Why do different companies give different prices to offset emissions from the same flight?
We understand that other offset programs calculate emissions based on kilometres flown – this method does not take into account many factors that influence fuel use and emissions including weather conditions (e.g. headwinds) and air traffic requirements (e.g. holding patterns). You would need to ask different companies about the specifics of how they calculate emissions. We have undertaken an extensive study into our greenhouse gas emissions. The emissions we have attributed to your seat are based on actual fuel use figures over the past year for the sector you are flying. Added to this is a component for greenhouse gas emissions associated with ground activities associated with your flight including electricity use in the terminals and fuel used by the ground service vehicles. Finally, many companies attempt to account for non-CO2 emissions by using various factors. As already mentioned, there is still considerable scientific uncertainty about the scale of the impact of these emission
