| Kotka to Devnya | 1,192.14 mi (1,918.57 km) |
| Kotka to Dimitrovgrad | 1,273.73 mi (2,049.87 km) |
| Kotka to Dobrich | 1,168.27 mi (1,880.14 km) |
| Kotka to Dospat | 1,305.40 mi (2,100.84 km) |
| Kotka to Dupnitsa | 1,267.86 mi (2,040.43 km) |
| Kotka to Elhovo | 1,264.51 mi (2,035.03 km) |
| Kotka to Etropole | 1,224.56 mi (1,970.74 km) |
| Kotka to Gabrovo | 1,217.90 mi (1,960.03 km) |
| Kotka to Gorna Oryahovitsa | 1,198.74 mi (1,929.19 km) |
| Kotka to Gotse Delchev | 1,312.91 mi (2,112.92 km) |
| Kotka to Harmanli | 1,281.29 mi (2,062.03 km) |
| Kotka to Haskovo | 1,281.85 mi (2,062.94 km) |
| Kotka to Ihtiman | 1,252.61 mi (2,015.87 km) |
| Kotka to Isperih | 1,157.32 mi (1,862.53 km) |
| Kotka to Kardzhali | 1,301.81 mi (2,095.07 km) |
