| Ottawa to Storm Lake (Iowa) | 338.86 mi (545.35 km) |
| Ottawa to Storrs (Connecticut) | 855.86 mi (1,377.38 km) |
| Ottawa to Stoughton (Wisconsin) | 110.24 mi (177.41 km) |
| Ottawa to Stow (Ohio) | 383.97 mi (617.93 km) |
| Ottawa to Streamwood (Illinois) | 56.85 mi (91.50 km) |
| Ottawa to Streator (Illinois) | 15.96 mi (25.69 km) |
| Ottawa to Streetsboro (Ohio) | 388.27 mi (624.86 km) |
| Ottawa to Strongsville (Ohio) | 362.80 mi (583.88 km) |
| Ottawa to Stuart (Florida) | 1,092.76 mi (1,758.63 km) |
| Ottawa to Stuarts Draft (Virginia) | 568.90 mi (915.55 km) |
| Ottawa to Sturgis (Michigan) | 178.76 mi (287.69 km) |
| Ottawa to Suamico (Wisconsin) | 229.83 mi (369.87 km) |
| Ottawa to Sudley (Virginia) | 624.23 mi (1,004.60 km) |
| Ottawa to Suffern (New York) | 762.24 mi (1,226.70 km) |
| Ottawa to Suffolk (Virginia) | 728.15 mi (1,171.84 km) |
