| Plainview to Oerlinghausen | 3,777.30 mi (6,078.97 km) |
| Plainview to Oestrich-Winkel | 3,805.12 mi (6,123.74 km) |
| Plainview to Offenburg | 3,846.30 mi (6,190.02 km) |
| Plainview to Oftersheim | 3,846.88 mi (6,190.96 km) |
| Plainview to Ohrdruf | 3,890.74 mi (6,261.55 km) |
| Plainview to Ohringen | 3,889.24 mi (6,259.13 km) |
| Plainview to Olbernhau | 3,997.85 mi (6,433.91 km) |
| Plainview to Olching | 3,994.07 mi (6,427.84 km) |
| Plainview to Oldenburg | 3,728.44 mi (6,000.34 km) |
| Plainview to Oldenburg in Holstein | 3,798.55 mi (6,113.18 km) |
| Plainview to Olfen | 3,733.52 mi (6,008.51 km) |
| Plainview to Olpe | 3,770.22 mi (6,067.59 km) |
| Plainview to Olsberg | 3,786.93 mi (6,094.48 km) |
| Plainview to Oranienburg | 3,930.58 mi (6,325.66 km) |
| Plainview to Ortenberg | 3,837.61 mi (6,176.04 km) |
