With today's fuel prices, it costs about $450,000 to fill up a Boeing 747, depending on your market. By contrast, the Gulfstream G280, a popular business aviation aircraft, costs around $8,000 to fill.

The cost to "fill up" a private jet in 2026 depends entirely on the aircraft's fuel capacity and the current price of Jet-A fuel, which averages around $6 to $9 per gallon depending on the FBO (Fixed Base Operator) location. For a Light Jet like a Cessna Citation CJ3, which holds about 700 gallons, a full tank costs roughly $4,200 to $6,300. A Midsize Jet like the Challenger 350 holds about 2,100 gallons, bringing the cost to $12,600 to $18,900. For a Large Cabin Jet like the Gulfstream G650, which has a massive fuel capacity of approximately 6,500 gallons, a complete fill-up can cost a staggering $39,000 to $58,500. These figures don't include "ramp fees" or taxes, which can add several hundred dollars to the bill. Many private owners also pay a premium for Sustainable Aviation Fuel (SAF) where available, which can be 20-30% more expensive than standard jet fuel, further increasing the cost of a single long-range mission from New York to London or Dubai.