| Potomac to Rury | 4,551.15 mi (7,324.36 km) |
| Potomac to Rybnik | 4,445.95 mi (7,155.06 km) |
| Potomac to Ryki | 4,515.28 mi (7,266.64 km) |
| Potomac to Rypin | 4,374.26 mi (7,039.70 km) |
| Potomac to Rzeszow | 4,577.54 mi (7,366.83 km) |
| Potomac to Sandomierz | 4,543.90 mi (7,312.71 km) |
| Potomac to Sanok | 4,603.92 mi (7,409.30 km) |
| Potomac to Sedziszow Malopolski | 4,565.12 mi (7,346.84 km) |
| Potomac to Sepolno Krajenskie | 4,292.17 mi (6,907.58 km) |
| Potomac to Sidlice | 4,300.85 mi (6,921.55 km) |
| Potomac to Siechnice | 4,359.74 mi (7,016.33 km) |
| Potomac to Siedlce | 4,507.74 mi (7,254.51 km) |
| Potomac to Siemianowice Slaskie | 4,455.61 mi (7,170.61 km) |
| Potomac to Siemiatycze | 4,519.04 mi (7,272.69 km) |
| Potomac to Sieradz | 4,399.96 mi (7,081.05 km) |
