| Opelika to Nuth | 4,558.00 mi (7,335.39 km) |
| Opelika to Oegstgeest | 4,468.68 mi (7,191.65 km) |
| Opelika to Oirschot | 4,519.23 mi (7,273.00 km) |
| Opelika to Oisterwijk | 4,513.08 mi (7,263.10 km) |
| Opelika to Oldebroek | 4,518.06 mi (7,271.11 km) |
| Opelika to Oldenzaal | 4,561.83 mi (7,341.55 km) |
| Opelika to Ommen | 4,536.41 mi (7,300.64 km) |
| Opelika to Oosterend | 4,510.08 mi (7,258.27 km) |
| Opelika to Oosterhout | 4,497.88 mi (7,238.65 km) |
| Opelika to Oosterwolde | 4,519.09 mi (7,272.78 km) |
| Opelika to Oostzaan | 4,478.75 mi (7,207.85 km) |
| Opelika to Opmeer | 4,474.61 mi (7,201.18 km) |
| Opelika to Oss | 4,520.86 mi (7,275.63 km) |
| Opelika to Oud-Beijerland | 4,475.29 mi (7,202.28 km) |
| Opelika to Oudenbosch | 4,486.00 mi (7,219.51 km) |
