| Ottawa to Security-Widefield (Colorado) | 858.06 mi (1,380.91 km) |
| Ottawa to Sedalia (Missouri) | 296.40 mi (477.01 km) |
| Ottawa to Sedro-Woolley (Washington) | 1,691.87 mi (2,722.80 km) |
| Ottawa to Seguin (Texas) | 960.72 mi (1,546.13 km) |
| Ottawa to Selden (New York) | 820.96 mi (1,321.20 km) |
| Ottawa to Selma (Alabama) | 625.47 mi (1,006.59 km) |
| Ottawa to Selma (California) | 1,677.50 mi (2,699.68 km) |
| Ottawa to Selma (Texas) | 971.31 mi (1,563.18 km) |
| Ottawa to Seminole (Florida) | 994.14 mi (1,599.91 km) |
| Ottawa to Seven Hills (Ohio) | 370.78 mi (596.71 km) |
| Ottawa to Seven Oaks (South Carolina) | 656.19 mi (1,056.03 km) |
| Ottawa to Severn (Maryland) | 657.26 mi (1,057.75 km) |
| Ottawa to Severna Park (Maryland) | 664.75 mi (1,069.82 km) |
| Ottawa to Sevierville (Tennessee) | 472.36 mi (760.19 km) |
| Ottawa to Seymour (Indiana) | 227.36 mi (365.89 km) |
