| South Portland to Cuenca | 3,415.18 mi (5,496.20 km) |
| South Portland to Cuevas del Almanzora | 3,520.92 mi (5,666.37 km) |
| South Portland to Cullera | 3,533.73 mi (5,686.99 km) |
| South Portland to Culleredo | 3,029.05 mi (4,874.78 km) |
| South Portland to Cunit | 3,553.50 mi (5,718.81 km) |
| South Portland to Daganzo de Arriba | 3,338.87 mi (5,373.40 km) |
| South Portland to Daimiel | 3,378.04 mi (5,436.43 km) |
| South Portland to Don Benito | 3,275.60 mi (5,271.56 km) |
| South Portland to Donostia | 3,322.39 mi (5,346.87 km) |
| South Portland to Dos Hermanas | 3,327.22 mi (5,354.65 km) |
| South Portland to Durango | 3,297.26 mi (5,306.43 km) |
| South Portland to Ecija | 3,359.22 mi (5,406.15 km) |
| South Portland to Ejea de los Caballeros | 3,396.88 mi (5,466.76 km) |
| South Portland to El Alamo | 3,323.52 mi (5,348.69 km) |
| South Portland to El Arahal | 3,345.70 mi (5,384.39 km) |
