| American Canyon to Oerlinghausen | 5,543.70 mi (8,921.72 km) |
| American Canyon to Oestrich-Winkel | 5,634.41 mi (9,067.70 km) |
| American Canyon to Offenburg | 5,716.87 mi (9,200.41 km) |
| American Canyon to Oftersheim | 5,684.86 mi (9,148.89 km) |
| American Canyon to Ohrdruf | 5,659.81 mi (9,108.58 km) |
| American Canyon to Ohringen | 5,718.90 mi (9,203.67 km) |
| American Canyon to Olbernhau | 5,733.51 mi (9,227.20 km) |
| American Canyon to Olching | 5,823.28 mi (9,371.67 km) |
| American Canyon to Oldenburg | 5,467.46 mi (8,799.03 km) |
| American Canyon to Oldenburg in Holstein | 5,468.46 mi (8,800.64 km) |
| American Canyon to Olfen | 5,524.05 mi (8,890.10 km) |
| American Canyon to Olpe | 5,574.18 mi (8,970.77 km) |
| American Canyon to Olsberg | 5,572.94 mi (8,968.79 km) |
| American Canyon to Oranienburg | 5,611.31 mi (9,030.53 km) |
| American Canyon to Ortenberg | 5,642.86 mi (9,081.31 km) |
