| Morro Bay to Popovo | 6,616.64 mi (10,648.46 km) |
| Morro Bay to Provadia | 6,653.46 mi (10,707.71 km) |
| Morro Bay to Radnevo | 6,674.72 mi (10,741.92 km) |
| Morro Bay to Radomir | 6,588.41 mi (10,603.03 km) |
| Morro Bay to Rakitovo | 6,650.49 mi (10,702.92 km) |
| Morro Bay to Rakovski | 6,652.91 mi (10,706.82 km) |
| Morro Bay to Razgrad | 6,611.60 mi (10,640.35 km) |
| Morro Bay to Razlog | 6,641.52 mi (10,688.49 km) |
| Morro Bay to Ruse | 6,581.15 mi (10,591.34 km) |
| Morro Bay to Samokov | 6,616.14 mi (10,647.65 km) |
| Morro Bay to Sandanski | 6,656.07 mi (10,711.90 km) |
| Morro Bay to Sevlievo | 6,611.13 mi (10,639.59 km) |
| Morro Bay to Shumen | 6,636.31 mi (10,680.11 km) |
| Morro Bay to Silistra | 6,591.54 mi (10,608.06 km) |
| Morro Bay to Sliven | 6,660.14 mi (10,718.47 km) |
