| Dublin to Oberkirch | 705.84 mi (1,135.95 km) |
| Dublin to Obernburg am Main | 702.44 mi (1,130.47 km) |
| Dublin to Obernkirchen | 645.35 mi (1,038.59 km) |
| Dublin to Oberschleissheim | 851.51 mi (1,370.37 km) |
| Dublin to Oberstdorf | 833.53 mi (1,341.43 km) |
| Dublin to Obertraubling | 851.06 mi (1,369.65 km) |
| Dublin to Obertshausen | 683.32 mi (1,099.69 km) |
| Dublin to Oberursel | 669.04 mi (1,076.72 km) |
| Dublin to Ochsenfurt | 745.31 mi (1,199.45 km) |
| Dublin to Ochsenhausen | 794.93 mi (1,279.31 km) |
| Dublin to Ochtrup | 566.83 mi (912.23 km) |
| Dublin to Odenthal | 587.77 mi (945.93 km) |
| Dublin to Oelde | 612.76 mi (986.15 km) |
| Dublin to Oelsnitz | 809.08 mi (1,302.09 km) |
| Dublin to Oer-Erkenschwick | 579.53 mi (932.66 km) |
