| Northampton to Oberkirch | 470.32 mi (756.91 km) |
| Northampton to Obernburg am Main | 465.77 mi (749.58 km) |
| Northampton to Obernkirchen | 423.18 mi (681.04 km) |
| Northampton to Oberschleissheim | 614.39 mi (988.76 km) |
| Northampton to Oberstdorf | 598.16 mi (962.65 km) |
| Northampton to Obertraubling | 614.54 mi (989.00 km) |
| Northampton to Obertshausen | 446.90 mi (719.21 km) |
| Northampton to Oberursel | 432.76 mi (696.46 km) |
| Northampton to Ochsenfurt | 508.79 mi (818.82 km) |
| Northampton to Ochsenhausen | 558.57 mi (898.93 km) |
| Northampton to Ochtrup | 342.03 mi (550.45 km) |
| Northampton to Odenthal | 353.16 mi (568.36 km) |
| Northampton to Oelde | 385.16 mi (619.85 km) |
| Northampton to Oelsnitz | 576.82 mi (928.31 km) |
| Northampton to Oer-Erkenschwick | 349.13 mi (561.87 km) |
