| Southborough to Oberkirch | 392.48 mi (631.64 km) |
| Southborough to Obernburg am Main | 400.34 mi (644.29 km) |
| Southborough to Obernkirchen | 386.36 mi (621.78 km) |
| Southborough to Oberschleissheim | 542.84 mi (873.62 km) |
| Southborough to Oberstdorf | 519.78 mi (836.50 km) |
| Southborough to Obertraubling | 548.53 mi (882.77 km) |
| Southborough to Obertshausen | 382.94 mi (616.27 km) |
| Southborough to Oberursel | 369.62 mi (594.85 km) |
| Southborough to Ochsenfurt | 443.69 mi (714.05 km) |
| Southborough to Ochsenhausen | 482.61 mi (776.68 km) |
| Southborough to Ochtrup | 305.21 mi (491.18 km) |
| Southborough to Odenthal | 297.32 mi (478.48 km) |
| Southborough to Oelde | 342.17 mi (550.67 km) |
| Southborough to Oelsnitz | 521.81 mi (839.77 km) |
| Southborough to Oer-Erkenschwick | 302.83 mi (487.37 km) |
