| Northampton to Oerlinghausen | 405.90 mi (653.24 km) |
| Northampton to Oestrich-Winkel | 415.06 mi (667.97 km) |
| Northampton to Offenburg | 467.57 mi (752.47 km) |
| Northampton to Oftersheim | 458.19 mi (737.38 km) |
| Northampton to Ohrdruf | 508.48 mi (818.31 km) |
| Northampton to Ohringen | 500.00 mi (804.67 km) |
| Northampton to Olbernhau | 621.02 mi (999.43 km) |
| Northampton to Olching | 606.39 mi (975.89 km) |
| Northampton to Oldenburg | 386.36 mi (621.79 km) |
| Northampton to Oldenburg in Holstein | 506.58 mi (815.26 km) |
| Northampton to Olfen | 353.89 mi (569.53 km) |
| Northampton to Olpe | 383.37 mi (616.97 km) |
| Northampton to Olsberg | 405.05 mi (651.86 km) |
| Northampton to Oranienburg | 594.60 mi (956.92 km) |
| Northampton to Ortenberg | 448.54 mi (721.85 km) |
