| Oconomowoc to Nasaud | 4,973.73 mi (8,004.45 km) |
| Oconomowoc to Navodari | 5,261.59 mi (8,467.70 km) |
| Oconomowoc to Negresti-Oas | 4,912.69 mi (7,906.22 km) |
| Oconomowoc to Nehoiu | 5,132.45 mi (8,259.89 km) |
| Oconomowoc to Ocna Mures | 4,999.03 mi (8,045.16 km) |
| Oconomowoc to Odobesti | 5,136.96 mi (8,267.14 km) |
| Oconomowoc to Odorheiu Secuiesc | 5,051.13 mi (8,129.01 km) |
| Oconomowoc to Oltenita | 5,207.30 mi (8,380.34 km) |
| Oconomowoc to Onesti | 5,102.43 mi (8,211.57 km) |
| Oconomowoc to Oradea | 4,900.37 mi (7,886.38 km) |
| Oconomowoc to Orastie | 5,002.85 mi (8,051.30 km) |
| Oconomowoc to Oravita | 4,989.36 mi (8,029.60 km) |
| Oconomowoc to Orsova | 5,029.48 mi (8,094.16 km) |
| Oconomowoc to Otelu Rosu | 4,989.67 mi (8,030.10 km) |
| Oconomowoc to Otopeni | 5,164.79 mi (8,311.92 km) |
