| Ollerton to Nasaud | 1,187.97 mi (1,911.86 km) |
| Ollerton to Navodari | 1,468.71 mi (2,363.66 km) |
| Ollerton to Negresti-Oas | 1,128.32 mi (1,815.86 km) |
| Ollerton to Nehoiu | 1,335.13 mi (2,148.68 km) |
| Ollerton to Ocna Mures | 1,197.47 mi (1,927.15 km) |
| Ollerton to Odobesti | 1,350.34 mi (2,173.16 km) |
| Ollerton to Odorheiu Secuiesc | 1,258.56 mi (2,025.46 km) |
| Ollerton to Oltenita | 1,398.85 mi (2,251.24 km) |
| Ollerton to Onesti | 1,320.23 mi (2,124.70 km) |
| Ollerton to Oradea | 1,094.59 mi (1,761.57 km) |
| Ollerton to Orastie | 1,191.38 mi (1,917.33 km) |
| Ollerton to Oravita | 1,164.13 mi (1,873.49 km) |
| Ollerton to Orsova | 1,205.01 mi (1,939.27 km) |
| Ollerton to Otelu Rosu | 1,170.78 mi (1,884.19 km) |
| Ollerton to Otopeni | 1,357.35 mi (2,184.44 km) |
