| Adelphi to Oerlinghausen | 3,996.88 mi (6,432.35 km) |
| Adelphi to Oestrich-Winkel | 4,025.93 mi (6,479.11 km) |
| Adelphi to Offenburg | 4,067.76 mi (6,546.43 km) |
| Adelphi to Oftersheim | 4,067.91 mi (6,546.66 km) |
| Adelphi to Ohrdruf | 4,110.67 mi (6,615.49 km) |
| Adelphi to Ohringen | 4,110.22 mi (6,614.75 km) |
| Adelphi to Olbernhau | 4,217.38 mi (6,787.21 km) |
| Adelphi to Olching | 4,215.22 mi (6,783.74 km) |
| Adelphi to Oldenburg | 3,947.27 mi (6,352.51 km) |
| Adelphi to Oldenburg in Holstein | 4,015.87 mi (6,462.91 km) |
| Adelphi to Olfen | 3,953.48 mi (6,362.50 km) |
| Adelphi to Olpe | 3,990.53 mi (6,422.13 km) |
| Adelphi to Olsberg | 4,006.94 mi (6,448.54 km) |
| Adelphi to Oranienburg | 4,148.65 mi (6,676.61 km) |
| Adelphi to Ortenberg | 4,058.09 mi (6,530.86 km) |
