| Boulder to Rury | 5,389.57 mi (8,673.68 km) |
| Boulder to Rybnik | 5,340.72 mi (8,595.06 km) |
| Boulder to Ryki | 5,352.60 mi (8,614.17 km) |
| Boulder to Rypin | 5,209.49 mi (8,383.86 km) |
| Boulder to Rzeszow | 5,440.87 mi (8,756.23 km) |
| Boulder to Sandomierz | 5,398.88 mi (8,688.65 km) |
| Boulder to Sanok | 5,473.06 mi (8,808.04 km) |
| Boulder to Sedziszow Malopolski | 5,430.77 mi (8,739.98 km) |
| Boulder to Sepolno Krajenskie | 5,137.24 mi (8,267.59 km) |
| Boulder to Sidlice | 5,120.36 mi (8,240.43 km) |
| Boulder to Siechnice | 5,250.75 mi (8,450.27 km) |
| Boulder to Siedlce | 5,332.88 mi (8,582.44 km) |
| Boulder to Siemianowice Slaskie | 5,343.16 mi (8,598.99 km) |
| Boulder to Siemiatycze | 5,334.17 mi (8,584.51 km) |
| Boulder to Sieradz | 5,267.05 mi (8,476.49 km) |
