| Adrian to Oerlinghausen | 4,125.82 mi (6,639.87 km) |
| Adrian to Oestrich-Winkel | 4,170.63 mi (6,711.99 km) |
| Adrian to Offenburg | 4,223.42 mi (6,796.94 km) |
| Adrian to Oftersheim | 4,215.63 mi (6,784.40 km) |
| Adrian to Ohrdruf | 4,242.85 mi (6,828.20 km) |
| Adrian to Ohringen | 4,256.84 mi (6,850.72 km) |
| Adrian to Olbernhau | 4,344.12 mi (6,991.18 km) |
| Adrian to Olching | 4,363.97 mi (7,023.13 km) |
| Adrian to Oldenburg | 4,068.54 mi (6,547.68 km) |
| Adrian to Oldenburg in Holstein | 4,122.62 mi (6,634.72 km) |
| Adrian to Olfen | 4,087.19 mi (6,577.70 km) |
| Adrian to Olpe | 4,128.32 mi (6,643.89 km) |
| Adrian to Olsberg | 4,140.79 mi (6,663.96 km) |
| Adrian to Oranienburg | 4,261.10 mi (6,857.58 km) |
| Adrian to Ortenberg | 4,197.71 mi (6,755.55 km) |
