| Caldas da Rainha to Navodari | 1,954.10 mi (3,144.81 km) |
| Caldas da Rainha to Negresti-Oas | 1,714.73 mi (2,759.59 km) |
| Caldas da Rainha to Nehoiu | 1,839.11 mi (2,959.75 km) |
| Caldas da Rainha to Ocna Mures | 1,724.35 mi (2,775.07 km) |
| Caldas da Rainha to Odobesti | 1,876.13 mi (3,019.34 km) |
| Caldas da Rainha to Odorheiu Secuiesc | 1,792.64 mi (2,884.98 km) |
| Caldas da Rainha to Oltenita | 1,857.14 mi (2,988.78 km) |
| Caldas da Rainha to Onesti | 1,862.50 mi (2,997.40 km) |
| Caldas da Rainha to Oradea | 1,637.81 mi (2,635.81 km) |
| Caldas da Rainha to Orastie | 1,690.25 mi (2,720.19 km) |
| Caldas da Rainha to Oravita | 1,613.69 mi (2,596.98 km) |
| Caldas da Rainha to Orsova | 1,647.55 mi (2,651.47 km) |
| Caldas da Rainha to Otelu Rosu | 1,647.99 mi (2,652.19 km) |
| Caldas da Rainha to Otopeni | 1,828.10 mi (2,942.04 km) |
| Caldas da Rainha to Ovidiu | 1,951.67 mi (3,140.91 km) |
