| Potomac to Saarijarvi | 4,224.74 mi (6,799.05 km) |
| Potomac to Salo | 4,243.18 mi (6,828.74 km) |
| Potomac to Sastamala | 4,204.64 mi (6,766.71 km) |
| Potomac to Savonlinna | 4,354.31 mi (7,007.58 km) |
| Potomac to Seinajoki | 4,154.98 mi (6,686.80 km) |
| Potomac to Siilinjarvi | 4,276.60 mi (6,882.52 km) |
| Potomac to Sipoo | 4,306.84 mi (6,931.19 km) |
| Potomac to Sippola | 4,343.68 mi (6,990.48 km) |
| Potomac to Sodankyla | 4,098.90 mi (6,596.54 km) |
| Potomac to Somero | 4,246.34 mi (6,833.83 km) |
| Potomac to Sotkamo | 4,257.11 mi (6,851.16 km) |
| Potomac to Tampere | 4,223.96 mi (6,797.81 km) |
| Potomac to Tornio | 4,091.05 mi (6,583.91 km) |
| Potomac to Turku | 4,215.46 mi (6,784.13 km) |
| Potomac to Tuusula | 4,298.32 mi (6,917.47 km) |
