| San Diego to Popovo | 6,686.96 mi (10,761.62 km) |
| San Diego to Provadia | 6,727.02 mi (10,826.10 km) |
| San Diego to Radnevo | 6,741.77 mi (10,849.83 km) |
| San Diego to Radomir | 6,647.03 mi (10,697.36 km) |
| San Diego to Rakitovo | 6,711.16 mi (10,800.57 km) |
| San Diego to Rakovski | 6,716.98 mi (10,809.94 km) |
| San Diego to Razgrad | 6,683.17 mi (10,755.52 km) |
| San Diego to Razlog | 6,700.08 mi (10,782.74 km) |
| San Diego to Ruse | 6,651.69 mi (10,704.86 km) |
| San Diego to Samokov | 6,676.07 mi (10,744.09 km) |
| San Diego to Sandanski | 6,713.31 mi (10,804.03 km) |
| San Diego to Sevlievo | 6,677.35 mi (10,746.16 km) |
| San Diego to Shumen | 6,708.58 mi (10,796.41 km) |
| San Diego to Silistra | 6,666.60 mi (10,728.85 km) |
| San Diego to Sliven | 6,729.27 mi (10,829.72 km) |
