May 18, 2026
A U.S. executive boards a private jet in 2026 for a same-day New York-to-Los Angeles board meeting. The cabin feels simple; the legal structure behind that trip is not. Part 91, under Title 14 CFR, is the backbone for non-commercial private aircraft flying in the United States, including personal, corporate, and many fractional flights. Part 91 is designed for non-commercial operations, meaning no compensation can be received for flights, while Part 135 allows for commercial operations where passengers can be charged for travel.
This guide is designed for private jet users, owners, and executives who need to understand the legal and operational framework governing non-commercial private flights in the U.S. Knowing the differences between Part 91 and Part 135 is essential for making informed decisions about aircraft ownership, charter, and compliance.
Understanding Part 91 versus Part 135 matters before choosing between different forms of aviation operations, such as private jet ownership, fractional aircraft ownership, jet card programs, or charter, each governed by distinct regulations.
Part 91 is the section of the Federal Aviation Regulations that provides general operating and flight rules for civil aircraft, specifically for non-commercial operations where no compensation is involved for carriage of passengers or cargo.
Part 91 offers flexibility, but the owner or operator usually carries operational control, responsibility, liability, and compliance risk.
Part 135 applies to paid charter flights and requires air carrier certificates, stricter pilot qualifications, maintenance, identification checks, and rest requirements. Operators must also obtain a commercial certificate from the FAA to legally provide paid transportation services.
BlackJet Fractional Jet Ownership helps clients structure private aviation access through Equity Fleet and Reserve Fleet models aligned with Part 91 and Part 135.
The Federal Aviation Administration organizes federal regulations into numbered “Parts.” Part 61 covers pilot certification, Part 91 covers general operating and flight rules, Part 135 covers on-demand charter and commuter air transportation, and Part 121 covers scheduled airlines.
This structure helps pilots, owners, and operators identify which rules apply without reading every aviation regulation. For high-net-worth travelers, the practical issue is simple: is the trip private, commercial, or a hybrid structure?
Part 91 applies when no payment, compensation, or hire is received for carrying passengers or cargo. Examples include a CEO flying from New York to Chicago on a company aircraft or a family flying to Aspen on a private aircraft.
Part 91 still requires safety compliance: airworthiness, fuel reserves, minimum safe altitudes, IFR/VFR procedures, and pilot qualifications. Cost sharing is limited to pro rata reimbursement of direct costs; if the structure resembles a charter, Part 135 may apply. Insurance coverage under Part 91 can be voided if the aircraft is used in a way that appears to be commercial.
Part 91 is flexible, but not casual. The Pilot in Command (PIC) holds ultimate authority and responsibility for the safety and operation of the flight under Part 91. The PIC is required to ensure that all passengers are briefed on safety protocols, including the use of safety belts and other safety equipment. Part 91 emphasizes preflight action: the PIC must review weather, fuel requirements, airport data, alternates, and NOTAMs before the trip.
Aircraft owners/operators must maintain their aircraft in an airworthy condition and comply with FAA Airworthiness Directives (ADs). Pilots under Part 91 must complete a flight review every 24 months to maintain flight currency. Pilots must not operate an aircraft within 8 hours of consuming alcohol or with a blood alcohol concentration of 0.04% or higher under Part 91 regulations.
Aircraft must comply with specific equipment and communication requirements to enter various airspace classes as defined by Part 91, including ADS-B and transponder rules. Part 91 establishes explicit flight procedures under Visual Flight Rules and Instrument Flight Rules, including minimum safe altitudes and cloud clearance criteria. Part 91 also includes regulations for handling and carriage of hazardous materials, including specific training requirements.
Operators under Part 91 benefit from reduced administrative oversight and fewer regulatory inspections compared to commercial air carriers. However, insurance coverage under Part 91 can be voided if the aircraft is used in a way that appears commercial, so owners must carefully manage how their aircraft is operated to maintain coverage.
Part 135 regulations govern non-scheduled, commercial aircraft travel, such as private air charters or air taxi flights, which require payment for the service. To operate under Part 135, an operator must obtain an Air Carrier Certificate and follow strict operational guidelines set by the FAA, including maintenance and safety standards. Clients can expect higher safety and service standards when flying under Part 135 due to these stricter regulatory requirements.
Part 135 allows commercial operations where paying passengers can be charged for travel. Under Part 135, there are stricter regulations regarding pilot qualifications, including mandatory drug and alcohol testing, which are not required under Part 91. Part 135 requires passenger identification checks for flights; passengers flying under Part 135 must present government-issued photo identification, including passengers aged 18 and older, unlike Part 91 operations, where identification is not typically required for domestic flights within the U.S. Due to the commercial nature of operations, Part 135 also requires higher insurance coverage to protect operators and passengers.
The same aircraft can operate under Part 91 for owner flights and Part 135 for charter, but the differences are material:
Aspect | Part 91 (Non-Commercial) | Part 135 (Commercial) |
|---|---|---|
Operational Control | Owner/operator assumes full control and liability | Charter operator holds control and liability |
Compensation | No payment or hire allowed for carriage | Payment allowed; commercial operations |
Pilot Qualifications | Less stringent; no mandatory drug/alcohol testing | Stricter qualifications; mandatory drug/alcohol testing |
Pilot Duty & Rest | No specific FAA rest requirements | Mandatory flight-duty time and rest regulations |
Maintenance Standards | Standard FAA requirements | Higher maintenance standards and additional equipment |
Passenger Identification | Not required for domestic flights | Government-issued ID required for passengers 18 and older |
Airport Access & Weather | More flexible; can use remote airports without weather | Restricted to airports with weather reporting and buffers |
Insurance | Lower coverage; risk on the owner | Higher coverage due to commercial nature |
Regulatory Oversight | Reduced FAA inspections and administrative oversight | Stricter FAA oversight, documentation, and compliance |
Breaking the rules by operating flights outside the appropriate regulatory framework can result in significant legal and safety consequences.
