This Reddit query touches on a foundational planning question that many career-track pilots wrestle with early in flight training: how to structure cross-country flying to satisfy multiple certificate requirements simultaneously rather than treating each rating as a siloed hour-building exercise. Under 14 CFR Part 61, the answer is generally yes—a single flight can be logged toward several requirements at once, provided it meets the specific criteria for each. The instrument rating's Part 61.65 requires 50 hours of PIC cross-country time, while the commercial certificate under 61.129 has its own cross-country provisions, including a long dual cross-country and a specific solo (or PIC) cross-country of at least 300 nautical miles with landings at three points, one leg at least 250 nm from origin. As long as the flights are flown while the pilot holds the appropriate certificate privileges (PIC time requires at least a private certificate and category/class rating, and the aircraft/route must meet the mileage and landing criteria), the same flight hours can count toward both the instrument PIC cross-country total and the commercial cross-country requirements.
For working and aspiring professional pilots, this kind of efficient dual-purpose planning is not just a curiosity—it's a financial and time-management necessity. Flight training costs have risen sharply industry-wide, with aircraft rental, instructor fees, and fuel prices squeezing budgets for Part 61 students who are often self-funding their path to the airlines or corporate flying without the structured (and pricier) syllabus of a Part 141 academy. Every flight hour that can be logged toward two or three requirements at once—say, a 300+ nm solo cross-country that simultaneously builds instrument PIC time and satisfies the commercial long cross-country—represents real savings in both dollars and calendar time. This is especially relevant now, as flight schools and CFIs report continued high demand for training slots amid airline hiring even as growth has moderated from the frantic pace of 2022-2023, meaning efficient use of aircraft and instructor availability benefits both students and the training pipeline as a whole.
The broader lesson here reflects a persistent gap in primary flight training: many students don't fully map out the certificate progression from private through commercial and CFI before they start logging hours, leading to inefficient flying that has to be repeated or supplemented later. Savvy CFIs and Part 61 flight schools increasingly counsel students early to plan cross-country routes that check boxes for instrument PIC time, commercial mileage/landing requirements, and even future CFI or ATP considerations simultaneously. This kind of forward planning is a hallmark of well-run training operations and a skill that translates directly into the kind of efficient, regulation-literate thinking pilots need throughout their careers—whether managing duty time, fuel planning, or compliance with Part 91/135/121 operating rules. It's a reminder that understanding the regulatory fine print isn't just an academic exercise for checkrides; it has direct, practical payoff in time and cost savings.
Finally, this question underscores the value of community knowledge-sharing platforms like r/flying, where prospective and current pilots crowdsource practical interpretations of FAA regulations that CFIs may not always volunteer proactively. While the regulatory answer is generally favorable (dual-logging is permitted when all specific criteria are met), pilots should always confirm with their instructor or a knowledgeable DPE that a given flight satisfies the exact letter of both 61.65 and 61.129 requirements—since landing point counts, mileage thresholds, and solo-vs-PIC distinctions can trip up students who assume any long flight automatically qualifies. Getting this right early prevents costly do-overs later in the certification sequence, a lesson equally applicable to future ATP-track pilots navigating 121 training records or business aviation pilots documenting type-specific experience for insurance and operator requirements.