US aviation fuel prices rose again in September, creating a practical planning problem for flight departments: a monthly average can flag cost pressure, but it cannot replace the price available at a particular airport.
iFlightPlanner's October 5 report puts national full-service Jet-A at $8.36 per US gallon, up 4.9% from August. The average excluding Alaska and Hawaii was $8.31, a 5.1% increase. Its sample covers 3,370 US fixed-base operators and fuel service providers, with prices reflecting reported retail offers when confirmed.
Read the number in its proper market
These figures describe US airport retail fuel pricing. They are not a global wholesale jet-fuel benchmark or a statement of what every airline pays under its supply contracts.
That distinction matters when an operations team explains a rising trip estimate to colleagues or customers. A national average provides context; the relevant purchasing evidence is the provider's current quote, the type of service offered and the terms available to that operator.
The source also reports national full-service 100LL at $7.75 and self-service 100LL at $6.67. Those categories serve a different fuel market and should remain separate from Jet-A comparisons.
Small differences become visible on a trip
For illustration, a hypothetical 39-cent increase applied to a hypothetical 1,000-gallon purchase adds $390. This is arithmetic, not an estimate for a particular aircraft or itinerary. The operational impact depends on actual uplift, purchasing arrangements and where the fuel is bought.
For dispatch and purchasing staff, the useful response is to make cost assumptions easy to trace. A trip estimate can record the airport, provider, quote date and whether the price is retail or contractual, so a later change is understandable.
Keep the handoff clear
The September reading gives teams a reason to revisit estimates that were prepared using older prices. It also makes coordination between schedulers, flight crews and accounts staff more valuable: all three need to know which quote was used.
Fuel purchasing remains part of a wider operational decision. Any comparison between airports must also account for the flight's requirements and the time and services involved. The clearest business takeaway is better price visibility, with the monthly trend used as a prompt to check the actual trip.