturday afternoon, a ground stop in Nashville and multiple ground delays due to staffing at airports across the country.

SFO reported just before 8 a.m., "Departures to San Francisco International are delayed avg. 114 mins. due to other. Delay assigned to departures within 1950 nautical miles." But it's unclear if it's related the FAA flight reductions or the fog.

Check-in with your carrier for the latest info.

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ABC7 News contributed to this report.