| Portage to Southern Pines (North Carolina) | 587.59 mi (945.63 km) |
| Portage to Southfield (Michigan) | 120.52 mi (193.96 km) |
| Portage to Southgate (Michigan) | 122.06 mi (196.44 km) |
| Portage to Southlake (Texas) | 897.68 mi (1,444.67 km) |
| Portage to Spanaway (Washington) | 1,824.31 mi (2,935.94 km) |
| Portage to Spanish Fork (Utah) | 1,357.53 mi (2,184.73 km) |
| Portage to Spanish Lake (Missouri) | 338.15 mi (544.21 km) |
| Portage to Spanish Springs (Nevada) | 1,775.76 mi (2,857.80 km) |
| Portage to Sparks (Nevada) | 1,779.81 mi (2,864.32 km) |
| Portage to Spartanburg (South Carolina) | 538.87 mi (867.22 km) |
| Portage to Spearfish (South Dakota) | 927.30 mi (1,492.34 km) |
| Portage to Speedway (Indiana) | 169.76 mi (273.20 km) |
| Portage to Spencer (Iowa) | 489.89 mi (788.41 km) |
| Portage to Spokane (Washington) | 1,590.51 mi (2,559.68 km) |
| Portage to Spokane Valley (Washington) | 1,581.27 mi (2,544.81 km) |