Many aircraft ownership plans use Part 91 for personal use and Part 135 when chartering to third parties, which can influence how fractional jet ownership is financed.
Operational control means legal authority to initiate, conduct, and terminate flights. Under Part 91, the aircraft owner assumes full liability for operations, while under Part 135, the charter operator takes on the legal and safety responsibilities, providing a liability buffer for the owner.
BlackJet Fractional Jet Ownership defines operational control clearly in each plan so clients know who is involved, who must comply, and where legal responsibility sits, much like a well-drafted aircraft fractional ownership contract.
Part 91 allows operational flexibility without rigid scheduling, including flying to remote airports lacking weather services. While Part 91 operations allow more flexibility, such as the ability to take off under conditions of zero visibility—which is not permitted under Part 135 regulations—operators must always consider the aircraft's performance limitations when planning takeoff and landing, ensuring safe runway length and operational parameters, in addition to evaluating crew readiness and destination conditions.
Part 135 imposes stricter commercial standards, alternate rules, and weather procedures. This can limit airports, but creates a higher standard for paid passengers.
Part 135 operations require adherence to specific flight-duty-time and rest requirements for pilots, while Part 91 does not impose such strict regulations on pilot rest periods. Part 135 requires that pilots and flight crews adhere to specific flight-duty-time and rest requirements to ensure safety and prevent fatigue, which is more stringent than the requirements under Part 91.
Reputable private aviation providers apply disciplined pilot training, fatigue guidelines, and scheduling controls even when a flight is operating under Part 91.
Aircraft operated under Part 135 must meet higher maintenance standards and may require additional equipment compared to those operated under Part 91. Part 135 maintenance involves more documentation, FAA oversight, and recurring inspection programs.
Under Part 91, maintaining dispatch reliability depends heavily on the owner’s management process. In fractional programs, clear contract terms are also critical when selling a fractional jet ownership share, and professional maintenance tracking protects safety, cost predictability, and residual value.
Whole ownership, corporate flight departments, and fractional jet ownership commonly use Part 91 for owner flights. For many travelers, top fractional jet ownership programs offer a cost-effective way to access private aviation while still benefiting from these operational advantages. This enables customized schedules, privacy, flexible airport access, and internal company policies above minimum rules.
Fractional owners generally fly under Part 91 when using their own share. Membership programs may blend Part 91 and Part 135 depending on whether flights are owner-based or provided by a charter operator.
BlackJet Fractional Jet Ownership structures private aviation solutions for U.S. and international travelers, with expertise across Part 91 and Part 135. Equity Fleet focuses on fractional aircraft ownership, where owner flights are generally Part 91 with professional crew, centralized scheduling, and clear visibility into total ownership cost.
Reserve Fleet offers flexible access without ownership, similar to floating fleet options in fractional ownership, and may use vetted Part 135 charter partners. BlackJet coordinates maintenance, compliance, operating documents, and trip planning so each flight follows the correct regulations.
This is not tax advice, but structure affects private jet cost. Operating under Part 135 can mitigate exposure to sales, use, and property taxes, and may offer federal tax benefits, while Part 91 operations have limited compensation options and potential tax implications.
Part 135 adds compliance cost but can support charter revenue. Part 91 gives control, but the owner carries more direct liability, making insurance and professional management essential.
A 50-hour-per-year executive may prefer a Part 91-focused fractional share. A 150-hour corporate user may plan a blended strategy: Part 91 for internal flights and Part 135 charter when the aircraft is idle.
The best structure considers routes, airports, passengers, safety culture, cost of fractional ownership, and how much responsibility the owner wants on every trip.
Not necessarily. Safety depends on the operator’s culture, pilot training, maintenance, and oversight. Part 135 has more prescriptive minimums, while professionally managed Part 91 programs often voluntarily use similar standards.
Yes. A private jet may fly owner missions under Part 91 and charter flights under Part 135 if the aircraft is on the proper certificate and the operator completes the required certification and documentation.
Part 91 still applies to a U.S.-registered aircraft, but international civil aviation rules, permits, customs, immigration, and foreign airport procedures also apply. Global flying requires complete coordination.
Ask which regulation applies, who has operational control, and whether the trip involves charter payment. If non-owner passengers are paid customers, the flight is generally Part 135.
Review annual hours, routes, aircraft preferences, tax goals, and risk tolerance. BlackJet Fractional Jet Ownership can compare Part 91, Part 135, and hybrid options. Visit FractionalJetOwnership.com to request a confidential consultation and build a compliant private aviation plan.
Understanding the distinctions between FAA Part 91 and Part 135 is crucial for anyone considering private jet ownership or fractional aircraft programs. Part 91 offers operational flexibility, full control, and privacy for non-commercial flights, while Part 135 provides a regulated framework for commercial charters with enhanced safety, liability protections, and potential tax benefits. Choosing the right operating model depends on your travel needs, usage patterns, and risk tolerance.
BlackJet Fractional Jet Ownership specializes in guiding clients through these complex regulatory environments, offering tailored solutions through Equity Fleet and Reserve Fleet models that align with your mission and preferences. Whether you seek the autonomy of Part 91 operations or the commercial advantages of Part 135, expert advice and professional management ensure safety, compliance, and efficiency.
Ready to explore the smarter way to fly private? Visit FractionalJetOwnership.com to learn how fractional ownership can transform your travel experience and provide unparalleled access to private aviation.
