| Quarteira to Navodari | 1,969.75 mi (3,170.00 km) |
| Quarteira to Negresti-Oas | 1,755.50 mi (2,825.20 km) |
| Quarteira to Nehoiu | 1,861.57 mi (2,995.90 km) |
| Quarteira to Ocna Mures | 1,754.77 mi (2,824.03 km) |
| Quarteira to Odobesti | 1,901.09 mi (3,059.51 km) |
| Quarteira to Odorheiu Secuiesc | 1,821.79 mi (2,931.89 km) |
| Quarteira to Oltenita | 1,871.25 mi (3,011.49 km) |
| Quarteira to Onesti | 1,890.71 mi (3,042.80 km) |
| Quarteira to Oradea | 1,674.41 mi (2,694.70 km) |
| Quarteira to Orastie | 1,717.30 mi (2,763.73 km) |
| Quarteira to Oravita | 1,635.77 mi (2,632.51 km) |
| Quarteira to Orsova | 1,666.97 mi (2,682.73 km) |
| Quarteira to Otelu Rosu | 1,673.18 mi (2,692.72 km) |
| Quarteira to Otopeni | 1,845.31 mi (2,969.73 km) |
| Quarteira to Ovidiu | 1,967.00 mi (3,165.58 km) |
