| Waterloo to Navodari | 1,207.10 mi (1,942.64 km) |
| Waterloo to Negresti-Oas | 877.63 mi (1,412.41 km) |
| Waterloo to Nehoiu | 1,073.62 mi (1,727.82 km) |
| Waterloo to Ocna Mures | 936.31 mi (1,506.85 km) |
| Waterloo to Odobesti | 1,093.29 mi (1,759.49 km) |
| Waterloo to Odorheiu Secuiesc | 1,000.63 mi (1,610.36 km) |
| Waterloo to Oltenita | 1,131.38 mi (1,820.77 km) |
| Waterloo to Onesti | 1,065.69 mi (1,715.07 km) |
| Waterloo to Oradea | 833.19 mi (1,340.88 km) |
| Waterloo to Orastie | 925.02 mi (1,488.67 km) |
| Waterloo to Oravita | 889.69 mi (1,431.82 km) |
| Waterloo to Orsova | 930.73 mi (1,497.87 km) |
| Waterloo to Otelu Rosu | 900.37 mi (1,449.01 km) |
| Waterloo to Otopeni | 1,090.83 mi (1,755.52 km) |
| Waterloo to Ovidiu | 1,206.59 mi (1,941.82 km) |
