| Potomac to San Baudilio de Llobregat | 4,031.27 mi (6,487.70 km) |
| Potomac to San Celoni | 4,041.54 mi (6,504.23 km) |
| Potomac to San Cugat del Valles | 4,029.39 mi (6,484.67 km) |
| Potomac to San Fausto de Campcentellas | 4,035.58 mi (6,494.64 km) |
| Potomac to San Feliu de Guixols | 4,063.72 mi (6,539.93 km) |
| Potomac to San Feliu de Llobregat | 4,030.22 mi (6,486.02 km) |
| Potomac to San Fernando | 3,780.43 mi (6,084.01 km) |
| Potomac to San Fernando de Henares | 3,795.04 mi (6,107.53 km) |
| Potomac to San Fructuoso de Bages | 4,011.11 mi (6,455.25 km) |
| Potomac to San Javier | 4,004.06 mi (6,443.91 km) |
| Potomac to San Juan de Alicante | 4,004.63 mi (6,444.82 km) |
| Potomac to San Juan de Aznalfarache | 3,762.70 mi (6,055.48 km) |
| Potomac to San Juan de Vilasar | 4,042.69 mi (6,506.08 km) |
| Potomac to San Juan del Puerto | 3,723.59 mi (5,992.53 km) |
| Potomac to San Juan Despi | 4,031.34 mi (6,487.81 km) |
