| Portland to Senftenberg | 5,252.27 mi (8,452.71 km) |
| Portland to Siegburg | 5,138.57 mi (8,269.73 km) |
| Portland to Siegen | 5,153.52 mi (8,293.79 km) |
| Portland to Sigmaringen | 5,345.03 mi (8,601.99 km) |
| Portland to Simbach am Inn | 5,424.94 mi (8,730.60 km) |
| Portland to Simmerath | 5,127.82 mi (8,252.43 km) |
| Portland to Sindelfingen | 5,303.23 mi (8,534.73 km) |
| Portland to Sinsheim | 5,269.07 mi (8,479.75 km) |
| Portland to Sinzheim | 5,279.78 mi (8,496.99 km) |
| Portland to Sinzig | 5,154.42 mi (8,295.23 km) |
| Portland to Soest | 5,116.09 mi (8,233.55 km) |
| Portland to Solingen | 5,114.70 mi (8,231.32 km) |
| Portland to Soltau | 5,074.06 mi (8,165.91 km) |
| Portland to Sommerda | 5,209.65 mi (8,384.13 km) |
| Portland to Sondershausen | 5,191.92 mi (8,355.59 km) |
