| Corvallis to Oerlinghausen | 5,179.71 mi (8,335.94 km) |
| Corvallis to Oestrich-Winkel | 5,277.28 mi (8,492.96 km) |
| Corvallis to Offenburg | 5,364.12 mi (8,632.72 km) |
| Corvallis to Oftersheim | 5,327.98 mi (8,574.55 km) |
| Corvallis to Ohrdruf | 5,293.92 mi (8,519.74 km) |
| Corvallis to Ohringen | 5,360.17 mi (8,626.36 km) |
| Corvallis to Olbernhau | 5,361.91 mi (8,629.16 km) |
| Corvallis to Olching | 5,462.51 mi (8,791.06 km) |
| Corvallis to Oldenburg | 5,101.39 mi (8,209.90 km) |
| Corvallis to Oldenburg in Holstein | 5,093.76 mi (8,197.61 km) |
| Corvallis to Olfen | 5,163.71 mi (8,310.19 km) |
| Corvallis to Olpe | 5,214.69 mi (8,392.23 km) |
| Corvallis to Olsberg | 5,211.01 mi (8,386.32 km) |
| Corvallis to Oranienburg | 5,235.20 mi (8,425.23 km) |
| Corvallis to Ortenberg | 5,282.20 mi (8,500.88 km) |
