The Federal Aviation Administration said on Friday it will close 149 air traffic control towers beginning on April 7 to meet required automatic spending cuts.
Another 40 towers previously slated for closure will remain open, the agency said in a statement.
"We heard from communities across the country about the importance of their towers and these were very tough decisions," transportation secretary Ray LaHood said. "Unfortunately we are faced with a series of difficult choices that we have to make to reach the required cuts under sequestration."
FAA administrator Michael Huerta said the agency would work with affected airports and operators to ensure procedures are in place to maintain a high level of safety.
The Associated Press reported towers slated to close are at smaller airports with lighter traffic, and all pilots are trained to land without help by communicating among themselves on a common radio frequency.