| Grantham to Oerlinghausen | 397.06 mi (639.01 km) |
| Grantham to Oestrich-Winkel | 422.61 mi (680.13 km) |
| Grantham to Offenburg | 484.55 mi (779.81 km) |
| Grantham to Oftersheim | 468.40 mi (753.81 km) |
| Grantham to Ohrdruf | 505.48 mi (813.48 km) |
| Grantham to Ohringen | 509.05 mi (819.24 km) |
| Grantham to Olbernhau | 615.89 mi (991.18 km) |
| Grantham to Olching | 616.58 mi (992.29 km) |
| Grantham to Oldenburg | 367.91 mi (592.09 km) |
| Grantham to Oldenburg in Holstein | 481.26 mi (774.52 km) |
| Grantham to Olfen | 348.60 mi (561.02 km) |
| Grantham to Olpe | 383.51 mi (617.21 km) |
| Grantham to Olsberg | 401.41 mi (646.01 km) |
| Grantham to Oranienburg | 578.33 mi (930.74 km) |
| Grantham to Ortenberg | 451.33 mi (726.35 km) |
