The 1973 ban on civil supersonic flight over US land is officially gone. Executive Order 14304 directed the FAA to replace it. But “gone” doesn’t mean “flyable.” The replacement standard — a proposed maximum boom overpressure of 0.11 pounds per square foot — was still just a proposal as of late August 2026, according to BakerHostetler.
No aircraft program has published data proving it can meet that number. Until the rule is final, overland supersonic flight remains effectively off-limits.
The headline said the 52-year ban was over. The fine print said something closer to: check back in two years, and maybe bring a noise meter.
Executive Order 14304 did something real. It told the Federal Aviation Administration to scrap the categorical prohibition on civil supersonic flight over US land and build a replacement based on how much boom actually reaches the ground. What it didn’t do was open a door. No aircraft — not Boom’s Overture, not NASA’s X‑59 — can legally fly supersonic over Omaha today.
That missing door is the point. The FAA’s replacement standard, a ceiling on boom overpressure, was still a proposal as of late August 2026. The agency’s own notice concedes it lacks the integrated data to define a tolerable boom. No operational program has published verified numbers showing routine cruise booms under that threshold.
The ban is repealed in principle. The rulebook doesn’t exist yet. That’s not a paperwork delay — it’s the difference between a policy goal and an operating permit.
24 months to write a rulebook. The rule is still a draft.
Executive Order 14304 set a 24-month clock for the FAA to finalize two things: a future standard for takeoff and landing noise, and an interim noise-based certification rule for en-route operations — the cruise phase that matters for flying over land.
What the FAA delivered was a proposal, not a rule. The Enabling Supersonic Overland Flight notice of proposed rulemaking appeared on July 2, 2026. Comments closed August 17. As of late August 2026, the rule still sat on the agency’s proposed-rule list.
That delay matters because the executive order repealed the categorical ban in principle, not in practice. The performance-based standard is what actually unlocks a permit. Until it’s final, the old prohibition’s practical effect stands. The headline “ban lifted” describes intent, not legal reality.
0.11 psf: a number from quiet wind, not boom history
The threshold has a bookish origin. The FAA derived 0.11 psf from NASA’s FaINT study and a 1980 Volpe secondary-boom report. Those didn’t measure what people find tolerable in a boom. They identified surface conditions where only evanescent waves and inaudible secondary booms would remain — a boom so attenuated it essentially disappears.
The FAA’s own notice admits the problem: a “lack of integrated metric data available to determine a tolerable level of sonic boom,” as FlightGlobal reported. That’s the regulatory equivalent of a shrug.
Then there’s the compliance gap. Under the FAA’s proposal to replace the categorical ban, operators pick their method — computer modeling or direct measurement — and the agency reviews each airframe individually. No blanket approval.
That’s where the uncertainty concentrates. Boom talks about running Overture in Mach cutoff. NASA’s X‑59 targets a quiet thump. But neither program has published verified operational data showing routine overland cruise booms at or below 0.11 psf. That absence is the core of every future fight.
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The Oklahoma City 1,253-boom lesson no one wants to repeat
The caution around 0.11 psf isn’t theoretical. It traces to the last time Americans lived under daily booms.
In February 1964, the Air Force began Operation Bongo II, flying repeated supersonic passes over Oklahoma City to gauge public tolerance. Over roughly six months, residents endured between 1,200 and 1,253 sonic booms — up to eight a day. The damage response was staggering: 9,594 complaints and 4,629 formal claims. Lawsuits followed, including Bennett v. United States.
The survey numbers were almost contradictory. A NORC poll found 73% of respondents said they could learn to live indefinitely with eight booms each day. About a quarter said they couldn’t. That minority wasn’t a rounding error. It helped cement the 1973 federal ban.
Fifty years later, NASA’s X‑59 aims for something quieter: a boom no louder than 75 PLdB, according to NASA. QSF18 data ties that level to about 1% of participants being highly annoyed. Next to Oklahoma City’s window-rattling, the new standard targets what the FAA calls a barely audible street-level rumble. Whether any operational aircraft can hit that in routine cruise remains unproven.
How a sonic boom gets judged under NEPA
The 0.11 psf ceiling has a second, less-discussed test: environmental review under NEPA.
Under FAA Order 1050.1G, impulsive noise — and a sonic boom is exactly that — becomes significant when cumulative exposure reaches 60 CDNL, equivalent to a day-night average of 65 dBA. Or when an action adds at least 1.5 dB to levels already at that line.
Cross that threshold and a full Environmental Impact Statement becomes likely. Stay below it and a categorical exclusion can apply. A separate August 24, 2026 FAA notice adopted a Department of the Air Force categorical exclusion for supersonic operations above 30,000 feet MSL over land, and over water above 10,000 feet MSL and more than 15 nautical miles from land. That’s narrower than it sounds: it covers pre-certification test flights, not the operations the rule would eventually permit. DLA Piper’s aviation team has already flagged the move as likely to draw comments and litigation.
The NPRM’s own language adds to the fragility. It concedes no dose–response dataset defines annoyance for booms like these. A threshold without a dose-response anchor is thin science — and litigants love thin.
What this means for you: no supersonic booking in the near future
You can’t book an overland supersonic flight, and you won’t be able to for years.
The FAA’s NPRM was published in July 2026 with comments closed August 17. The 24-month clock from the executive order runs to mid-2027. Finalizing a rule is one thing. Surviving NEPA review and potential litigation is another. The earliest a finalized standard could realistically clear both is mid-2027 at best — and that assumes no legal challenge slows things further.
Even then, no operator has demonstrated routine compliance with 0.11 psf. NASA’s X‑59 is a technology demonstrator, not a passenger aircraft. Boom’s Overture is a design and a set of test plans, not a certified airframe. Neither has published operational boom data meeting the FAA’s draft threshold.
On the international side, the 2029 ICAO landing-and-takeoff standard gives supersonic aircraft an airport-noise baseline. That’s a different problem from en-route booms. Until the US finalizes its national rule — and until someone proves an aircraft can meet it — Western travelers should assume the practical answer hasn’t changed since 1973.
Questions? Answers.
Are civilians allowed to fly supersonic?
Civilians cannot fly supersonic over US land. The FAA’s proposed 0.11 psf overpressure ceiling was still a proposal as of late August 2026, not a finalized rule.
Will the supersonic flight ever come back?
Overland supersonic flight depends on the FAA finalizing its noise-based rule. Executive Order 14304 set a 24-month deadline from June 2025, but the 0.11 psf proposal was still pending as of late August 2026.
Are Concorde jets coming back?
No manufacturer has a Concorde replacement in service. No aircraft program has published verified data showing routine overland cruise booms at or below the proposed 0.11 psf threshold, and ICAO has not adopted a global en-route boom limit.
