| Arendal to Oberkirch | 686.49 mi (1,104.80 km) |
| Arendal to Obernburg am Main | 595.83 mi (958.90 km) |
| Arendal to Obernkirchen | 428.21 mi (689.14 km) |
| Arendal to Oberschleissheim | 714.73 mi (1,150.24 km) |
| Arendal to Oberstdorf | 766.10 mi (1,232.92 km) |
| Arendal to Obertraubling | 670.40 mi (1,078.90 km) |
| Arendal to Obertshausen | 579.98 mi (933.39 km) |
| Arendal to Oberursel | 570.59 mi (918.27 km) |
| Arendal to Ochsenfurt | 611.02 mi (983.34 km) |
| Arendal to Ochsenhausen | 719.41 mi (1,157.78 km) |
| Arendal to Ochtrup | 436.58 mi (702.60 km) |
| Arendal to Odenthal | 517.35 mi (832.59 km) |
| Arendal to Oelde | 458.56 mi (737.98 km) |
| Arendal to Oelsnitz | 572.15 mi (920.79 km) |
| Arendal to Oer-Erkenschwick | 474.89 mi (764.26 km) |
