| Castellon de la Plana to Popovo | 1,369.66 mi (2,204.26 km) |
| Castellon de la Plana to Provadia | 1,430.02 mi (2,301.39 km) |
| Castellon de la Plana to Radnevo | 1,355.24 mi (2,181.05 km) |
| Castellon de la Plana to Radomir | 1,202.91 mi (1,935.89 km) |
| Castellon de la Plana to Rakitovo | 1,261.23 mi (2,029.76 km) |
| Castellon de la Plana to Rakovski | 1,305.82 mi (2,101.52 km) |
| Castellon de la Plana to Razgrad | 1,384.08 mi (2,227.46 km) |
| Castellon de la Plana to Razlog | 1,229.77 mi (1,979.12 km) |
| Castellon de la Plana to Ruse | 1,356.55 mi (2,183.15 km) |
| Castellon de la Plana to Samokov | 1,233.73 mi (1,985.50 km) |
| Castellon de la Plana to Sandanski | 1,221.09 mi (1,965.16 km) |
| Castellon de la Plana to Sevlievo | 1,312.98 mi (2,113.03 km) |
| Castellon de la Plana to Shumen | 1,404.82 mi (2,260.84 km) |
| Castellon de la Plana to Silistra | 1,422.25 mi (2,288.89 km) |
| Castellon de la Plana to Sliven | 1,374.89 mi (2,212.66 km) |
