| California City to Popovo | 6,560.60 mi (10,558.26 km) |
| California City to Provadia | 6,599.38 mi (10,620.67 km) |
| California City to Radnevo | 6,616.77 mi (10,648.66 km) |
| California City to Radomir | 6,525.49 mi (10,501.76 km) |
| California City to Rakitovo | 6,588.79 mi (10,603.64 km) |
| California City to Rakovski | 6,593.20 mi (10,610.73 km) |
| California City to Razgrad | 6,556.30 mi (10,551.35 km) |
| California City to Razlog | 6,578.59 mi (10,587.22 km) |
| California City to Ruse | 6,525.22 mi (10,501.33 km) |
| California City to Samokov | 6,553.99 mi (10,547.63 km) |
| California City to Sandanski | 6,592.38 mi (10,609.42 km) |
| California City to Sevlievo | 6,552.66 mi (10,545.49 km) |
| California City to Shumen | 6,581.44 mi (10,591.81 km) |
| California City to Silistra | 6,538.32 mi (10,522.41 km) |
| California City to Sliven | 6,603.42 mi (10,627.18 km) |
