The nearest airport is THN - Trollhattan Vanersborg, located 41.2 km east of Knähammar.
Other airports nearby include GSE - Gothenborg Save (72.5 km south), LDK - Lidkoping (88.2 km east), GOT - Gothenborg Landvetter (91.4 km south east), TRF - Torp (118.2 km north west),