| Killingworth to Devnya | 1,532.39 mi (2,466.14 km) |
| Killingworth to Dimitrovgrad | 1,516.39 mi (2,440.40 km) |
| Killingworth to Dobrich | 1,526.17 mi (2,456.13 km) |
| Killingworth to Dospat | 1,485.55 mi (2,390.76 km) |
| Killingworth to Dupnitsa | 1,417.76 mi (2,281.67 km) |
| Killingworth to Elhovo | 1,545.60 mi (2,487.41 km) |
| Killingworth to Etropole | 1,420.58 mi (2,286.20 km) |
| Killingworth to Gabrovo | 1,466.91 mi (2,360.76 km) |
| Killingworth to Gorna Oryahovitsa | 1,467.47 mi (2,361.67 km) |
| Killingworth to Gotse Delchev | 1,474.67 mi (2,373.25 km) |
| Killingworth to Harmanli | 1,532.93 mi (2,467.02 km) |
| Killingworth to Haskovo | 1,520.97 mi (2,447.76 km) |
| Killingworth to Ihtiman | 1,433.63 mi (2,307.21 km) |
| Killingworth to Isperih | 1,481.94 mi (2,384.95 km) |
| Killingworth to Kardzhali | 1,527.93 mi (2,458.97 km) |
