Great question - NBO to FRA just means Nairobi Jomo Kenyatta Intl Airport to Frankfurt am Main Airport. Now you’ll know what these unique codes when you look for flights! This flight route has multiple associated airports, so we think it might be helpful to learn the name and codes of them as well. They are Stuttgart Echterdingen Airport (STR), Karlsruhe Söllingen Airport (FKB), Frankfurt-Hahn Airport (HHN), Saarbruecken Ensheim Airport (SCN), Mannheim City Airport (MHG).