| San Mateo to Popovo | 6,509.25 mi (10,475.63 km) |
| San Mateo to Provadia | 6,544.39 mi (10,532.18 km) |
| San Mateo to Radnevo | 6,568.86 mi (10,571.56 km) |
| San Mateo to Radomir | 6,486.99 mi (10,439.80 km) |
| San Mateo to Rakitovo | 6,547.90 mi (10,537.82 km) |
| San Mateo to Rakovski | 6,548.59 mi (10,538.94 km) |
| San Mateo to Razgrad | 6,503.59 mi (10,466.52 km) |
| San Mateo to Razlog | 6,540.02 mi (10,525.15 km) |
| San Mateo to Ruse | 6,473.71 mi (10,418.43 km) |
| San Mateo to Samokov | 6,514.00 mi (10,483.27 km) |
| San Mateo to Sandanski | 6,555.22 mi (10,549.61 km) |
| San Mateo to Sevlievo | 6,505.80 mi (10,470.08 km) |
| San Mateo to Shumen | 6,527.91 mi (10,505.65 km) |
| San Mateo to Silistra | 6,481.83 mi (10,431.50 km) |
| San Mateo to Sliven | 6,553.27 mi (10,546.47 km) |
