| Somerville to Oskaloosa (Iowa) | 1,108.32 mi (1,783.67 km) |
| Somerville to Oswego (Illinois) | 884.31 mi (1,423.16 km) |
| Somerville to Oswego (New York) | 282.78 mi (455.09 km) |
| Somerville to Otsego (Minnesota) | 1,136.02 mi (1,828.24 km) |
| Somerville to Ottawa (Illinois) | 913.05 mi (1,469.41 km) |
| Somerville to Ottawa (Kansas) | 1,291.64 mi (2,078.70 km) |
| Somerville to Ottumwa (Iowa) | 1,100.79 mi (1,771.54 km) |
| Somerville to Overland (Missouri) | 1,040.83 mi (1,675.05 km) |
| Somerville to Overland Park (Kansas) | 1,255.79 mi (2,021.00 km) |
| Somerville to Overlea (Maryland) | 351.72 mi (566.03 km) |
| Somerville to Oviedo (Florida) | 1,103.53 mi (1,775.96 km) |
| Somerville to Owasso (Oklahoma) | 1,381.36 mi (2,223.09 km) |
| Somerville to Owatonna (Minnesota) | 1,116.63 mi (1,797.05 km) |
| Somerville to Owensboro (Kentucky) | 903.52 mi (1,454.07 km) |
| Somerville to Owings Mills (Maryland) | 361.35 mi (581.54 km) |
