| Nantes to Navodari | 1,458.31 mi (2,346.92 km) |
| Nantes to Negresti-Oas | 1,160.71 mi (1,867.98 km) |
| Nantes to Nehoiu | 1,329.25 mi (2,139.22 km) |
| Nantes to Ocna Mures | 1,197.92 mi (1,927.86 km) |
| Nantes to Odobesti | 1,357.38 mi (2,184.50 km) |
| Nantes to Odorheiu Secuiesc | 1,266.21 mi (2,037.77 km) |
| Nantes to Oltenita | 1,370.85 mi (2,206.17 km) |
| Nantes to Onesti | 1,335.36 mi (2,149.06 km) |
| Nantes to Oradea | 1,098.99 mi (1,768.65 km) |
| Nantes to Orastie | 1,175.35 mi (1,891.55 km) |
| Nantes to Oravita | 1,118.62 mi (1,800.25 km) |
| Nantes to Orsova | 1,158.18 mi (1,863.91 km) |
| Nantes to Otelu Rosu | 1,141.23 mi (1,836.64 km) |
| Nantes to Otopeni | 1,334.16 mi (2,147.13 km) |
| Nantes to Ovidiu | 1,456.94 mi (2,344.72 km) |
