| Grantham to Oberkirch | 486.55 mi (783.03 km) |
| Grantham to Obernburg am Main | 471.79 mi (759.28 km) |
| Grantham to Obernkirchen | 411.62 mi (662.45 km) |
| Grantham to Oberschleissheim | 623.86 mi (1,004.00 km) |
| Grantham to Oberstdorf | 613.97 mi (988.09 km) |
| Grantham to Obertraubling | 619.58 mi (997.12 km) |
| Grantham to Obertshausen | 452.10 mi (727.58 km) |
| Grantham to Oberursel | 437.58 mi (704.22 km) |
| Grantham to Ochsenfurt | 514.08 mi (827.33 km) |
| Grantham to Ochsenhausen | 572.30 mi (921.04 km) |
| Grantham to Ochtrup | 332.30 mi (534.78 km) |
| Grantham to Odenthal | 354.58 mi (570.65 km) |
| Grantham to Oelde | 377.92 mi (608.21 km) |
| Grantham to Oelsnitz | 574.39 mi (924.38 km) |
| Grantham to Oer-Erkenschwick | 344.73 mi (554.78 km) |
