| Portage to Storm Lake (Iowa) | 490.61 mi (789.56 km) |
| Portage to Storrs (Connecticut) | 684.71 mi (1,101.93 km) |
| Portage to Stoughton (Wisconsin) | 191.46 mi (308.12 km) |
| Portage to Stow (Ohio) | 225.78 mi (363.35 km) |
| Portage to Streamwood (Illinois) | 133.19 mi (214.35 km) |
| Portage to Streator (Illinois) | 182.95 mi (294.43 km) |
| Portage to Streetsboro (Ohio) | 228.73 mi (368.10 km) |
| Portage to Strongsville (Ohio) | 203.21 mi (327.03 km) |
| Portage to Stuart (Florida) | 1,079.64 mi (1,737.52 km) |
| Portage to Stuarts Draft (Virginia) | 450.81 mi (725.51 km) |
| Portage to Sturgis (Michigan) | 29.08 mi (46.79 km) |
| Portage to Suamico (Wisconsin) | 209.21 mi (336.69 km) |
| Portage to Sudley (Virginia) | 485.98 mi (782.11 km) |
| Portage to Suffern (New York) | 595.28 mi (958.01 km) |
| Portage to Suffolk (Virginia) | 609.92 mi (981.57 km) |
