| Opwijk to Provadia | 1,212.05 mi (1,950.60 km) |
| Opwijk to Radnevo | 1,186.49 mi (1,909.47 km) |
| Opwijk to Radomir | 1,057.02 mi (1,701.11 km) |
| Opwijk to Rakitovo | 1,126.57 mi (1,813.04 km) |
| Opwijk to Rakovski | 1,148.11 mi (1,847.70 km) |
| Opwijk to Razgrad | 1,160.38 mi (1,867.45 km) |
| Opwijk to Razlog | 1,107.03 mi (1,781.60 km) |
| Opwijk to Ruse | 1,125.87 mi (1,811.91 km) |
| Opwijk to Samokov | 1,090.15 mi (1,754.42 km) |
| Opwijk to Sandanski | 1,114.38 mi (1,793.43 km) |
| Opwijk to Sevlievo | 1,123.01 mi (1,807.31 km) |
| Opwijk to Shumen | 1,187.39 mi (1,910.91 km) |
| Opwijk to Silistra | 1,169.46 mi (1,882.07 km) |
| Opwijk to Sliven | 1,186.75 mi (1,909.90 km) |
| Opwijk to Smolyan | 1,168.68 mi (1,880.81 km) |
