| Waterloo to Southern Pines (North Carolina) | 4,136.04 mi (6,656.32 km) |
| Waterloo to Southfield (Michigan) | 3,951.29 mi (6,358.99 km) |
| Waterloo to Southgate (Michigan) | 3,961.56 mi (6,375.52 km) |
| Waterloo to Southlake (Texas) | 4,950.53 mi (7,967.11 km) |
| Waterloo to Spanaway (Washington) | 4,975.80 mi (8,007.78 km) |
| Waterloo to Spanish Fork (Utah) | 5,069.28 mi (8,158.22 km) |
| Waterloo to Spanish Lake (Missouri) | 4,391.03 mi (7,066.68 km) |
| Waterloo to Spanish Springs (Nevada) | 5,336.15 mi (8,587.70 km) |
| Waterloo to Sparks (Nevada) | 5,342.33 mi (8,597.65 km) |
| Waterloo to Spartanburg (South Carolina) | 4,251.03 mi (6,841.37 km) |
| Waterloo to Spearfish (South Dakota) | 4,583.38 mi (7,376.24 km) |
| Waterloo to Speedway (Indiana) | 4,191.00 mi (6,744.77 km) |
| Waterloo to Spencer (Iowa) | 4,358.18 mi (7,013.82 km) |
| Waterloo to Spokane (Washington) | 4,813.84 mi (7,747.12 km) |
| Waterloo to Spokane Valley (Washington) | 4,808.79 mi (7,738.99 km) |
