| Aci Catena to Oerlinghausen | 1,041.04 mi (1,675.39 km) |
| Aci Catena to Oestrich-Winkel | 926.63 mi (1,491.26 km) |
| Aci Catena to Offenburg | 833.33 mi (1,341.11 km) |
| Aci Catena to Oftersheim | 876.20 mi (1,410.10 km) |
| Aci Catena to Ohrdruf | 939.16 mi (1,511.42 km) |
| Aci Catena to Ohringen | 849.30 mi (1,366.82 km) |
| Aci Catena to Olbernhau | 907.15 mi (1,459.92 km) |
| Aci Catena to Olching | 757.18 mi (1,218.56 km) |
| Aci Catena to Oldenburg | 1,123.98 mi (1,808.87 km) |
| Aci Catena to Oldenburg in Holstein | 1,171.25 mi (1,884.94 km) |
| Aci Catena to Olfen | 1,045.67 mi (1,682.84 km) |
| Aci Catena to Olpe | 993.59 mi (1,599.02 km) |
| Aci Catena to Olsberg | 1,003.98 mi (1,615.75 km) |
| Aci Catena to Oranienburg | 1,051.04 mi (1,691.48 km) |
| Aci Catena to Ortenberg | 930.92 mi (1,498.17 km) |
