Akıncı Air Base (, formerly Mürted Hava Üssü) is an airbase of the Turkish Air Force located northwest of Ankara, Turkey. Eskişehir is the 4th Air Wing (Ana Jet Üs or AJÜ) of the 1st Air Force Command (Hava Kuvvet Komutanligi) of the Turkish Air Force (Türk Hava Kuvvetleri). Other wings of this command are located in Eskişehir (LTBI), Konya (LTAN), Bandırma (LTBG) and Balıkesir (LTBF). Akoncı Air Base hosts the F-16C/D jet fighters of the 141st (fighter), 142nd (bomber) and 143rd (training) squadrons.