| Hilo to Oerlinghausen | 7,389.67 mi (11,892.53 km) |
| Hilo to Oestrich-Winkel | 7,511.84 mi (12,089.14 km) |
| Hilo to Offenburg | 7,612.32 mi (12,250.85 km) |
| Hilo to Oftersheim | 7,560.98 mi (12,168.21 km) |
| Hilo to Ohrdruf | 7,488.73 mi (12,051.95 km) |
| Hilo to Ohringen | 7,583.59 mi (12,204.61 km) |
| Hilo to Olbernhau | 7,524.79 mi (12,109.98 km) |
| Hilo to Olching | 7,671.29 mi (12,345.76 km) |
| Hilo to Oldenburg | 7,306.25 mi (11,758.28 km) |
| Hilo to Oldenburg in Holstein | 7,257.35 mi (11,679.58 km) |
| Hilo to Olfen | 7,390.56 mi (11,893.95 km) |
| Hilo to Olpe | 7,442.49 mi (11,977.53 km) |
| Hilo to Olsberg | 7,428.43 mi (11,954.90 km) |
| Hilo to Oranienburg | 7,382.62 mi (11,881.17 km) |
| Hilo to Ortenberg | 7,501.34 mi (12,072.23 km) |
