The story
- Proto-Indo-European*h₂ews-
- Proto-Indo-European*h₂ewsér
- Proto-Hellenic*auhḗr
- Ancient Greekᾱ̓ήρ (āḗr)
- Ancient Greekἀέρος (aéros)
- Englishaero-
- Proto-Indo-European*per-
- Proto-Indo-European*pértus
- Proto-Italic*portus
- Latinportus
- Old Englishport
- Englishport
- English todayaeroport
From aero- + port as a modification of earlier airport. Compare French aéroport.
Etymology from Wiktionary, CC BY-SA 4.0.