| South Portland to Roeselare | 3,333.08 mi (5,364.07 km) |
| South Portland to Ronse | 3,357.38 mi (5,403.18 km) |
| South Portland to Rotselaar | 3,396.97 mi (5,466.90 km) |
| South Portland to Rumst | 3,381.68 mi (5,442.28 km) |
| South Portland to Saint-Ghislain | 3,374.01 mi (5,429.94 km) |
| South Portland to Saint-Nicolas | 3,438.60 mi (5,533.89 km) |
| South Portland to Saint-Vith | 3,472.45 mi (5,588.36 km) |
| South Portland to Scherpenheuvel | 3,405.93 mi (5,481.32 km) |
| South Portland to Schilde | 3,383.78 mi (5,445.67 km) |
| South Portland to Schoten | 3,380.68 mi (5,440.67 km) |
| South Portland to Seneffe | 3,389.41 mi (5,454.73 km) |
| South Portland to Seraing | 3,438.62 mi (5,533.92 km) |
| South Portland to Sint-Amandsberg | 3,355.57 mi (5,400.27 km) |
| South Portland to Sint-Andries | 3,329.04 mi (5,357.57 km) |
| South Portland to Sint-Genesius-Rode | 3,387.72 mi (5,452.01 km) |
