Echoing Lantana airport officials, a business owner at the North County Airport in suburban Palm Beach Gardens said flight restrictions for President Donald Trump are devastating to small businesses at the suburban Palm Beach Gardens airport.

Marc Rossi is co-owner and business director for SunQuest Aviation Services, which offers flight training at the airport. Flight training and practicing are forbidden within the airfield’s airspace when Trump visits, which has been three weekends in a row now.

"For a school like ours, it’s a significant impact," Rossi said.

Pilots at the airport may continue to fly when the restrictions are in place if they file a flight plan with air traffic controllers at Palm Beach International Airport and enter an assigned code (called a "squawk" code) into their planes’ transponders.

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Flight instruction students could fly to another airport, do their training and fly back, but that would require additional time and money, Rossi and a hobby pilot said.

The Lantana airport, about 6½ miles south of Trump’s "winter White House," effectively shuts down during Trump’s visits. Last week, about two dozen people who own or operate businesses at the airport said that two straight weekend stays by the president have cost them thousands of dollars, and some of their customers have fled to other airports. The Witham Field Airport in Stuart, for example, is just outside the 30-nautical-mile outer ring of the temporary flight restrictions.

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At the North County Airport, about 21 miles from Mar-a-Lago, Rossi said the president’s visits cost his flight instruction and rental business, at minimum, $2,500 to $3,500 a day, or $5,000 a weekend. He said he already lost a flight Friday afternoon from a pilot who didn’t want to deal with the restrictions.

Organizers of the annual Aviation Day at the airport decided to postpone it from March to October to see if they could figure out a way to still be able to give airplane rides to kids, Rick Golightly, a Jupiter pilot, said.

The Experimental Aircraft Association’s Young Eagles program typically offers free plane rides for kids.

Pilots flying from the North County Airport to the Belle Glade Airport to offer flights to children there last weekend coordinated with PBIA, Golightly said.

"It worked really very smoothly," he said. "For that kind of event, it works fine."

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U.S. and state legislators have called on the Federal Aviation Administration and Gov. Rick Scott to talk to the Secret Service about reaching a compromise that will protect the president while mitigating the impact on local airport operations.

In a letter to FAA head Michael Huerta, Rossi suggested pilots who want only to practice at the airport follow a similar procedure to those who fly in and out.

A pilot who wants to stay in the airport’s airspace could file a flight plan indicating he or she would be "remaining in the pattern." Air Traffic Control could monitor the aircraft through the squawk code.

The FAA developed the temporary flight restriction for the airspace around Mar-a-Lago and PBIA at the Secret Service’s request, and that agency has been unflinching. The Secret Service did not return phone messages seeking comment.

It’s not only flight instruction students who practice on the airport’s grounds. Most pilots renting planes, especially Piper Cubs and other models with wheels on the tail rather than the nose, like to rehearse taking off and landing on the grass because it requires more skill. That’s a no-no, too, when the president is at Mar-a-Lago, Rossi said.

Also, pilots who fly using visual flight rules aren’t used to working with air traffic control. And if air traffic controllers are too busy when a pilot wants to fly back into the North County Airport, they can theoretically prevent him or her from returning, Rossi said.

Many pilots haven’t flown far enough that they’d file a flight plan and are afraid of running afoul of the new rules, Golightly said.

"For our local pleasure flying, short-term flying, there are a lot of people who don’t want to take a chance and jeopardize their license or (risk) getting a fine," he said.

Typically, SunQuest would have 10 to 13 rental flights on a clear Sunday afternoon. Last week when Trump was in town, they had none, Rossi said.

"Our rental business on the weekends has basically dropped to zero," he said. "If this goes on every weekend, basically, that’s unsustainable for us."