| Oliveira do Hospital to Navodari | 1,867.17 mi (3,004.93 km) |
| Oliveira do Hospital to Negresti-Oas | 1,623.43 mi (2,612.66 km) |
| Oliveira do Hospital to Nehoiu | 1,750.88 mi (2,817.77 km) |
| Oliveira do Hospital to Ocna Mures | 1,634.73 mi (2,630.85 km) |
| Oliveira do Hospital to Odobesti | 1,787.37 mi (2,876.50 km) |
| Oliveira do Hospital to Odorheiu Secuiesc | 1,703.18 mi (2,741.00 km) |
| Oliveira do Hospital to Oltenita | 1,770.68 mi (2,849.63 km) |
| Oliveira do Hospital to Onesti | 1,773.14 mi (2,853.60 km) |
| Oliveira do Hospital to Oradea | 1,547.23 mi (2,490.03 km) |
| Oliveira do Hospital to Orastie | 1,601.29 mi (2,577.03 km) |
| Oliveira do Hospital to Oravita | 1,525.82 mi (2,455.57 km) |
| Oliveira do Hospital to Orsova | 1,560.19 mi (2,510.89 km) |
| Oliveira do Hospital to Otelu Rosu | 1,559.45 mi (2,509.69 km) |
| Oliveira do Hospital to Otopeni | 1,740.98 mi (2,801.84 km) |
| Oliveira do Hospital to Ovidiu | 1,864.82 mi (3,001.14 km) |
