| Nieuwkoop to Popovo | 1,162.26 mi (1,870.47 km) |
| Nieuwkoop to Provadia | 1,216.48 mi (1,957.74 km) |
| Nieuwkoop to Radnevo | 1,197.93 mi (1,927.88 km) |
| Nieuwkoop to Radomir | 1,075.20 mi (1,730.36 km) |
| Nieuwkoop to Rakitovo | 1,143.96 mi (1,841.02 km) |
| Nieuwkoop to Rakovski | 1,162.00 mi (1,870.05 km) |
| Nieuwkoop to Razgrad | 1,165.40 mi (1,875.53 km) |
| Nieuwkoop to Razlog | 1,126.47 mi (1,812.88 km) |
| Nieuwkoop to Ruse | 1,130.92 mi (1,820.04 km) |
| Nieuwkoop to Samokov | 1,107.54 mi (1,782.41 km) |
| Nieuwkoop to Sandanski | 1,135.55 mi (1,827.49 km) |
| Nieuwkoop to Sevlievo | 1,133.51 mi (1,824.20 km) |
| Nieuwkoop to Shumen | 1,192.52 mi (1,919.17 km) |
| Nieuwkoop to Silistra | 1,170.34 mi (1,883.48 km) |
| Nieuwkoop to Sliven | 1,195.71 mi (1,924.32 km) |
