Emissions calculation

Real – uses actual data from historical fuel burn to give the most accurate calculation of emissions for given city pairs.

Modelled – uses the distance between airports and known emissions factors calculate emissions. This is also an accurate method of calculation, but not quite as good as real.

Average – uses average distances flown by the airline, either overall or in a particular region. With a few exceptions this is not an accurate way to calculate the emissions for your flight and probably doesn’t meet the criteria for a carbon offset. As an alternative you could consider carbon offsets for your flight that are calculated accurately and QAS-certified. (link to QAS-approved page)

Unclear – information not provided so impossible to know if emissions are calculated accurately or not. As an alternative you could consider carbon offsets for your flight that are calculated accurately and QAS-certified. (link to QAS-approved page)

Suggestion – the airline suggests an amount not specifically related to your flight. This makes it a donation and not a carbon offset. As an alternative you could consider carbon offsets for your flight that are calculated accurately and QAS-certified. (link to QAS-approved page)