| Arendal to Oerlinghausen | 448.72 mi (722.14 km) |
| Arendal to Oestrich-Winkel | 585.39 mi (942.10 km) |
| Arendal to Offenburg | 691.36 mi (1,112.64 km) |
| Arendal to Oftersheim | 628.11 mi (1,010.85 km) |
| Arendal to Ohrdruf | 533.14 mi (858.00 km) |
| Arendal to Ohringen | 640.55 mi (1,030.86 km) |
| Arendal to Olbernhau | 568.42 mi (914.79 km) |
| Arendal to Olching | 716.59 mi (1,153.23 km) |
| Arendal to Oldenburg | 367.98 mi (592.21 km) |
| Arendal to Oldenburg in Holstein | 298.63 mi (480.60 km) |
| Arendal to Olfen | 469.14 mi (755.01 km) |
| Arendal to Olpe | 515.67 mi (829.89 km) |
| Arendal to Olsberg | 491.44 mi (790.89 km) |
| Arendal to Oranienburg | 430.92 mi (693.51 km) |
| Arendal to Ortenberg | 560.12 mi (901.43 km) |
