FAA Proposes Ending 53-Year Overland Supersonic Flight Ban

Regulatory Shift for Commercial Supersonic Travel

The US Federal Aviation Administration (FAA) is clearing the way for the return of commercial supersonic air travel by revamping regulations for faster-than-sound aircraft. The FAA issued a Notice of Proposed Rulemaking (NPRM) to replace its 53-year-old overland supersonic ban with performance-based noise limits. This official regulatory step aims to modernize the aviation landscape by shifting from blanket speed prohibitions to acoustic certification standards.

The Path to Repealing the 1973 Ban

The proposed rule, titled "Enabling Supersonic Overland Flight" (Docket No. FAA-2026-6935), targets the 1973 prohibition on civil aircraft exceeding Mach 1 over U.S. land. The FAA now proposes to replace this absolute ban with an interim noise-based certification standard. Under the new proposal, manufacturers must demonstrate that their aircraft produce a maximum sonic boom overpressure at the surface of no more than 0.11 pounds per square foot (psf). This threshold is designed to mitigate the disruptive impact of traditional sonic booms, which historically measured approximately 2.0 psf for legacy aircraft like the Concorde.

Stakeholder and Technical Implications

For Supersonic Transport (SST) manufacturers such as Boom Supersonic, the regulation provides a necessary pathway to certify aircraft for domestic overland routes. FAA Administrator Bryan Bedford noted that advancements in materials science and noise reduction now allow for the repeal of the legacy ban while protecting communities. However, the proposal has drawn scrutiny from environmental advocates. According to researcher Dan Rutherford, the 0.11 psf limit relies on a physical metric that may not fully account for human physiological responses to impulsive noise.

Ground-Level Acoustic Impact (Overpressure)

Technical Analysis: The Acoustic Shift

The move toward performance-based standards represents a fundamental shift in how the FAA manages high-speed aviation. Historically, the 1973 ban effectively stifled the commercial viability of the Concorde by limiting it to trans-oceanic routes. The new proposal acknowledges that modern aircraft shaping and the use of the Mach Cutoff (MCO) technique—which leverages atmospheric conditions to refract shock waves upward—can reduce sonic booms to a manageable "sonic thump." This transition follows a broader industry trend of moving away from arbitrary speed-based restrictions toward measurable environmental outcomes, positioning supersonic flight as a viable competitor for premium transcontinental markets.

Timeline for Certification and Finalization

The FAA has opened a 45-day public comment period for the NPRM, which is scheduled to conclude on August 17, 2026. Following this period, the agency intends to finalize the interim noise-based certification standard for overland cruise by mid-2027. Additionally, the FAA is expected to propose separate landing and takeoff noise standards for supersonic aircraft by late 2026.

Why This Matters for the Industry

This regulatory update serves as the critical gatekeeper for the next generation of supersonic commercial travel. By providing a quantifiable noise threshold, the FAA offers manufacturers the regulatory certainty required to secure investment and finalize aircraft designs. For the aviation industry, this signifies the potential reopening of lucrative domestic routes that have been restricted for over half a century.