Personal planes have significantly higher emissions than other modes of transport. An average journey in one produces CO2 equivalent to driving a petrol car from Paris to Rome 16 times.

On a per-passenger basis, a private jet is significantly more carbon-intensive than a car. In 2026, environmental data suggests that a private jet emits between 10 to 20 times more CO2 per passenger than a commercial flight and up to 50 times more than a high-occupancy car or train. A single hour of flight on a light private jet can produce approximately 2 tonnes of CO2; for comparison, the average passenger car emits about 4.6 tonnes of CO2 in an entire year. While a car pool of four people can achieve an efficiency of roughly 50g–70g of CO2 per passenger-kilometer, a light jet with only two passengers can exceed 1,000g per passenger-kilometer. These figures are even more stark for "short hops"—flights under 500km—where the fuel-intensive takeoff and climb phases represent a larger portion of the journey. While some private aviation companies are transitioning to Sustainable Aviation Fuel (SAF) in 2026 to mitigate this impact, the absolute volume of emissions per individual traveler remains the primary target for global carbon reduction regulations and "flight shaming" movements.