Aviation South Florida airports winding down operations with Irma approaching By Robert Silk / September 07, 2017 Share 1 -- Flights at Fort Lauderdale's airport will come to a halt at 7:45 p.m. on Friday with Category 5 Hurricane Irma barreling toward South Florida. The airport will remain closed through the weekend. Miami International plans to halt operations when winds reach a sustained speed of 35 miles per hour. American Airlines, the largest carrier in Miami, will halt arrivals to the airport beginning at 1 p.m. Friday. The airline will suspend flights out of Miami shortly before 4 p.m. Flights will be grounded throughout the weekend. American has also announced that it will follow a similar schedule in Fort Lauderdale, West Palm Beach and Fort Myers. The carrier will cease flight operations in Orlando at 2 p.m. Saturday.