| Spa to Navodari | 1,140.35 mi (1,835.21 km) |
| Spa to Negresti-Oas | 811.45 mi (1,305.91 km) |
| Spa to Nehoiu | 1,006.87 mi (1,620.40 km) |
| Spa to Ocna Mures | 869.59 mi (1,399.47 km) |
| Spa to Odobesti | 1,026.66 mi (1,652.25 km) |
| Spa to Odorheiu Secuiesc | 933.99 mi (1,503.11 km) |
| Spa to Oltenita | 1,064.68 mi (1,713.43 km) |
| Spa to Onesti | 999.18 mi (1,608.02 km) |
| Spa to Oradea | 766.47 mi (1,233.52 km) |
| Spa to Orastie | 858.27 mi (1,381.25 km) |
| Spa to Oravita | 823.41 mi (1,325.15 km) |
| Spa to Orsova | 864.44 mi (1,391.19 km) |
| Spa to Otelu Rosu | 833.76 mi (1,341.81 km) |
| Spa to Otopeni | 1,024.10 mi (1,648.13 km) |
| Spa to Ovidiu | 1,139.84 mi (1,834.39 km) |
