| Apen to Devnya | 1,136.00 mi (1,828.22 km) |
| Apen to Dimitrovgrad | 1,126.40 mi (1,812.77 km) |
| Apen to Dobrich | 1,128.93 mi (1,816.84 km) |
| Apen to Dospat | 1,101.08 mi (1,772.02 km) |
| Apen to Dupnitsa | 1,034.50 mi (1,664.86 km) |
| Apen to Elhovo | 1,153.12 mi (1,855.76 km) |
| Apen to Etropole | 1,032.26 mi (1,661.26 km) |
| Apen to Gabrovo | 1,075.10 mi (1,730.21 km) |
| Apen to Gorna Oryahovitsa | 1,074.17 mi (1,728.71 km) |
| Apen to Gotse Delchev | 1,092.02 mi (1,757.44 km) |
| Apen to Harmanli | 1,142.57 mi (1,838.78 km) |
| Apen to Haskovo | 1,131.42 mi (1,820.85 km) |
| Apen to Ihtiman | 1,047.32 mi (1,685.50 km) |
| Apen to Isperih | 1,085.55 mi (1,747.03 km) |
| Apen to Kardzhali | 1,139.82 mi (1,834.36 km) |
