| Opelika to Octeville | 4,278.43 mi (6,885.46 km) |
| Opelika to Oignies | 4,452.29 mi (7,165.26 km) |
| Opelika to Oissel | 4,400.72 mi (7,082.28 km) |
| Opelika to Olivet | 4,471.81 mi (7,196.68 km) |
| Opelika to Ollioules | 4,777.93 mi (7,689.33 km) |
| Opelika to Olonne-sur-Mer | 4,343.01 mi (6,989.40 km) |
| Opelika to Oloron-Sainte-Marie | 4,479.19 mi (7,208.56 km) |
| Opelika to Onet Village | 4,595.05 mi (7,395.01 km) |
| Opelika to Onnaing | 4,479.12 mi (7,208.44 km) |
| Opelika to Orange | 4,701.55 mi (7,566.42 km) |
| Opelika to Orchies | 4,462.42 mi (7,181.57 km) |
| Opelika to Orleans | 4,471.19 mi (7,195.68 km) |
| Opelika to Orly | 4,470.54 mi (7,194.63 km) |
| Opelika to Ormesson-sur-Marne | 4,475.64 mi (7,202.84 km) |
| Opelika to Orsay | 4,462.98 mi (7,182.48 km) |
