Flight carbon footprint: what affects it?

Flying contributes significantly to global carbon emissions. Understanding the factors that influence a flight's carbon footprint can help travelers make more informed decisions.

Carbon calculator

Emissions
Great-circle distance
Captures non-CO₂ effects
CO₂e estimate
— kg
Notes
Uses per-passenger factors: econ 0.115, premium 0.15, business 0.23 kg/km × RF.
Rough estimate only; airlines report more accurate figures. See Disclaimer.

How the estimate works

Several key factors affect a flight’s carbon footprint, including aircraft type, distance flown, passenger load factor, and fuel efficiency. Larger planes generally emit more CO2 per passenger mile than smaller ones. Longer flights tend to have higher emissions due to the longer time spent burning fuel at cruising altitude. A full plane has lower emissions per person compared to an empty one because fixed emissions are spread across more passengers. Fuel-efficient aircraft and engines can also reduce carbon output.

How to reduce the cost

FAQ

Different aircraft models have varying fuel efficiencies. Generally, newer planes are more efficient and emit less CO2 per passenger mile.

Nighttime flights do not directly impact your carbon footprint differently from daytime flights; however, some studies suggest nighttime emissions might have a slightly higher warming effect due to atmospheric conditions.

Yes, reducing the weight of your luggage can decrease fuel consumption and thus lower the overall carbon footprint of your flight.

For a general-purpose tool, see: /appliance-electricity-cost-calculator