| Boulder to Prokuplje | 5,797.89 mi (9,330.81 km) |
| Boulder to Raca | 5,725.04 mi (9,213.57 km) |
| Boulder to Raska | 5,764.59 mi (9,277.21 km) |
| Boulder to Razanj | 5,773.24 mi (9,291.13 km) |
| Boulder to Rekovac | 5,749.51 mi (9,252.95 km) |
| Boulder to Ruma | 5,648.30 mi (9,090.06 km) |
| Boulder to Sabac | 5,657.03 mi (9,104.11 km) |
| Boulder to Secanj | 5,657.40 mi (9,104.71 km) |
| Boulder to Senta | 5,606.34 mi (9,022.52 km) |
| Boulder to Sid | 5,623.46 mi (9,050.08 km) |
| Boulder to Sjenica | 5,746.38 mi (9,247.91 km) |
| Boulder to Smederevo | 5,700.13 mi (9,173.47 km) |
| Boulder to Smederevska Palanka | 5,717.14 mi (9,200.84 km) |
| Boulder to Sokobanja | 5,783.89 mi (9,308.27 km) |
| Boulder to Sombor | 5,584.43 mi (8,987.27 km) |
