| Union Hill-Novelty Hill to Oerlinghausen | 4,962.72 mi (7,986.73 km) |
| Union Hill-Novelty Hill to Oestrich-Winkel | 5,061.69 mi (8,146.00 km) |
| Union Hill-Novelty Hill to Offenburg | 5,149.45 mi (8,287.24 km) |
| Union Hill-Novelty Hill to Oftersheim | 5,112.41 mi (8,227.64 km) |
| Union Hill-Novelty Hill to Ohrdruf | 5,076.49 mi (8,169.82 km) |
| Union Hill-Novelty Hill to Ohringen | 5,144.19 mi (8,278.77 km) |
| Union Hill-Novelty Hill to Olbernhau | 5,143.36 mi (8,277.43 km) |
| Union Hill-Novelty Hill to Olching | 5,246.03 mi (8,442.67 km) |
| Union Hill-Novelty Hill to Oldenburg | 4,884.03 mi (7,860.08 km) |
| Union Hill-Novelty Hill to Oldenburg in Holstein | 4,874.75 mi (7,845.15 km) |
| Union Hill-Novelty Hill to Olfen | 4,947.50 mi (7,962.23 km) |
| Union Hill-Novelty Hill to Olpe | 4,998.62 mi (8,044.51 km) |
| Union Hill-Novelty Hill to Olsberg | 4,994.44 mi (8,037.77 km) |
| Union Hill-Novelty Hill to Oranienburg | 5,015.88 mi (8,072.29 km) |
| Union Hill-Novelty Hill to Ortenberg | 5,065.85 mi (8,152.69 km) |
