| Rathfarnham to Oerlinghausen | 632.52 mi (1,017.95 km) |
| Rathfarnham to Oestrich-Winkel | 652.08 mi (1,049.43 km) |
| Rathfarnham to Offenburg | 702.28 mi (1,130.20 km) |
| Rathfarnham to Oftersheim | 695.25 mi (1,118.90 km) |
| Rathfarnham to Ohrdruf | 740.84 mi (1,192.27 km) |
| Rathfarnham to Ohringen | 737.11 mi (1,186.27 km) |
| Rathfarnham to Olbernhau | 851.54 mi (1,370.41 km) |
| Rathfarnham to Olching | 843.38 mi (1,357.29 km) |
| Rathfarnham to Oldenburg | 598.87 mi (963.79 km) |
| Rathfarnham to Oldenburg in Holstein | 702.26 mi (1,130.17 km) |
| Rathfarnham to Olfen | 584.17 mi (940.13 km) |
| Rathfarnham to Olpe | 617.74 mi (994.16 km) |
| Rathfarnham to Olsberg | 636.80 mi (1,024.83 km) |
| Rathfarnham to Oranienburg | 809.61 mi (1,302.94 km) |
| Rathfarnham to Ortenberg | 684.35 mi (1,101.36 km) |
