| San Marino to Popovo | 6,631.14 mi (10,671.79 km) |
| San Marino to Provadia | 6,670.13 mi (10,734.54 km) |
| San Marino to Radnevo | 6,687.08 mi (10,761.82 km) |
| San Marino to Radomir | 6,595.17 mi (10,613.91 km) |
| San Marino to Rakitovo | 6,658.63 mi (10,716.04 km) |
| San Marino to Rakovski | 6,663.30 mi (10,723.54 km) |
| San Marino to Razgrad | 6,626.93 mi (10,665.01 km) |
| San Marino to Razlog | 6,648.27 mi (10,699.35 km) |
| San Marino to Ruse | 6,595.78 mi (10,614.88 km) |
| San Marino to Samokov | 6,623.78 mi (10,659.94 km) |
| San Marino to Sandanski | 6,661.96 mi (10,721.38 km) |
| San Marino to Sevlievo | 6,622.91 mi (10,658.55 km) |
| San Marino to Shumen | 6,652.11 mi (10,705.54 km) |
| San Marino to Silistra | 6,609.17 mi (10,636.43 km) |
| San Marino to Sliven | 6,673.88 mi (10,740.57 km) |
