| Vacaville to Oerlinghausen | 5,525.32 mi (8,892.15 km) |
| Vacaville to Oestrich-Winkel | 5,615.82 mi (9,037.79 km) |
| Vacaville to Offenburg | 5,698.16 mi (9,170.30 km) |
| Vacaville to Oftersheim | 5,666.26 mi (9,118.97 km) |
| Vacaville to Ohrdruf | 5,641.49 mi (9,079.10 km) |
| Vacaville to Ohringen | 5,700.35 mi (9,173.83 km) |
| Vacaville to Olbernhau | 5,715.38 mi (9,198.01 km) |
| Vacaville to Olching | 5,804.79 mi (9,341.91 km) |
| Vacaville to Oldenburg | 5,449.16 mi (8,769.57 km) |
| Vacaville to Oldenburg in Holstein | 5,450.46 mi (8,771.66 km) |
| Vacaville to Olfen | 5,505.57 mi (8,860.35 km) |
| Vacaville to Olpe | 5,555.67 mi (8,940.98 km) |
| Vacaville to Olsberg | 5,554.50 mi (8,939.11 km) |
| Vacaville to Oranienburg | 5,593.35 mi (9,001.62 km) |
| Vacaville to Ortenberg | 5,624.38 mi (9,051.56 km) |
