| South Portland to Oskarshamn | 3,657.63 mi (5,886.39 km) |
| South Portland to Ostersund | 3,444.93 mi (5,544.09 km) |
| South Portland to Oxelosund | 3,639.11 mi (5,856.59 km) |
| South Portland to Ronneby | 3,648.77 mi (5,872.13 km) |
| South Portland to Saffle | 3,489.09 mi (5,615.15 km) |
| South Portland to Sala | 3,587.37 mi (5,773.32 km) |
| South Portland to Saltsjobaden | 3,659.02 mi (5,888.63 km) |
| South Portland to Sandviken | 3,574.13 mi (5,752.00 km) |
| South Portland to Sater | 3,548.79 mi (5,711.22 km) |
| South Portland to Savja | 3,625.07 mi (5,833.99 km) |
| South Portland to Sjobo | 3,610.07 mi (5,809.85 km) |
| South Portland to Skara | 3,524.97 mi (5,672.88 km) |
| South Portland to Skelleftea | 3,584.08 mi (5,768.02 km) |
| South Portland to Skoghall | 3,500.49 mi (5,633.50 km) |
| South Portland to Skovde | 3,538.92 mi (5,695.34 km) |
