| Sierra Vista Southeast to Oerlinghausen | 5,593.81 mi (9,002.37 km) |
| Sierra Vista Southeast to Oestrich-Winkel | 5,660.51 mi (9,109.71 km) |
| Sierra Vista Southeast to Offenburg | 5,727.25 mi (9,217.12 km) |
| Sierra Vista Southeast to Oftersheim | 5,708.72 mi (9,187.30 km) |
| Sierra Vista Southeast to Ohrdruf | 5,712.64 mi (9,193.61 km) |
| Sierra Vista Southeast to Ohringen | 5,747.45 mi (9,249.63 km) |
| Sierra Vista Southeast to Olbernhau | 5,802.88 mi (9,338.83 km) |
| Sierra Vista Southeast to Olching | 5,855.21 mi (9,423.06 km) |
| Sierra Vista Southeast to Oldenburg | 5,526.43 mi (8,893.92 km) |
| Sierra Vista Southeast to Oldenburg in Holstein | 5,555.73 mi (8,941.09 km) |
| Sierra Vista Southeast to Olfen | 5,563.30 mi (8,953.26 km) |
| Sierra Vista Southeast to Olpe | 5,609.33 mi (9,027.34 km) |
| Sierra Vista Southeast to Olsberg | 5,615.72 mi (9,037.63 km) |
| Sierra Vista Southeast to Oranienburg | 5,699.28 mi (9,172.10 km) |
| Sierra Vista Southeast to Ortenberg | 5,679.65 mi (9,140.52 km) |
