(This story was updated to add new information.)
Check your flights. There will be cancellations at dozens of major airports starting Friday, Nov. 7, due to the ongoing government shutdown, and several Florida airports have been affected.
More than 110 flights in Florida have been canceled as of 2:30 p.m. Friday and nearly 600 delayed flights, according to the live tracking site FlightAware. Most of them are at the larger airports in Orlando, Fort Lauderdale, Miami and Tampa.
Nationwide, at least 860 flights within, into or out of the United States have been cancelled so far Friday. More than 3,000 more flights have been delayed.
On Wednesday, Nov. 5, the day the government shutdown broke the record for the longest in U.S. history, Transportation Secretary Sean Duffy announced in a news conference that there will be a 10% reduction in flights at 40 major airports at the end of the week. The move is intended to help alleviate mounting pressure on air traffic controllers, who have not been paid since Oct. 1 and have been working long hours six days a week.
"I think it's going to lead to more cancellations, but we are going to work with the airlines to do this in a systematic way," Duffy said, adding that decisions would be based on pressure and not quantity of flights at each airport.
By Friday, Duffy was saying it could go up to 15%.
Weather has also been an issue, and an Arctic blast expected to blanket much of the eastern half of the United States with frost and snow starting this weekend won't help.
Even parts of Florida are expected to see the first frost of the season by Monday, weeks before normal.
How will this affect Florida flights, and what can you do about yours?
Will flights be canceled at Florida airports?
An official list has not been released. However, ABC News and CBS News have revealed a proposed list, citing anonymous sources, including the following Florida airports:
The list is not final and could change. USA TODAY has reached out to the U.S. Department of Transportation and the FAA. See the full list below.
How do I check if my flight is canceled?
Don't wait until you're already at the airport to check your flight. Monitor your flight early and often, starting days before, as cancellations could increase as the shutdown continues.
Download your airline’s mobile app and turn on push and text notifications for alerts about your flight. Some apps have a “Where’s My Plane?” feature, which lets you see if the aircraft scheduled to operate your flight has arrived, is delayed en route, or hasn’t departed yet from its previous airport. That can be an early signal of trouble.
What should you do if your flight is delayed or canceled? Latest on rebooking, refunds
If your flight is canceled, use the airlines' mobile app to rebook as soon as possible, according to Scott Keyes, founder of Going. If you need to talk to someone, Keyes suggests calling one of the carrier’s international lines.
"The best thing travelers can do is to be as proactive as possible switching to a new flight,” Keyes told USA TODAY. “When a flight gets canceled, all of a sudden hundreds of passengers need new itineraries. There may only be a handful of seats left on the best flights, and it's a first-come, first-(served) endeavor.”
If your flight is canceled for any reason, including a shortage of air traffic controllers, you’re entitled to a full refund if you choose not to fly on alternative itineraries offered by your airline. The same goes for “significant” delays or changes.
United Airlines CEO has promised refunds for customers who do not want to fly while the reductions are in effect, "even if their flight isn't impacted." Delta has set up a travel waiver for customers to rebook without change fees.
How many airline delays, cancellations reported into and out of US Nov. 7?
According to FlightAware.com, which provides real-time flight information, as of 8:15 a.m. the following delays and cancellations of flights have been reported within, into or out of the United States today, Nov. 7:
How many delays, cancellations reported at Florida airports?
Here's the breakdown by airport as of 2:30 p.m. Nov. 7:
DAB, Daytona Beach International Airport
ECP, Northwest Florida Beaches International Airport
EYW, Key West International Airport
FLL, Fort Lauderdale-Hollywood International Airport
GNV, Gainesville Regional Airport
JAX, Jacksonville International Airport
MCO, Orlando International Airport
MIA, Miami International Airport
MLB, Melbourne Orlando International Airport
PBI, West Palm Beach International Airport
PIE, St. Pete-Clearwater International Airport
PGD, Punta Gorda Airport
PNS, Pensacola International Airport
RSW, Southwest Florida International Airport
What about RSW in Fort Myers?
SFB, Orlando Sanford International Airport
SRQ, Sarasota Bradenton International Airport
TLH, Tallahassee International Airport
TPA, Tampa International Airport
VPS, Destin-Fort Walton Beach Airport
How long will security lines be? How early should your arrive for airport screening?
TSA Coordinator Adam Stahl, in an interview with ABC News Live, recommended travelers continue to arrive at the airport two to two and a half hours prior to their departure of their domestic flight.
"There have been isolated impacts in wait times and we expect those to increase" until the shutdown is resolved, Stahl said.
As always, "be patient and respectful."
If your flight is affected by shutdown, can you get a refund?
FAA staffing is seen as outside of an airline’s control, so carriers aren’t on the hook in the same way they would be for delays caused by mechanical issues or other problems on their end.
If your flight is canceled for any reason, including a shortage of air traffic controllers, you are entitled to a full refund if you choose not to fly on alternative itineraries offered by the airline.
Which airports will see cancelled flights?
The unofficial list of affected airports, which may change, is:
Contributing: N'dea Yancey-Bragg, Kathryn Palmer, Kathleen Wong, Zach Wichter, Trevor Hughes, Marc Ramirez, USA TODAY
(This story was updated to add new information.)