| Southborough to Nasaud | 1,116.35 mi (1,796.59 km) |
| Southborough to Navodari | 1,388.96 mi (2,235.31 km) |
| Southborough to Negresti-Oas | 1,058.74 mi (1,703.88 km) |
| Southborough to Nehoiu | 1,255.48 mi (2,020.50 km) |
| Southborough to Ocna Mures | 1,118.18 mi (1,799.54 km) |
| Southborough to Odobesti | 1,275.08 mi (2,052.04 km) |
| Southborough to Odorheiu Secuiesc | 1,182.43 mi (1,902.94 km) |
| Southborough to Oltenita | 1,312.87 mi (2,112.87 km) |
| Southborough to Onesti | 1,247.32 mi (2,007.37 km) |
| Southborough to Oradea | 1,015.05 mi (1,633.57 km) |
| Southborough to Orastie | 1,106.71 mi (1,781.08 km) |
| Southborough to Oravita | 1,070.03 mi (1,722.05 km) |
| Southborough to Orsova | 1,111.07 mi (1,788.09 km) |
| Southborough to Otelu Rosu | 1,081.61 mi (1,740.68 km) |
| Southborough to Otopeni | 1,272.44 mi (2,047.80 km) |
