| Portales to Oerlinghausen | 5,212.75 mi (8,389.11 km) |
| Portales to Oestrich-Winkel | 5,272.60 mi (8,485.43 km) |
| Portales to Offenburg | 5,334.93 mi (8,585.75 km) |
| Portales to Oftersheim | 5,319.90 mi (8,561.56 km) |
| Portales to Ohrdruf | 5,331.41 mi (8,580.08 km) |
| Portales to Ohringen | 5,359.56 mi (8,625.39 km) |
| Portales to Olbernhau | 5,425.51 mi (8,731.52 km) |
| Portales to Olching | 5,467.43 mi (8,798.98 km) |
| Portales to Oldenburg | 5,148.32 mi (8,285.42 km) |
| Portales to Oldenburg in Holstein | 5,185.50 mi (8,345.26 km) |
| Portales to Olfen | 5,179.54 mi (8,335.66 km) |
| Portales to Olpe | 5,224.14 mi (8,407.44 km) |
| Portales to Olsberg | 5,232.52 mi (8,420.92 km) |
| Portales to Oranienburg | 5,328.06 mi (8,574.69 km) |
| Portales to Ortenberg | 5,294.39 mi (8,520.49 km) |
