In this article, David Aughinbaugh II and the FlyRadius team review the operating costs and the fuel burn for the Beechcraft King Air C90GTx turboprop. An overview on the operating costs for the aircraft is first covered and is then followed by a review of the fuel burn.

Beechcraft King Air C90GTx Operating Costs

As with all aircraft, operating costs play an important role in making a financial decision for an aircraft. Beechcraft and Textron Aviation have fortunately provided a detailed overview on the overall operating costs for the King Air C90GTx.

In 2014, Beechcraft provided the following information on the operating costs for the turboprop in a cash flow projection document.

Fuel: 90 gallons per hour or $450 per hour at $5.00 USD/gallon for Jet A
Maintenance Costs:
Beechcraft used Conklin ACE numbers, which is a popular publication that provides information on operating costs for aircraft.

Maintenance Type

Year 1 Cost

Year 2 Cost

Year 3 Cost

Year 4 Cost

Year 5 Cost

Total 5 Year Costs

Conklin ACE Labor







Conklin ACE Parts







Propeller Overhaul















To showcase an example year of operations, Beechcraft estimated that operations per year would be 300 hours. That would be approximately 81,600 nautical miles at max cruise speed.

Yearly fuel costs for that profile would be $135,000 with Jet A at $5.00 USD.

Total costs per year would be the following with fuel costs:


Year 1

Year 2

Year 3

Year 4

Year 5

Total 5 Year

Maintenance Costs







Fuel Costs















A chart of the Beechcraft King Air C90GTx operating costs

Above is a chart of the King Air C90GTx operating costs by David Aughinbaugh II and FlyRadius. Feel free to share.

Other Operating Costs

There are other non-direct operating costs to take into account also. The costs of hanger space, pilots, and insurance also needs to be considered as part of the overall cost to operate the turboprop.

Beechcraft King Air C90GTx Fuel Burn – Fuel Consumption

Fuel burn is an important metric for operating costs. As mentioned before the fuel burn for the jet is around 90 gallons per hour. A breakdown of the fuel burn in other metrics is provided below. Textron did not provide a speed at which the aircraft was flying so were not able to use that number to provide miles per gallon or gallons per mile information. The following miles per gallon numbers were calculated with a simple range to gallons calculation. The numbers are estimates and for more accurate numbers we advise that you look at the pilot’s operating handbook for the King Air C90GTx.

Fuel Burn

  • Nautical Miles per Gallon: 6.56
  • Gallon per Nautical Mile: 0.152
  • * Max Range using all usable fuel. Max range includes reserve so the actual numbers will be slightly higher.

To learn more about the Beechcraft King Air C90GTx, please visit the other articles that are here on the site.