| Welling to Nasaud | 1,124.79 mi (1,810.18 km) |
| Welling to Navodari | 1,398.85 mi (2,251.23 km) |
| Welling to Negresti-Oas | 1,066.81 mi (1,716.87 km) |
| Welling to Nehoiu | 1,265.28 mi (2,036.27 km) |
| Welling to Ocna Mures | 1,127.82 mi (1,815.05 km) |
| Welling to Odobesti | 1,284.21 mi (2,066.73 km) |
| Welling to Odorheiu Secuiesc | 1,191.63 mi (1,917.74 km) |
| Welling to Oltenita | 1,323.69 mi (2,130.28 km) |
| Welling to Onesti | 1,256.07 mi (2,021.44 km) |
| Welling to Oradea | 1,024.63 mi (1,648.99 km) |
| Welling to Orastie | 1,117.19 mi (1,797.94 km) |
| Welling to Oravita | 1,081.97 mi (1,741.26 km) |
| Welling to Orsova | 1,123.01 mi (1,807.31 km) |
| Welling to Otelu Rosu | 1,092.77 mi (1,758.65 km) |
| Welling to Otopeni | 1,283.07 mi (2,064.90 km) |
