| Rancho San Diego to Popovo | 6,686.08 mi (10,760.21 km) |
| Rancho San Diego to Provadia | 6,726.30 mi (10,824.93 km) |
| Rancho San Diego to Radnevo | 6,740.73 mi (10,848.16 km) |
| Rancho San Diego to Radomir | 6,645.61 mi (10,695.08 km) |
| Rancho San Diego to Rakitovo | 6,709.83 mi (10,798.43 km) |
| Rancho San Diego to Rakovski | 6,715.81 mi (10,808.05 km) |
| Rancho San Diego to Razgrad | 6,682.36 mi (10,754.21 km) |
| Rancho San Diego to Razlog | 6,698.65 mi (10,780.44 km) |
| Rancho San Diego to Ruse | 6,650.83 mi (10,703.48 km) |
| Rancho San Diego to Samokov | 6,674.70 mi (10,741.90 km) |
| Rancho San Diego to Sandanski | 6,711.82 mi (10,801.62 km) |
| Rancho San Diego to Sevlievo | 6,676.29 mi (10,744.44 km) |
| Rancho San Diego to Shumen | 6,707.79 mi (10,795.15 km) |
| Rancho San Diego to Silistra | 6,665.95 mi (10,727.81 km) |
| Rancho San Diego to Sliven | 6,728.34 mi (10,828.21 km) |
