| Shannon to Navodari | 1,787.21 mi (2,876.24 km) |
| Shannon to Negresti-Oas | 1,451.05 mi (2,335.24 km) |
| Shannon to Nehoiu | 1,653.53 mi (2,661.11 km) |
| Shannon to Ocna Mures | 1,515.88 mi (2,439.57 km) |
| Shannon to Odobesti | 1,670.99 mi (2,689.20 km) |
| Shannon to Odorheiu Secuiesc | 1,578.67 mi (2,540.62 km) |
| Shannon to Oltenita | 1,713.52 mi (2,757.64 km) |
| Shannon to Onesti | 1,641.90 mi (2,642.39 km) |
| Shannon to Oradea | 1,412.68 mi (2,273.49 km) |
| Shannon to Orastie | 1,506.64 mi (2,424.71 km) |
| Shannon to Oravita | 1,472.58 mi (2,369.89 km) |
| Shannon to Orsova | 1,513.62 mi (2,435.94 km) |
| Shannon to Otelu Rosu | 1,483.00 mi (2,386.65 km) |
| Shannon to Otopeni | 1,672.67 mi (2,691.90 km) |
| Shannon to Ovidiu | 1,786.88 mi (2,875.70 km) |
