| Half Moon Bay to Oerlinghausen | 5,591.66 mi (8,998.90 km) |
| Half Moon Bay to Oestrich-Winkel | 5,681.96 mi (9,144.23 km) |
| Half Moon Bay to Offenburg | 5,764.14 mi (9,276.49 km) |
| Half Moon Bay to Oftersheim | 5,732.39 mi (9,225.39 km) |
| Half Moon Bay to Ohrdruf | 5,707.86 mi (9,185.92 km) |
| Half Moon Bay to Ohringen | 5,766.53 mi (9,280.33 km) |
| Half Moon Bay to Olbernhau | 5,781.87 mi (9,305.02 km) |
| Half Moon Bay to Olching | 5,871.02 mi (9,448.50 km) |
| Half Moon Bay to Oldenburg | 5,515.55 mi (8,876.42 km) |
| Half Moon Bay to Oldenburg in Holstein | 5,517.01 mi (8,878.77 km) |
| Half Moon Bay to Olfen | 5,571.81 mi (8,966.96 km) |
| Half Moon Bay to Olpe | 5,621.88 mi (9,047.54 km) |
| Half Moon Bay to Olsberg | 5,620.78 mi (9,045.78 km) |
| Half Moon Bay to Oranienburg | 5,659.92 mi (9,108.75 km) |
| Half Moon Bay to Ortenberg | 5,690.62 mi (9,158.17 km) |
