In some cases, the relevant measures involved no state aid (e.g. ), in others they were in line with common EU rules (e.g. , , airlines, and ), in still others, airlines had to pay back the undue advantages they had received (, ).
Mõnel juhul ei osutunud asjaomased meetmed riigiabiks (nt ), teistel juhtudel olid need kooskõlas ELi ühiseeskirjadega (nt , , , ja ) ning samuti on esinenud juhtumeid, kus lennuettevõtjad pidid saadud põhjendamatu eelise hüvitama (, ).