| California to Popovo | 5,013.52 mi (8,068.47 km) |
| California to Provadia | 5,068.67 mi (8,157.23 km) |
| California to Radnevo | 5,044.67 mi (8,118.61 km) |
| California to Radomir | 4,911.30 mi (7,903.98 km) |
| California to Rakitovo | 4,981.22 mi (8,016.50 km) |
| California to Rakovski | 5,005.38 mi (8,055.37 km) |
| California to Razgrad | 5,017.35 mi (8,074.64 km) |
| California to Razlog | 4,959.50 mi (7,981.55 km) |
| California to Ruse | 4,982.83 mi (8,019.09 km) |
| California to Samokov | 4,945.00 mi (7,958.21 km) |
| California to Sandanski | 4,964.42 mi (7,989.46 km) |
| California to Sevlievo | 4,981.38 mi (8,016.76 km) |
| California to Shumen | 5,044.44 mi (8,118.24 km) |
| California to Silistra | 5,022.79 mi (8,083.41 km) |
| California to Sliven | 5,045.13 mi (8,119.34 km) |
