| Potomac to Irun | 3,796.00 mi (6,109.08 km) |
| Potomac to Isla-Cristina | 3,702.70 mi (5,958.91 km) |
| Potomac to Jaca | 3,875.31 mi (6,236.70 km) |
| Potomac to Jaen | 3,861.64 mi (6,214.71 km) |
| Potomac to Jerez de la Frontera | 3,777.07 mi (6,078.61 km) |
| Potomac to Jerez de los Caballeros | 3,697.62 mi (5,950.75 km) |
| Potomac to Jodar | 3,880.29 mi (6,244.73 km) |
| Potomac to Jumilla | 3,959.25 mi (6,371.79 km) |
| Potomac to La Algaba | 3,761.07 mi (6,052.86 km) |
| Potomac to La Baneza | 3,631.30 mi (5,844.02 km) |
| Potomac to La Carlota | 3,807.42 mi (6,127.44 km) |
| Potomac to La Carolina | 3,854.18 mi (6,202.70 km) |
| Potomac to La Corredoria | 3,607.36 mi (5,805.49 km) |
| Potomac to La Eliana | 3,964.33 mi (6,379.97 km) |
| Potomac to La Escala | 4,058.29 mi (6,531.19 km) |
