FAA Proposes Ending 53-Year Ban on Overland Supersonic Flights

The Federal Aviation Administration (FAA) has proposed replacing its 53-year-old ban on civilian supersonic flights over domestic land with a noise-based framework. This regulatory shift could eventually cut passenger flight times between Los Angeles and New York from six hours to three.

Since 1973, federal law has made it a crime for commercial aircraft to exceed the speed of sound over American soil. While passenger planes became safer and more efficient over subsequent decades, they never grew faster because the regulation explicitly outlawed supersonic speeds.

The initial prohibition followed a series of controversial tests conducted during the 1960s. Government agencies flew supersonic military jets over Oklahoma City eight times a day for six months, which shattered windows, cracked plaster, and generated nearly 10,000 public complaints.

Following that public backlash, the regulatory body instituted a blanket ban on the speed itself. However, modern aerospace engineers have developed methods to manipulate how shockwaves travel through the atmosphere, effectively bending the sound away from the ground.

Atmospheric science shows that the speed of sound fluctuates depending on air temperature and altitude. By operating an aircraft at specific high altitudes and speeds under precise atmospheric conditions, the resulting shockwave bends upward and curves back into the sky.

Under this flight technique, the physical sonic boom still occurs, but it never reaches communities below. The National Aeronautics and Space Administration (NASA) measured the ground-level impact of these quiet supersonic designs, finding that they produce only a faint rumble.

Instruments recorded sound levels comparable to standard street noise, showing no structural risks like broken windows or cracked plaster. This scientific data prompted the regulatory update, which alters the core logic of overland flight restrictions.

Instead of restricting flight velocity, the proposed rule establishes a strict cap on the actual sound levels allowed to reach the ground. Aerospace companies that can keep their aircraft quiet will be permitted to fly as fast as their engines allow.

The private aviation firm Boom Supersonic demonstrated the viability of this methodology during a successful test flight last year. The company is currently developing commercial airliners designed to meet these new noise-mitigation standards.

During the previous era of faster-than-sound travel, a round-trip ticket on the Concorde cost approximately 12,000 dollars. Those flights were also legally restricted to ocean routes, meaning the aircraft had to slow down before entering domestic airspace.

The next generation of civil aircraft will be legally permitted to fly directly over residential homes without residents hearing the oncoming vehicle. The proposed framework aims to establish clear testing guidelines and pathways for eventual commercial certification.