| Oceanside to Nasaud | 6,388.15 mi (10,280.73 km) |
| Oceanside to Navodari | 6,666.23 mi (10,728.26 km) |
| Oceanside to Negresti-Oas | 6,329.66 mi (10,186.60 km) |
| Oceanside to Nehoiu | 6,549.03 mi (10,539.65 km) |
| Oceanside to Ocna Mures | 6,427.30 mi (10,343.75 km) |
| Oceanside to Odobesti | 6,542.36 mi (10,528.91 km) |
| Oceanside to Odorheiu Secuiesc | 6,467.36 mi (10,408.21 km) |
| Oceanside to Oltenita | 6,633.07 mi (10,674.90 km) |
| Oceanside to Onesti | 6,505.74 mi (10,469.98 km) |
| Oceanside to Oradea | 6,338.30 mi (10,200.51 km) |
| Oceanside to Orastie | 6,442.24 mi (10,367.79 km) |
| Oceanside to Oravita | 6,449.53 mi (10,379.51 km) |
| Oceanside to Orsova | 6,486.76 mi (10,439.43 km) |
| Oceanside to Otelu Rosu | 6,439.56 mi (10,363.48 km) |
| Oceanside to Otopeni | 6,591.36 mi (10,607.77 km) |
