Airline Affiliates Non-IAG affiliate airline Aer Lingus[58] Aer Lingus UK Aer Lingus Regional British Airways BA CityFlyer SUN-AIR (franchise) Iberia Iberia Express Air Nostrum (franchise, trading as Iberia Regional) Level A — — Vueling — — Other subsidiaries IAG Cargo (merger between Iberia Cargo and British Airways World Cargo) Avios Group (operates the IAG frequent-flyer programme)[2]