The CRF sector (IPCC 2006) 'domestic aviation' is a transport sector defined by the 2006 IPCC Guidelines for National Greenhouse Gas Inventories:
Emissions from civil domestic passenger and freight traffic that departs and arrives in the same country (commercial, private, agriculture, etc.), including take-offs and landings for these flight stages. Note that this may include journeys of considerable length between two airports in a country (e.g. San Francisco to Honolulu). Exclude military, which should be reported under 1 A 5 b.