| Potomac to Cuenca | 3,871.77 mi (6,231.01 km) |
| Potomac to Cuevas del Almanzora | 3,969.43 mi (6,388.19 km) |
| Potomac to Cullera | 3,989.89 mi (6,421.10 km) |
| Potomac to Culleredo | 3,489.00 mi (5,615.00 km) |
| Potomac to Cunit | 4,016.82 mi (6,464.45 km) |
| Potomac to Daganzo de Arriba | 3,795.43 mi (6,108.16 km) |
| Potomac to Daimiel | 3,829.96 mi (6,163.72 km) |
| Potomac to Don Benito | 3,724.25 mi (5,993.60 km) |
| Potomac to Donostia | 3,787.66 mi (6,095.65 km) |
| Potomac to Dos Hermanas | 3,769.85 mi (6,066.99 km) |
| Potomac to Durango | 3,761.66 mi (6,053.81 km) |
| Potomac to Ecija | 3,803.98 mi (6,121.92 km) |
| Potomac to Ejea de los Caballeros | 3,859.98 mi (6,212.03 km) |
| Potomac to El Alamo | 3,778.55 mi (6,080.99 km) |
| Potomac to El Arahal | 3,788.83 mi (6,097.53 km) |
