The nearest airport is PDV - Plovdiv, located 62.3 km west of Krepost.
Other airports nearby include GOZ - Gorna Orechovica Gorna Oryahovitsa (126.4 km north), AXD - Alexandroupolis Dimokritos (132.3 km south), KVA - Kavala Megas Alexandros Intl (147.4 km south west), BOJ - Bourgas Burgas (169.5 km east),