| Potomac to Pyrzyce | 4,205.99 mi (6,768.89 km) |
| Potomac to Pyskowice | 4,437.83 mi (7,142.00 km) |
| Potomac to Raciborz | 4,433.89 mi (7,135.66 km) |
| Potomac to Radom | 4,495.50 mi (7,234.81 km) |
| Potomac to Radomsko | 4,444.77 mi (7,153.17 km) |
| Potomac to Radzionkow Nowy | 4,447.90 mi (7,158.21 km) |
| Potomac to Radzymin | 4,459.54 mi (7,176.93 km) |
| Potomac to Radzyn Podlaski | 4,534.63 mi (7,297.78 km) |
| Potomac to Rawa Mazowiecka | 4,449.35 mi (7,160.54 km) |
| Potomac to Rawicz | 4,329.20 mi (6,967.17 km) |
| Potomac to Reda | 4,282.45 mi (6,891.93 km) |
| Potomac to Rogozno | 4,296.24 mi (6,914.13 km) |
| Potomac to Ropczyce | 4,562.64 mi (7,342.86 km) |
| Potomac to Ruda Slaska | 4,451.07 mi (7,163.31 km) |
| Potomac to Rumia | 4,285.87 mi (6,897.43 km) |
