| Euclid to Nasaud | 4,809.24 mi (7,739.72 km) |
| Euclid to Navodari | 5,096.51 mi (8,202.04 km) |
| Euclid to Negresti-Oas | 4,748.14 mi (7,641.40 km) |
| Euclid to Nehoiu | 4,964.86 mi (7,990.17 km) |
| Euclid to Ocna Mures | 4,828.96 mi (7,771.46 km) |
| Euclid to Odobesti | 4,973.41 mi (8,003.93 km) |
| Euclid to Odorheiu Secuiesc | 4,884.83 mi (7,861.38 km) |
| Euclid to Oltenita | 5,035.24 mi (8,103.44 km) |
| Euclid to Onesti | 4,940.16 mi (7,950.41 km) |
| Euclid to Oradea | 4,728.01 mi (7,608.99 km) |
| Euclid to Orastie | 4,828.49 mi (7,770.70 km) |
| Euclid to Oravita | 4,807.12 mi (7,736.32 km) |
| Euclid to Orsova | 4,847.84 mi (7,801.84 km) |
| Euclid to Otelu Rosu | 4,811.44 mi (7,743.27 km) |
| Euclid to Otopeni | 4,993.03 mi (8,035.50 km) |
