| Sittard to Popovo | 1,087.69 mi (1,750.47 km) |
| Sittard to Provadia | 1,143.34 mi (1,840.03 km) |
| Sittard to Radnevo | 1,120.11 mi (1,802.64 km) |
| Sittard to Radomir | 993.25 mi (1,598.49 km) |
| Sittard to Rakitovo | 1,062.52 mi (1,709.95 km) |
| Sittard to Rakovski | 1,082.63 mi (1,742.33 km) |
| Sittard to Razgrad | 1,091.82 mi (1,757.11 km) |
| Sittard to Razlog | 1,043.87 mi (1,679.94 km) |
| Sittard to Ruse | 1,057.30 mi (1,701.55 km) |
| Sittard to Samokov | 1,026.07 mi (1,651.30 km) |
| Sittard to Sandanski | 1,052.02 mi (1,693.06 km) |
| Sittard to Sevlievo | 1,056.24 mi (1,699.85 km) |
| Sittard to Shumen | 1,118.88 mi (1,800.66 km) |
| Sittard to Silistra | 1,099.73 mi (1,769.84 km) |
| Sittard to Sliven | 1,119.49 mi (1,801.64 km) |
