| San Luis Obispo to Popovo | 6,619.04 mi (10,652.32 km) |
| San Luis Obispo to Provadia | 6,656.01 mi (10,711.81 km) |
| San Luis Obispo to Radnevo | 6,676.97 mi (10,745.55 km) |
| San Luis Obispo to Radomir | 6,590.28 mi (10,606.03 km) |
| San Luis Obispo to Rakitovo | 6,652.45 mi (10,706.09 km) |
| San Luis Obispo to Rakovski | 6,655.03 mi (10,710.23 km) |
| San Luis Obispo to Razgrad | 6,614.06 mi (10,644.29 km) |
| San Luis Obispo to Razlog | 6,643.39 mi (10,691.50 km) |
| San Luis Obispo to Ruse | 6,583.56 mi (10,595.21 km) |
| San Luis Obispo to Samokov | 6,618.07 mi (10,650.76 km) |
| San Luis Obispo to Sandanski | 6,657.88 mi (10,714.82 km) |
| San Luis Obispo to Sevlievo | 6,613.34 mi (10,643.15 km) |
| San Luis Obispo to Shumen | 6,638.80 mi (10,684.11 km) |
| San Luis Obispo to Silistra | 6,594.15 mi (10,612.26 km) |
| San Luis Obispo to Sliven | 6,662.49 mi (10,722.25 km) |
