WASHINGTON — President Donald Trump told airline and airport executives Thursday that he is interested in privatizing America’s air traffic control system and improving airports and roads, which he called obsolete.

Trump also promised to roll back government regulations and said he will announce a plan in the next three weeks to reduce taxes on businesses. But he sounded skeptical about raising fees that airline passengers pay to fund airport improvements.

One issue was notably absent during the White House meeting — Trump’s executive order to temporarily ban travel to the U.S. from seven mostly-Muslim countries. Airline leaders had criticized the order, which is on hold.

Airline and airport executives who emerged from the White House meeting called it a positive session.

Southwest Airlines CEO Gary Kelly told Trump the best way to help airlines would be to “modernize the air traffic control system.” He complained that money spent on the system has not improved it.

“I hear we’re spending billions and billions of dollars, it’s a system that’s totally out of whack,” Trump said.

Some airline executives and Republicans in Congress have proposed privatizing air traffic control because they say the Federal Aviation Administration has moved too slowly on modernization and would benefit by being removed from the uncertain congressional budget process.

Other lawmakers oppose reducing Congress’ oversight of aviation, and business and private aircraft owners worry their costs will go up.

Most countries separate air traffic control from aviation-safety agencies. But it is unusual to actually privatize air traffic operations.