| San Marcos to Popovo | 6,669.40 mi (10,733.36 km) |
| San Marcos to Provadia | 6,709.32 mi (10,797.61 km) |
| San Marcos to Radnevo | 6,724.36 mi (10,821.81 km) |
| San Marcos to Radomir | 6,630.00 mi (10,669.96 km) |
| San Marcos to Rakitovo | 6,694.05 mi (10,773.03 km) |
| San Marcos to Rakovski | 6,699.71 mi (10,782.14 km) |
| San Marcos to Razgrad | 6,665.56 mi (10,727.17 km) |
| San Marcos to Razlog | 6,683.06 mi (10,755.35 km) |
| San Marcos to Ruse | 6,634.12 mi (10,676.58 km) |
| San Marcos to Samokov | 6,658.98 mi (10,716.59 km) |
| San Marcos to Sandanski | 6,696.35 mi (10,776.74 km) |
| San Marcos to Sevlievo | 6,659.98 mi (10,718.20 km) |
| San Marcos to Shumen | 6,690.93 mi (10,768.02 km) |
| San Marcos to Silistra | 6,648.83 mi (10,700.25 km) |
| San Marcos to Sliven | 6,711.77 mi (10,801.55 km) |
