| Ottawa to Somersworth (New Hampshire) | 924.26 mi (1,487.45 km) |
| Ottawa to Somerton (Arizona) | 1,543.37 mi (2,483.81 km) |
| Ottawa to Somerville (Massachusetts) | 913.05 mi (1,469.41 km) |
| Ottawa to Somerville (New Jersey) | 742.91 mi (1,195.61 km) |
| Ottawa to Sonoma (California) | 1,786.03 mi (2,874.33 km) |
| Ottawa to Soquel (California) | 1,788.27 mi (2,877.93 km) |
| Ottawa to South Bend (Indiana) | 134.10 mi (215.82 km) |
| Ottawa to South Bradenton (Florida) | 1,023.11 mi (1,646.53 km) |
| Ottawa to South Burlington (Vermont) | 816.98 mi (1,314.80 km) |
| Ottawa to South Charleston (West Virginia) | 430.61 mi (693.00 km) |
| Ottawa to South Daytona (Florida) | 949.78 mi (1,528.53 km) |
| Ottawa to South El Monte (California) | 1,666.17 mi (2,681.45 km) |
| Ottawa to South Elgin (Illinois) | 51.24 mi (82.46 km) |
| Ottawa to South Euclid (Ohio) | 378.26 mi (608.75 km) |
| Ottawa to South Farmingdale (New York) | 801.65 mi (1,290.13 km) |
