The CO2 emissions are calculated using IATA CO2 Connect calculator in line with the IATA Recommended Practice RP1726. Calculations are time-based and use aircraft-specific fuel burn. More information can be found in here.

Each year, airBaltic collects fuel consumption data per flight, for all flights. After fuel auditing, this data is submitted to the International Air Transport Association (IATA) via the EcoHub system for CO2 emission calculations, which calculates fuel consumption rate (per minute) for each aircraft type.

The CO2 emissions are calculated at three stages.

• Stage 1: Calculation of total CO2 emissions for a given flight by multiplying the fuel consumption rate by the scheduled flight duration, which is then multiplied by the emissions factor 3.16.

• Stage 2: Allocation of CO2 emissions between passenger and cargo (freight & mail) based on weight, considering available seats and the expected occupancy. The calculations assume airBaltic-specific monthly load factors and an average passenger weight of 100 kg, including all luggage.

  The passenger load factor in air transport statistics measures the percentage of revenue passengers flown relative to seats available for sale, both expressed in kilometers terms (Revenue Passenger-Kilometers / Available Seat-Kilometers * 100%), and is used as an indicator for assessing passenger demand, airline performance, and traffic growth.

  IATA receives passenger load factors from airlines at monthly basis by major route area. Those load factors are used as a central input, along with other metrics, to generate statistical estimates that aim to provide an illustrative representation of the airline’s traffic load. For airlines that do not provide load factors to IATA, IATA calculates estimates based on alternative sources available, or regional and/or airline profiling that are extrapolated from the sample data IATA has its disposal (up to 97% of the industry) and applying imputation. In general, IATA statistics cover international and domestic scheduled air traffic for IATA member and non-member airlines.

• Stage 3 : Allocation of CO2 emissions between passengers, by cabin class. For airBaltic fleet, passengers flying economy class contribute to CO2 emissions with a factor of 1 whereby passengers flying business class contribute with a factor of 1.5.