| Castelo Branco to Devnya | 1,815.84 mi (2,922.31 km) |
| Castelo Branco to Dimitrovgrad | 1,723.82 mi (2,774.23 km) |
| Castelo Branco to Dobrich | 1,827.33 mi (2,940.80 km) |
| Castelo Branco to Dospat | 1,653.43 mi (2,660.95 km) |
| Castelo Branco to Dupnitsa | 1,595.91 mi (2,568.36 km) |
| Castelo Branco to Elhovo | 1,772.22 mi (2,852.11 km) |
| Castelo Branco to Etropole | 1,638.02 mi (2,636.14 km) |
| Castelo Branco to Gabrovo | 1,705.26 mi (2,744.35 km) |
| Castelo Branco to Gorna Oryahovitsa | 1,722.47 mi (2,772.04 km) |
| Castelo Branco to Gotse Delchev | 1,631.80 mi (2,626.13 km) |
| Castelo Branco to Harmanli | 1,740.02 mi (2,800.29 km) |
| Castelo Branco to Haskovo | 1,722.99 mi (2,772.89 km) |
| Castelo Branco to Ihtiman | 1,630.56 mi (2,624.13 km) |
| Castelo Branco to Isperih | 1,776.76 mi (2,859.43 km) |
| Castelo Branco to Kardzhali | 1,714.99 mi (2,760.01 km) |
