In the air

Quick Tips: You can enter IATA codes to quickly find an airport name - the code will be printed on your ticket, or you can check this list.

You can calculate up to 10 flights at a time - either individual trips, or the legs of a long-haul flight. For a long-haul flight set each leg to "Single".

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Flight

Flights

The emissions factors that we use for flights include three "extras":

  • Uplift - this is an 8% increase in all of the factors to reflect the fact that airplanes cannot always fly an exact Great Circle route and often have to wait before landing - unlike a car you can't just switch the engines off whilst waiting so airplanes "stack" near the airport which, inevitably, uses more fuel.
  • Radiative Forcing - this is a 90% increase in all factors to take account of the fact that emissions high up in the atmosphere have a greater environmental impact than ground-level emissions. Defra recommends (from 2014) that everyone use factors in their calculations that include RF and we have chosen to do so to reflect the real environmental cost of flying.
  • Well To Tank - the emissions associated with the extraction, refining and transportation of the raw fuel prior to combustion. Defra supplies WTT data to accompany the base+RF emissions factors. We use WTT figures as they help to reflect the true carbon cost of an activity. Including WTT figures adds approximately 10% to the emissions figures.
Class

Class

The class that we choose to fly has an impact on our footprint because the "higher" the class the less passengers in that class, so they have to bear a larger proportion of the plane's emissions footprint.

Passengers
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Your Carbon Footprint

Cost per metric ton of CO₂ = $26.00
As you add items to the basket a summary will appear here.