What type of fuel do balloons use? June 18, 2020 June 18, 2020 admin Sport hot air balloons carry 20 to 45 gallons of propane in stainless steel fuel tanks. Our passenger balloons generally carry around 75 to 95 gallons of propane which is good for three times the duration of our planned flight. Previous postCan you steer a balloon?Next postHow high do balloons fly?