| Ostend to Provadia | 1,269.72 mi (2,043.42 km) |
| Ostend to Radnevo | 1,244.09 mi (2,002.17 km) |
| Ostend to Radomir | 1,114.24 mi (1,793.19 km) |
| Ostend to Rakitovo | 1,183.84 mi (1,905.20 km) |
| Ostend to Rakovski | 1,205.61 mi (1,940.23 km) |
| Ostend to Razgrad | 1,218.06 mi (1,960.28 km) |
| Ostend to Razlog | 1,164.12 mi (1,873.48 km) |
| Ostend to Ruse | 1,183.55 mi (1,904.74 km) |
| Ostend to Samokov | 1,147.42 mi (1,846.60 km) |
| Ostend to Sandanski | 1,171.30 mi (1,885.02 km) |
| Ostend to Sevlievo | 1,180.65 mi (1,900.07 km) |
| Ostend to Shumen | 1,245.07 mi (2,003.74 km) |
| Ostend to Silistra | 1,227.04 mi (1,974.72 km) |
| Ostend to Sliven | 1,244.42 mi (2,002.70 km) |
| Ostend to Smolyan | 1,225.94 mi (1,972.97 km) |
