| Harderwijk to Popovo | 1,134.14 mi (1,825.23 km) |
| Harderwijk to Provadia | 1,187.73 mi (1,911.47 km) |
| Harderwijk to Radnevo | 1,171.27 mi (1,884.98 km) |
| Harderwijk to Radomir | 1,050.88 mi (1,691.23 km) |
| Harderwijk to Rakitovo | 1,119.28 mi (1,801.30 km) |
| Harderwijk to Rakovski | 1,136.15 mi (1,828.46 km) |
| Harderwijk to Razgrad | 1,136.87 mi (1,829.62 km) |
| Harderwijk to Razlog | 1,102.51 mi (1,774.32 km) |
| Harderwijk to Ruse | 1,102.44 mi (1,774.20 km) |
| Harderwijk to Samokov | 1,082.91 mi (1,742.78 km) |
| Harderwijk to Sandanski | 1,112.17 mi (1,789.86 km) |
| Harderwijk to Sevlievo | 1,106.63 mi (1,780.96 km) |
| Harderwijk to Shumen | 1,163.99 mi (1,873.26 km) |
| Harderwijk to Silistra | 1,140.66 mi (1,835.71 km) |
| Harderwijk to Sliven | 1,168.30 mi (1,880.21 km) |
